./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.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_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/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_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/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_71af8df6-c88a-4c4e-8ef0-0124f01521b9/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 38a2fba2a92db51b6a97ddc82d5dc9e2df7a8770315ef841bfaf5f0764404946 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:30:27,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:30:27,492 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:30:27,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:30:27,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:30:27,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:30:27,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:30:27,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:30:27,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:30:27,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:30:27,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:30:27,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:30:27,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:30:27,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:30:27,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:30:27,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:30:27,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:30:27,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:30:27,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:30:27,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:30:27,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:30:27,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:30:27,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:30:27,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:30:27,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:30:27,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:30:27,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:30:27,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:30:27,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:30:27,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:30:27,556 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:30:27,557 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:30:27,558 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:30:27,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:30:27,560 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:30:27,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:30:27,561 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:30:27,561 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:30:27,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:30:27,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:30:27,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:30:27,563 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 19:30:27,583 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:30:27,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:30:27,584 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:30:27,584 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:30:27,584 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:30:27,584 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:30:27,585 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:30:27,585 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:30:27,585 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:30:27,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:30:27,585 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:30:27,586 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 19:30:27,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:30:27,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:30:27,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:30:27,586 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 19:30:27,587 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 19:30:27,587 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 19:30:27,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:30:27,587 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 19:30:27,587 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:30:27,588 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:30:27,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:30:27,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:30:27,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:30:27,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:30:27,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:30:27,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:30:27,589 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:30:27,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:30:27,589 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:30:27,590 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_71af8df6-c88a-4c4e-8ef0-0124f01521b9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38a2fba2a92db51b6a97ddc82d5dc9e2df7a8770315ef841bfaf5f0764404946 [2021-12-06 19:30:27,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:30:27,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:30:27,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:30:27,785 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:30:27,785 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:30:27,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i [2021-12-06 19:30:27,830 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/data/ddf95deb3/31dacc3d2e5a4a06b054e228bda036cf/FLAGd6020982b [2021-12-06 19:30:28,269 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:30:28,270 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i [2021-12-06 19:30:28,284 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/data/ddf95deb3/31dacc3d2e5a4a06b054e228bda036cf/FLAGd6020982b [2021-12-06 19:30:28,294 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/data/ddf95deb3/31dacc3d2e5a4a06b054e228bda036cf [2021-12-06 19:30:28,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:30:28,297 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:30:28,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:30:28,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:30:28,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:30:28,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:30:28" (1/1) ... [2021-12-06 19:30:28,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59bf315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:28, skipping insertion in model container [2021-12-06 19:30:28,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:30:28" (1/1) ... [2021-12-06 19:30:28,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:30:28,334 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:30:28,572 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:30:28,589 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 19:30:28,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2ba65a78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:28, skipping insertion in model container [2021-12-06 19:30:28,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:30:28,591 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-06 19:30:28,592 INFO L158 Benchmark]: Toolchain (without parser) took 294.71ms. Allocated memory is still 142.6MB. Free memory was 97.4MB in the beginning and 84.0MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-06 19:30:28,593 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 142.6MB. Free memory is still 116.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:30:28,594 INFO L158 Benchmark]: CACSL2BoogieTranslator took 292.64ms. Allocated memory is still 142.6MB. Free memory was 97.4MB in the beginning and 84.2MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-06 19:30:28,595 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 142.6MB. Free memory is still 116.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 292.64ms. Allocated memory is still 142.6MB. Free memory was 97.4MB in the beginning and 84.2MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. 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_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/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_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/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_71af8df6-c88a-4c4e-8ef0-0124f01521b9/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 38a2fba2a92db51b6a97ddc82d5dc9e2df7a8770315ef841bfaf5f0764404946 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:30:29,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:30:29,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:30:29,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:30:29,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:30:29,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:30:29,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:30:29,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:30:29,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:30:29,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:30:29,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:30:29,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:30:29,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:30:29,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:30:29,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:30:29,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:30:29,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:30:29,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:30:29,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:30:29,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:30:29,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:30:29,985 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:30:29,987 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:30:29,988 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:30:29,992 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:30:29,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:30:29,992 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:30:29,993 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:30:29,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:30:29,994 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:30:29,995 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:30:29,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:30:29,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:30:29,997 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:30:29,998 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:30:29,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:30:30,015 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:30:30,016 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:30:30,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:30:30,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:30:30,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:30:30,018 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-06 19:30:30,037 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:30:30,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:30:30,038 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:30:30,038 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:30:30,038 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:30:30,038 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:30:30,039 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:30:30,039 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:30:30,039 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:30:30,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:30:30,039 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:30:30,040 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 19:30:30,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:30:30,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:30:30,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:30:30,040 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 19:30:30,040 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 19:30:30,040 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 19:30:30,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:30:30,041 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 19:30:30,041 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 19:30:30,041 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 19:30:30,041 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:30:30,041 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:30:30,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:30:30,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:30:30,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:30:30,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:30:30,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:30:30,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:30:30,042 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 19:30:30,042 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 19:30:30,042 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:30:30,042 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 19:30:30,043 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_71af8df6-c88a-4c4e-8ef0-0124f01521b9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38a2fba2a92db51b6a97ddc82d5dc9e2df7a8770315ef841bfaf5f0764404946 [2021-12-06 19:30:30,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:30:30,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:30:30,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:30:30,309 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:30:30,310 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:30:30,311 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i [2021-12-06 19:30:30,354 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/data/6ce9c9f4e/af6aa640af98486da3cdf265c437dd61/FLAGc84b9a30d [2021-12-06 19:30:30,798 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:30:30,798 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i [2021-12-06 19:30:30,813 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/data/6ce9c9f4e/af6aa640af98486da3cdf265c437dd61/FLAGc84b9a30d [2021-12-06 19:30:30,824 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/data/6ce9c9f4e/af6aa640af98486da3cdf265c437dd61 [2021-12-06 19:30:30,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:30:30,827 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:30:30,828 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:30:30,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:30:30,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:30:30,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:30:30" (1/1) ... [2021-12-06 19:30:30,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25b8c42e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:30, skipping insertion in model container [2021-12-06 19:30:30,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:30:30" (1/1) ... [2021-12-06 19:30:30,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:30:30,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:30:31,175 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:30:31,191 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-06 19:30:31,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:30:31,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:30:31,254 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:30:31,301 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:30:31,337 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:30:31,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:31 WrapperNode [2021-12-06 19:30:31,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:30:31,339 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:30:31,339 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:30:31,339 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:30:31,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:31" (1/1) ... [2021-12-06 19:30:31,369 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:31" (1/1) ... [2021-12-06 19:30:31,389 INFO L137 Inliner]: procedures = 166, calls = 76, calls flagged for inlining = 22, calls inlined = 4, statements flattened = 70 [2021-12-06 19:30:31,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:30:31,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:30:31,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:30:31,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:30:31,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:31" (1/1) ... [2021-12-06 19:30:31,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:31" (1/1) ... [2021-12-06 19:30:31,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:31" (1/1) ... [2021-12-06 19:30:31,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:31" (1/1) ... [2021-12-06 19:30:31,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:31" (1/1) ... [2021-12-06 19:30:31,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:31" (1/1) ... [2021-12-06 19:30:31,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:31" (1/1) ... [2021-12-06 19:30:31,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:30:31,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:30:31,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:30:31,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:30:31,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:31" (1/1) ... [2021-12-06 19:30:31,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:30:31,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:30:31,448 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:30:31,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:30:31,477 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-06 19:30:31,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-06 19:30:31,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 19:30:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:30:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 19:30:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 19:30:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 19:30:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 19:30:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:30:31,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:30:31,555 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:30:31,556 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:30:31,780 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:30:31,787 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:30:31,787 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 19:30:31,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:30:31 BoogieIcfgContainer [2021-12-06 19:30:31,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:30:31,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:30:31,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:30:31,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:30:31,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:30:30" (1/3) ... [2021-12-06 19:30:31,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b030759 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:30:31, skipping insertion in model container [2021-12-06 19:30:31,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:31" (2/3) ... [2021-12-06 19:30:31,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b030759 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:30:31, skipping insertion in model container [2021-12-06 19:30:31,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:30:31" (3/3) ... [2021-12-06 19:30:31,797 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test17_3.i [2021-12-06 19:30:31,803 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:30:31,803 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-12-06 19:30:31,837 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:30:31,842 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 19:30:31,842 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-12-06 19:30:31,854 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 48 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:30:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 19:30:31,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:31,860 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:31,860 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:30:31,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:31,868 INFO L85 PathProgramCache]: Analyzing trace with hash 714233942, now seen corresponding path program 1 times [2021-12-06 19:30:31,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:30:31,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720227839] [2021-12-06 19:30:31,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:31,878 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:30:31,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:30:31,879 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:30:31,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 19:30:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:31,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:30:31,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:30:31,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:30:31,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:30:31,997 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:30:31,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720227839] [2021-12-06 19:30:31,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720227839] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:30:31,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:30:31,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:30:32,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116913111] [2021-12-06 19:30:32,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:30:32,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:30:32,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:30:32,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:30:32,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:30:32,034 INFO L87 Difference]: Start difference. First operand has 52 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 48 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 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 19:30:32,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:30:32,133 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2021-12-06 19:30:32,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:30:32,135 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 19:30:32,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:30:32,144 INFO L225 Difference]: With dead ends: 98 [2021-12-06 19:30:32,144 INFO L226 Difference]: Without dead ends: 94 [2021-12-06 19:30:32,146 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 19:30:32,149 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 46 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:30:32,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 202 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:30:32,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-06 19:30:32,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 54. [2021-12-06 19:30:32,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 49 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 19:30:32,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-12-06 19:30:32,179 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 11 [2021-12-06 19:30:32,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:30:32,179 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-12-06 19:30:32,179 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 19:30:32,179 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-12-06 19:30:32,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 19:30:32,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:32,180 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:32,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:30:32,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:30:32,383 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:30:32,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:32,385 INFO L85 PathProgramCache]: Analyzing trace with hash 714155687, now seen corresponding path program 1 times [2021-12-06 19:30:32,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:30:32,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764207069] [2021-12-06 19:30:32,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:32,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:30:32,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:30:32,391 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:30:32,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 19:30:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:32,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:30:32,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:30:32,527 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 19:30:32,559 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 19:30:32,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:30:32,559 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:30:32,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764207069] [2021-12-06 19:30:32,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764207069] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:30:32,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:30:32,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:30:32,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734308964] [2021-12-06 19:30:32,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:30:32,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:30:32,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:30:32,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:30:32,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:30:32,562 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 5 states, 4 states have (on average 2.25) 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 19:30:32,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:30:32,694 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2021-12-06 19:30:32,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:30:32,695 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) 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 19:30:32,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:30:32,696 INFO L225 Difference]: With dead ends: 67 [2021-12-06 19:30:32,696 INFO L226 Difference]: Without dead ends: 67 [2021-12-06 19:30:32,696 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 19:30:32,698 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 13 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:30:32,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 140 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:30:32,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-06 19:30:32,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2021-12-06 19:30:32,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 58 states have internal predecessors, (69), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 19:30:32,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2021-12-06 19:30:32,707 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 11 [2021-12-06 19:30:32,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:30:32,707 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2021-12-06 19:30:32,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) 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 19:30:32,707 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2021-12-06 19:30:32,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 19:30:32,708 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:32,708 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:32,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 19:30:32,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:30:32,910 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:30:32,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:32,912 INFO L85 PathProgramCache]: Analyzing trace with hash 714155688, now seen corresponding path program 1 times [2021-12-06 19:30:32,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:30:32,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [129865396] [2021-12-06 19:30:32,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:32,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:30:32,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:30:32,919 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:30:32,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 19:30:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:33,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 19:30:33,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:30:33,023 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 19:30:33,106 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 19:30:33,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:30:33,106 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:30:33,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [129865396] [2021-12-06 19:30:33,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [129865396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:30:33,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:30:33,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:30:33,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788807464] [2021-12-06 19:30:33,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:30:33,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:30:33,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:30:33,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:30:33,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:30:33,108 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 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 19:30:33,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:30:33,332 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2021-12-06 19:30:33,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:30:33,332 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), 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 19:30:33,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:30:33,333 INFO L225 Difference]: With dead ends: 82 [2021-12-06 19:30:33,333 INFO L226 Difference]: Without dead ends: 82 [2021-12-06 19:30:33,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:30:33,335 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 73 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:30:33,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 226 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:30:33,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-06 19:30:33,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2021-12-06 19:30:33,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.5185185185185186) internal successors, (82), 68 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 19:30:33,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2021-12-06 19:30:33,341 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 11 [2021-12-06 19:30:33,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:30:33,342 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2021-12-06 19:30:33,342 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), 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 19:30:33,342 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2021-12-06 19:30:33,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 19:30:33,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:33,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:33,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-06 19:30:33,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:30:33,544 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:30:33,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:33,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1601737623, now seen corresponding path program 1 times [2021-12-06 19:30:33,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:30:33,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112774767] [2021-12-06 19:30:33,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:33,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:30:33,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:30:33,551 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:30:33,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 19:30:33,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:33,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:30:33,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:30:33,667 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 19:30:33,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:30:33,668 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:30:33,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112774767] [2021-12-06 19:30:33,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112774767] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:30:33,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:30:33,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:30:33,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156566277] [2021-12-06 19:30:33,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:30:33,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:30:33,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:30:33,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:30:33,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:30:33,669 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (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 19:30:33,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:30:33,754 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2021-12-06 19:30:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:30:33,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (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 19:30:33,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:30:33,756 INFO L225 Difference]: With dead ends: 106 [2021-12-06 19:30:33,756 INFO L226 Difference]: Without dead ends: 104 [2021-12-06 19:30:33,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:30:33,757 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 36 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:30:33,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 165 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:30:33,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-06 19:30:33,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2021-12-06 19:30:33,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.5) internal successors, (81), 68 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 19:30:33,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2021-12-06 19:30:33,764 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 11 [2021-12-06 19:30:33,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:30:33,764 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2021-12-06 19:30:33,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (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 19:30:33,764 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2021-12-06 19:30:33,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 19:30:33,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:33,765 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:33,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-06 19:30:33,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:30:33,967 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:30:33,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:33,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1601659368, now seen corresponding path program 1 times [2021-12-06 19:30:33,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:30:33,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961965410] [2021-12-06 19:30:33,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:33,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:30:33,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:30:33,973 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:30:33,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 19:30:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:34,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 19:30:34,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:30:34,131 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 19:30:34,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:30:34,132 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:30:34,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961965410] [2021-12-06 19:30:34,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961965410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:30:34,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:30:34,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:30:34,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592181320] [2021-12-06 19:30:34,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:30:34,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:30:34,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:30:34,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:30:34,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:30:34,133 INFO L87 Difference]: Start difference. First operand 73 states and 87 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 19:30:34,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:30:34,157 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2021-12-06 19:30:34,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:30:34,157 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 19:30:34,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:30:34,158 INFO L225 Difference]: With dead ends: 61 [2021-12-06 19:30:34,158 INFO L226 Difference]: Without dead ends: 59 [2021-12-06 19:30:34,158 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 19:30:34,159 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:30:34,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 210 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:30:34,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-06 19:30:34,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-12-06 19:30:34,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 19:30:34,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-12-06 19:30:34,164 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 11 [2021-12-06 19:30:34,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:30:34,164 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-12-06 19:30:34,164 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 19:30:34,164 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-12-06 19:30:34,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 19:30:34,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:34,165 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:34,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-06 19:30:34,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:30:34,366 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:30:34,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:34,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1855917097, now seen corresponding path program 1 times [2021-12-06 19:30:34,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:30:34,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [70050525] [2021-12-06 19:30:34,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:34,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:30:34,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:30:34,370 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:30:34,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 19:30:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:34,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 19:30:34,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:30:34,468 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 19:30:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:30:34,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:30:35,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:30:35,255 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:30:35,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [70050525] [2021-12-06 19:30:35,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [70050525] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:30:35,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:30:35,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-12-06 19:30:35,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711922617] [2021-12-06 19:30:35,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:30:35,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 19:30:35,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:30:35,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 19:30:35,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:30:35,257 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:30:36,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:30:36,020 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2021-12-06 19:30:36,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 19:30:36,021 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2021-12-06 19:30:36,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:30:36,022 INFO L225 Difference]: With dead ends: 97 [2021-12-06 19:30:36,022 INFO L226 Difference]: Without dead ends: 97 [2021-12-06 19:30:36,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-12-06 19:30:36,023 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 227 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:30:36,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 267 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 180 Invalid, 0 Unknown, 81 Unchecked, 0.5s Time] [2021-12-06 19:30:36,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-06 19:30:36,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2021-12-06 19:30:36,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.44) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 19:30:36,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2021-12-06 19:30:36,028 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 14 [2021-12-06 19:30:36,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:30:36,029 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2021-12-06 19:30:36,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:30:36,029 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2021-12-06 19:30:36,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 19:30:36,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:36,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:36,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-06 19:30:36,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:30:36,234 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:30:36,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:36,236 INFO L85 PathProgramCache]: Analyzing trace with hash 854181427, now seen corresponding path program 1 times [2021-12-06 19:30:36,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:30:36,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [804332774] [2021-12-06 19:30:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:36,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:30:36,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:30:36,239 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:30:36,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 19:30:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:36,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:30:36,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:30:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:30:36,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:30:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:30:36,430 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:30:36,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [804332774] [2021-12-06 19:30:36,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [804332774] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:30:36,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:30:36,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-06 19:30:36,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995519406] [2021-12-06 19:30:36,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:30:36,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 19:30:36,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:30:36,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 19:30:36,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:30:36,432 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:30:36,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:30:36,559 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2021-12-06 19:30:36,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:30:36,560 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-12-06 19:30:36,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:30:36,560 INFO L225 Difference]: With dead ends: 74 [2021-12-06 19:30:36,560 INFO L226 Difference]: Without dead ends: 74 [2021-12-06 19:30:36,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:30:36,561 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 67 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:30:36,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 238 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:30:36,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-06 19:30:36,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-12-06 19:30:36,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 69 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 19:30:36,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2021-12-06 19:30:36,566 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 22 [2021-12-06 19:30:36,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:30:36,566 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2021-12-06 19:30:36,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:30:36,566 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2021-12-06 19:30:36,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 19:30:36,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:36,567 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:36,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-06 19:30:36,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:30:36,768 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:30:36,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:36,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1071704552, now seen corresponding path program 2 times [2021-12-06 19:30:36,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:30:36,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1630596890] [2021-12-06 19:30:36,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:30:36,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:30:36,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:30:36,775 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:30:36,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 19:30:36,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:30:36,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:30:36,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 19:30:36,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:30:36,895 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 19:30:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:30:37,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:30:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:30:38,891 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:30:38,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1630596890] [2021-12-06 19:30:38,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1630596890] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:30:38,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:30:38,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-12-06 19:30:38,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77654808] [2021-12-06 19:30:38,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:30:38,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 19:30:38,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:30:38,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 19:30:38,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-12-06 19:30:38,893 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 22 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:30:41,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:30:41,542 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2021-12-06 19:30:41,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 19:30:41,543 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 22 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-12-06 19:30:41,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:30:41,544 INFO L225 Difference]: With dead ends: 91 [2021-12-06 19:30:41,544 INFO L226 Difference]: Without dead ends: 91 [2021-12-06 19:30:41,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 19:30:41,545 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 314 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:30:41,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 403 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 364 Invalid, 0 Unknown, 85 Unchecked, 1.0s Time] [2021-12-06 19:30:41,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-06 19:30:41,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2021-12-06 19:30:41,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 82 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 19:30:41,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 97 transitions. [2021-12-06 19:30:41,550 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 97 transitions. Word has length 23 [2021-12-06 19:30:41,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:30:41,550 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 97 transitions. [2021-12-06 19:30:41,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 22 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:30:41,551 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 97 transitions. [2021-12-06 19:30:41,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 19:30:41,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:41,552 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:41,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-06 19:30:41,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:30:41,754 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:30:41,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:41,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1134263027, now seen corresponding path program 2 times [2021-12-06 19:30:41,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:30:41,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186941226] [2021-12-06 19:30:41,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:30:41,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:30:41,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:30:41,758 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:30:41,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 19:30:41,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 19:30:41,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:30:41,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:30:41,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:30:41,861 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-06 19:30:41,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:30:41,862 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:30:41,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186941226] [2021-12-06 19:30:41,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186941226] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:30:41,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:30:41,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:30:41,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767373974] [2021-12-06 19:30:41,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:30:41,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:30:41,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:30:41,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:30:41,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:30:41,863 INFO L87 Difference]: Start difference. First operand 86 states and 97 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 19:30:41,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:30:41,905 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2021-12-06 19:30:41,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:30:41,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 34 [2021-12-06 19:30:41,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:30:41,907 INFO L225 Difference]: With dead ends: 114 [2021-12-06 19:30:41,907 INFO L226 Difference]: Without dead ends: 114 [2021-12-06 19:30:41,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:30:41,907 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 104 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:30:41,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 99 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:30:41,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-06 19:30:41,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 81. [2021-12-06 19:30:41,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 77 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 19:30:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2021-12-06 19:30:41,912 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 34 [2021-12-06 19:30:41,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:30:41,912 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2021-12-06 19:30:41,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 19:30:41,912 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2021-12-06 19:30:41,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 19:30:41,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:41,913 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:41,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-06 19:30:42,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:30:42,115 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:30:42,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:42,116 INFO L85 PathProgramCache]: Analyzing trace with hash 269265368, now seen corresponding path program 1 times [2021-12-06 19:30:42,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:30:42,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439320017] [2021-12-06 19:30:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:42,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:30:42,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:30:42,121 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:30:42,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 19:30:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:42,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 19:30:42,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:30:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:30:42,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:30:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:30:42,666 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:30:42,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439320017] [2021-12-06 19:30:42,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439320017] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:30:42,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:30:42,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-06 19:30:42,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501517258] [2021-12-06 19:30:42,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:30:42,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 19:30:42,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:30:42,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 19:30:42,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-12-06 19:30:42,668 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 19:30:42,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:30:42,919 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-12-06 19:30:42,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 19:30:42,920 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-12-06 19:30:42,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:30:42,920 INFO L225 Difference]: With dead ends: 81 [2021-12-06 19:30:42,921 INFO L226 Difference]: Without dead ends: 81 [2021-12-06 19:30:42,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2021-12-06 19:30:42,921 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 84 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:30:42,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 370 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:30:42,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-06 19:30:42,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-12-06 19:30:42,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 77 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 19:30:42,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2021-12-06 19:30:42,925 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 38 [2021-12-06 19:30:42,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:30:42,925 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2021-12-06 19:30:42,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 19:30:42,925 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2021-12-06 19:30:42,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 19:30:42,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:42,926 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:42,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-06 19:30:43,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:30:43,128 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:30:43,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:43,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1255484104, now seen corresponding path program 3 times [2021-12-06 19:30:43,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:30:43,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151510168] [2021-12-06 19:30:43,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:30:43,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:30:43,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:30:43,135 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:30:43,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 19:30:43,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-06 19:30:43,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:30:43,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 19:30:43,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:30:43,322 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 19:30:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:30:43,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:30:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:30:47,942 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:30:47,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151510168] [2021-12-06 19:30:47,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151510168] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:30:47,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:30:47,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-12-06 19:30:47,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924330518] [2021-12-06 19:30:47,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:30:47,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 19:30:47,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:30:47,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 19:30:47,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 19:30:47,944 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 35 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:30:52,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:30:52,410 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2021-12-06 19:30:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 19:30:52,411 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2021-12-06 19:30:52,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:30:52,412 INFO L225 Difference]: With dead ends: 115 [2021-12-06 19:30:52,412 INFO L226 Difference]: Without dead ends: 115 [2021-12-06 19:30:52,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=301, Invalid=1031, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 19:30:52,413 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 699 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:30:52,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 629 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 837 Invalid, 0 Unknown, 109 Unchecked, 2.2s Time] [2021-12-06 19:30:52,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-06 19:30:52,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 79. [2021-12-06 19:30:52,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 19:30:52,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2021-12-06 19:30:52,416 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 41 [2021-12-06 19:30:52,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:30:52,417 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2021-12-06 19:30:52,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:30:52,417 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2021-12-06 19:30:52,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 19:30:52,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:52,418 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:52,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-06 19:30:52,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:30:52,619 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:30:52,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:52,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1908613480, now seen corresponding path program 2 times [2021-12-06 19:30:52,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:30:52,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355526851] [2021-12-06 19:30:52,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:30:52,623 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:30:52,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:30:52,626 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:30:52,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-06 19:30:52,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:30:52,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:30:52,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 19:30:52,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:30:52,798 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 19:30:52,802 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 19:30:53,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:30:53,115 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 19:30:53,122 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:30:53,123 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 19:30:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-06 19:30:53,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:30:55,594 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:30:55,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355526851] [2021-12-06 19:30:55,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355526851] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:30:55,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [281725513] [2021-12-06 19:30:55,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:30:55,595 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 19:30:55,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 19:30:55,595 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 19:30:55,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-12-06 19:30:55,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:30:55,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:30:55,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 19:30:55,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:30:55,879 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 19:30:55,884 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 19:30:56,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:30:56,222 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 19:30:56,230 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:30:56,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 19:30:56,248 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-06 19:30:56,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:30:56,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [281725513] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:30:56,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:30:56,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-12-06 19:30:56,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738666952] [2021-12-06 19:30:56,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:30:56,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 19:30:56,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:30:56,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 19:30:56,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=128, Unknown=1, NotChecked=0, Total=156 [2021-12-06 19:30:56,580 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:30:57,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:30:57,101 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2021-12-06 19:30:57,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 19:30:57,102 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2021-12-06 19:30:57,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:30:57,103 INFO L225 Difference]: With dead ends: 168 [2021-12-06 19:30:57,103 INFO L226 Difference]: Without dead ends: 168 [2021-12-06 19:30:57,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=43, Invalid=196, Unknown=1, NotChecked=0, Total=240 [2021-12-06 19:30:57,104 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 92 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:30:57,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 457 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 375 Invalid, 0 Unknown, 52 Unchecked, 0.4s Time] [2021-12-06 19:30:57,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-06 19:30:57,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 112. [2021-12-06 19:30:57,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 93 states have (on average 1.3870967741935485) internal successors, (129), 105 states have internal predecessors, (129), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 19:30:57,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 140 transitions. [2021-12-06 19:30:57,111 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 140 transitions. Word has length 50 [2021-12-06 19:30:57,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:30:57,111 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 140 transitions. [2021-12-06 19:30:57,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:30:57,112 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 140 transitions. [2021-12-06 19:30:57,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 19:30:57,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:57,113 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:57,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-06 19:30:57,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-12-06 19:30:57,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 19:30:57,515 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:30:57,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:57,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1908613481, now seen corresponding path program 1 times [2021-12-06 19:30:57,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:30:57,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927992409] [2021-12-06 19:30:57,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:57,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:30:57,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:30:57,522 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:30:57,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 19:30:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:57,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 19:30:57,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:30:57,644 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 19:30:57,769 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 19:30:57,769 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 20 treesize of output 25 [2021-12-06 19:30:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-06 19:30:57,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:30:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-06 19:30:57,995 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:30:57,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927992409] [2021-12-06 19:30:57,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927992409] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:30:57,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:30:57,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-12-06 19:30:57,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625910119] [2021-12-06 19:30:57,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:30:57,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 19:30:57,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:30:57,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 19:30:57,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:30:57,996 INFO L87 Difference]: Start difference. First operand 112 states and 140 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 19:30:58,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:30:58,228 INFO L93 Difference]: Finished difference Result 124 states and 151 transitions. [2021-12-06 19:30:58,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:30:58,229 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2021-12-06 19:30:58,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:30:58,230 INFO L225 Difference]: With dead ends: 124 [2021-12-06 19:30:58,230 INFO L226 Difference]: Without dead ends: 124 [2021-12-06 19:30:58,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:30:58,230 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 51 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:30:58,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 311 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2021-12-06 19:30:58,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-06 19:30:58,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 98. [2021-12-06 19:30:58,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 81 states have (on average 1.2592592592592593) internal successors, (102), 91 states have internal predecessors, (102), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 19:30:58,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 113 transitions. [2021-12-06 19:30:58,234 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 113 transitions. Word has length 50 [2021-12-06 19:30:58,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:30:58,234 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 113 transitions. [2021-12-06 19:30:58,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 19:30:58,234 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 113 transitions. [2021-12-06 19:30:58,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 19:30:58,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:58,235 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:58,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-06 19:30:58,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:30:58,436 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:30:58,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:58,438 INFO L85 PathProgramCache]: Analyzing trace with hash -226568731, now seen corresponding path program 1 times [2021-12-06 19:30:58,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:30:58,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932691715] [2021-12-06 19:30:58,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:58,440 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:30:58,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:30:58,442 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:30:58,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-06 19:30:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:58,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:30:58,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:30:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-06 19:30:58,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:30:58,598 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:30:58,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932691715] [2021-12-06 19:30:58,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932691715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:30:58,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:30:58,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:30:58,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345146983] [2021-12-06 19:30:58,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:30:58,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:30:58,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:30:58,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:30:58,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:30:58,599 INFO L87 Difference]: Start difference. First operand 98 states and 113 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 19:30:58,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:30:58,633 INFO L93 Difference]: Finished difference Result 118 states and 134 transitions. [2021-12-06 19:30:58,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:30:58,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2021-12-06 19:30:58,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:30:58,635 INFO L225 Difference]: With dead ends: 118 [2021-12-06 19:30:58,635 INFO L226 Difference]: Without dead ends: 118 [2021-12-06 19:30:58,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 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 19:30:58,635 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 16 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:30:58,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 197 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:30:58,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-06 19:30:58,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2021-12-06 19:30:58,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 92 states have internal predecessors, (103), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 19:30:58,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2021-12-06 19:30:58,639 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 52 [2021-12-06 19:30:58,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:30:58,639 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2021-12-06 19:30:58,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 19:30:58,639 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2021-12-06 19:30:58,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 19:30:58,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:58,639 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:58,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-06 19:30:58,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:30:58,841 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:30:58,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:58,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1516241604, now seen corresponding path program 1 times [2021-12-06 19:30:58,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:30:58,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797998139] [2021-12-06 19:30:58,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:58,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:30:58,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:30:58,845 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:30:58,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-06 19:30:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:58,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:30:58,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:30:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-06 19:30:59,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:30:59,003 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:30:59,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797998139] [2021-12-06 19:30:59,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797998139] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:30:59,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:30:59,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:30:59,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640849822] [2021-12-06 19:30:59,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:30:59,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:30:59,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:30:59,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:30:59,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:30:59,004 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:30:59,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:30:59,069 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2021-12-06 19:30:59,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:30:59,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2021-12-06 19:30:59,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:30:59,071 INFO L225 Difference]: With dead ends: 113 [2021-12-06 19:30:59,071 INFO L226 Difference]: Without dead ends: 113 [2021-12-06 19:30:59,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:30:59,071 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 21 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:30:59,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 138 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:30:59,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-06 19:30:59,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2021-12-06 19:30:59,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 94 states have internal predecessors, (105), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 19:30:59,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2021-12-06 19:30:59,075 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 52 [2021-12-06 19:30:59,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:30:59,075 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2021-12-06 19:30:59,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:30:59,075 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2021-12-06 19:30:59,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 19:30:59,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:59,075 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:59,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-06 19:30:59,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:30:59,277 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:30:59,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:59,278 INFO L85 PathProgramCache]: Analyzing trace with hash -840525585, now seen corresponding path program 1 times [2021-12-06 19:30:59,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:30:59,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599080987] [2021-12-06 19:30:59,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:59,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:30:59,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:30:59,282 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:30:59,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-06 19:30:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:59,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 19:30:59,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:30:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-06 19:30:59,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:30:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-06 19:30:59,620 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:30:59,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599080987] [2021-12-06 19:30:59,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599080987] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:30:59,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:30:59,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-06 19:30:59,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956484308] [2021-12-06 19:30:59,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:30:59,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:30:59,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:30:59,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:30:59,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:30:59,622 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 19:30:59,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:30:59,756 INFO L93 Difference]: Finished difference Result 223 states and 254 transitions. [2021-12-06 19:30:59,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:30:59,757 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 55 [2021-12-06 19:30:59,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:30:59,758 INFO L225 Difference]: With dead ends: 223 [2021-12-06 19:30:59,758 INFO L226 Difference]: Without dead ends: 223 [2021-12-06 19:30:59,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:30:59,759 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 274 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:30:59,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 219 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:30:59,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-12-06 19:30:59,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 134. [2021-12-06 19:30:59,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 113 states have (on average 1.247787610619469) internal successors, (141), 120 states have internal predecessors, (141), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-06 19:30:59,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 164 transitions. [2021-12-06 19:30:59,764 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 164 transitions. Word has length 55 [2021-12-06 19:30:59,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:30:59,764 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 164 transitions. [2021-12-06 19:30:59,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 19:30:59,764 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 164 transitions. [2021-12-06 19:30:59,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 19:30:59,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:59,764 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:59,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-06 19:30:59,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:30:59,966 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:30:59,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:59,967 INFO L85 PathProgramCache]: Analyzing trace with hash 181256032, now seen corresponding path program 1 times [2021-12-06 19:30:59,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:30:59,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306258923] [2021-12-06 19:30:59,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:59,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:30:59,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:30:59,971 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:30:59,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-06 19:31:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:00,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 19:31:00,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-06 19:31:00,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-06 19:31:00,616 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:31:00,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306258923] [2021-12-06 19:31:00,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [306258923] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:31:00,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:31:00,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-06 19:31:00,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257108672] [2021-12-06 19:31:00,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:00,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 19:31:00,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:31:00,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 19:31:00,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:31:00,617 INFO L87 Difference]: Start difference. First operand 134 states and 164 transitions. Second operand has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 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 19:31:00,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:00,723 INFO L93 Difference]: Finished difference Result 137 states and 166 transitions. [2021-12-06 19:31:00,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:31:00,724 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 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 55 [2021-12-06 19:31:00,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:00,725 INFO L225 Difference]: With dead ends: 137 [2021-12-06 19:31:00,725 INFO L226 Difference]: Without dead ends: 135 [2021-12-06 19:31:00,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:31:00,726 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 81 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:00,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 192 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2021-12-06 19:31:00,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-06 19:31:00,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-12-06 19:31:00,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 115 states have (on average 1.2260869565217392) internal successors, (141), 120 states have internal predecessors, (141), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-06 19:31:00,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 164 transitions. [2021-12-06 19:31:00,731 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 164 transitions. Word has length 55 [2021-12-06 19:31:00,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:00,731 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 164 transitions. [2021-12-06 19:31:00,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 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 19:31:00,731 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 164 transitions. [2021-12-06 19:31:00,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 19:31:00,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:00,732 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:00,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-06 19:31:00,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:31:00,934 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:31:00,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:00,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1024677531, now seen corresponding path program 1 times [2021-12-06 19:31:00,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:31:00,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035198562] [2021-12-06 19:31:00,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:00,938 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:31:00,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:31:00,939 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:31:00,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-06 19:31:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:01,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 19:31:01,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-06 19:31:01,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:05,590 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:31:05,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035198562] [2021-12-06 19:31:05,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1035198562] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:05,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [854309716] [2021-12-06 19:31:05,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:05,590 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 19:31:05,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 19:31:05,591 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 19:31:05,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-12-06 19:31:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:05,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 19:31:05,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-06 19:31:06,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:10,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [854309716] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:10,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:31:10,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-12-06 19:31:10,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643997110] [2021-12-06 19:31:10,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:10,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 19:31:10,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:31:10,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 19:31:10,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=166, Unknown=2, NotChecked=0, Total=210 [2021-12-06 19:31:10,338 INFO L87 Difference]: Start difference. First operand 135 states and 164 transitions. Second operand has 12 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 19:31:10,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:10,418 INFO L93 Difference]: Finished difference Result 148 states and 174 transitions. [2021-12-06 19:31:10,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:31:10,418 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 58 [2021-12-06 19:31:10,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:10,419 INFO L225 Difference]: With dead ends: 148 [2021-12-06 19:31:10,419 INFO L226 Difference]: Without dead ends: 138 [2021-12-06 19:31:10,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 200 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=50, Invalid=220, Unknown=2, NotChecked=0, Total=272 [2021-12-06 19:31:10,420 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 19 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:10,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 362 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 118 Unchecked, 0.1s Time] [2021-12-06 19:31:10,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-06 19:31:10,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 124. [2021-12-06 19:31:10,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 103 states have (on average 1.203883495145631) internal successors, (124), 110 states have internal predecessors, (124), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-06 19:31:10,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2021-12-06 19:31:10,426 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 58 [2021-12-06 19:31:10,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:10,426 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2021-12-06 19:31:10,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 19:31:10,426 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2021-12-06 19:31:10,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-06 19:31:10,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:10,427 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:10,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-12-06 19:31:10,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-06 19:31:10,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:31:10,829 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:31:10,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:10,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1043028556, now seen corresponding path program 1 times [2021-12-06 19:31:10,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:31:10,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697552955] [2021-12-06 19:31:10,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:10,833 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:31:10,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:31:10,834 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:31:10,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-06 19:31:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:11,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 19:31:11,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:11,018 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 19:31:11,024 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 19:31:11,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:11,334 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 19:31:11,342 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:31:11,343 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 19:31:11,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:11,493 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 19:31:11,501 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:31:11,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 19:31:11,534 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-06 19:31:11,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:14,028 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:31:14,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697552955] [2021-12-06 19:31:14,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697552955] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:14,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [473538153] [2021-12-06 19:31:14,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:14,029 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 19:31:14,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 19:31:14,029 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 19:31:14,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-12-06 19:31:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:14,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 19:31:14,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:14,374 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 19:31:14,379 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 19:31:14,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:14,646 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 19:31:14,655 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:31:14,655 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 25 [2021-12-06 19:31:14,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:14,767 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 19:31:14,774 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:31:14,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 19:31:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-06 19:31:14,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:15,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [473538153] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:15,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:31:15,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-12-06 19:31:15,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358123370] [2021-12-06 19:31:15,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:15,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 19:31:15,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:31:15,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 19:31:15,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=174, Unknown=1, NotChecked=0, Total=210 [2021-12-06 19:31:15,148 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 19:31:15,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:15,683 INFO L93 Difference]: Finished difference Result 168 states and 188 transitions. [2021-12-06 19:31:15,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 19:31:15,684 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 60 [2021-12-06 19:31:15,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:15,685 INFO L225 Difference]: With dead ends: 168 [2021-12-06 19:31:15,685 INFO L226 Difference]: Without dead ends: 168 [2021-12-06 19:31:15,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=58, Invalid=283, Unknown=1, NotChecked=0, Total=342 [2021-12-06 19:31:15,686 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 69 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:15,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 425 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 390 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2021-12-06 19:31:15,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-06 19:31:15,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 124. [2021-12-06 19:31:15,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 103 states have (on average 1.1844660194174756) internal successors, (122), 110 states have internal predecessors, (122), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-06 19:31:15,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 145 transitions. [2021-12-06 19:31:15,690 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 145 transitions. Word has length 60 [2021-12-06 19:31:15,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:15,690 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 145 transitions. [2021-12-06 19:31:15,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 19:31:15,690 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 145 transitions. [2021-12-06 19:31:15,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 19:31:15,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:15,691 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:15,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-12-06 19:31:15,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-06 19:31:16,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:31:16,091 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:31:16,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:16,092 INFO L85 PathProgramCache]: Analyzing trace with hash -929144456, now seen corresponding path program 1 times [2021-12-06 19:31:16,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:31:16,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513597224] [2021-12-06 19:31:16,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:16,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:31:16,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:31:16,093 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:31:16,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-06 19:31:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:16,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 19:31:16,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-06 19:31:16,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:17,174 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 19:31:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-06 19:31:17,816 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:31:17,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513597224] [2021-12-06 19:31:17,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513597224] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:31:17,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:31:17,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-12-06 19:31:17,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160092021] [2021-12-06 19:31:17,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:17,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 19:31:17,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:31:17,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 19:31:17,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-12-06 19:31:17,818 INFO L87 Difference]: Start difference. First operand 124 states and 145 transitions. Second operand has 18 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 19:31:20,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:20,484 INFO L93 Difference]: Finished difference Result 227 states and 254 transitions. [2021-12-06 19:31:20,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 19:31:20,485 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 62 [2021-12-06 19:31:20,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:20,486 INFO L225 Difference]: With dead ends: 227 [2021-12-06 19:31:20,486 INFO L226 Difference]: Without dead ends: 227 [2021-12-06 19:31:20,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-12-06 19:31:20,487 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 380 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:20,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 378 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 242 Invalid, 0 Unknown, 51 Unchecked, 1.1s Time] [2021-12-06 19:31:20,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-06 19:31:20,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 128. [2021-12-06 19:31:20,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 113 states have internal predecessors, (127), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-06 19:31:20,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 150 transitions. [2021-12-06 19:31:20,491 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 150 transitions. Word has length 62 [2021-12-06 19:31:20,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:20,492 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 150 transitions. [2021-12-06 19:31:20,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 19:31:20,492 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 150 transitions. [2021-12-06 19:31:20,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 19:31:20,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:20,492 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:20,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-06 19:31:20,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:31:20,694 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:31:20,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:20,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1261292942, now seen corresponding path program 1 times [2021-12-06 19:31:20,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:31:20,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188372298] [2021-12-06 19:31:20,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:20,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:31:20,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:31:20,699 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:31:20,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-06 19:31:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:20,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 19:31:20,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:20,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:31:21,090 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 19:31:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-06 19:31:21,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:21,303 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 19:31:21,304 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:31:21,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188372298] [2021-12-06 19:31:21,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188372298] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:31:21,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:31:21,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2021-12-06 19:31:21,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50021486] [2021-12-06 19:31:21,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:21,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 19:31:21,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:31:21,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 19:31:21,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-12-06 19:31:21,305 INFO L87 Difference]: Start difference. First operand 128 states and 150 transitions. Second operand has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 19:31:22,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:22,300 INFO L93 Difference]: Finished difference Result 182 states and 202 transitions. [2021-12-06 19:31:22,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 19:31:22,300 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 63 [2021-12-06 19:31:22,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:22,301 INFO L225 Difference]: With dead ends: 182 [2021-12-06 19:31:22,302 INFO L226 Difference]: Without dead ends: 182 [2021-12-06 19:31:22,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 19:31:22,303 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 256 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:22,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 432 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 309 Invalid, 0 Unknown, 37 Unchecked, 0.4s Time] [2021-12-06 19:31:22,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-06 19:31:22,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 135. [2021-12-06 19:31:22,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 113 states have (on average 1.176991150442478) internal successors, (133), 119 states have internal predecessors, (133), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-06 19:31:22,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 156 transitions. [2021-12-06 19:31:22,307 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 156 transitions. Word has length 63 [2021-12-06 19:31:22,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:22,307 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 156 transitions. [2021-12-06 19:31:22,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 19:31:22,307 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 156 transitions. [2021-12-06 19:31:22,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 19:31:22,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:22,308 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:22,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-12-06 19:31:22,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:31:22,509 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:31:22,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:22,511 INFO L85 PathProgramCache]: Analyzing trace with hash 445375639, now seen corresponding path program 1 times [2021-12-06 19:31:22,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:31:22,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362819676] [2021-12-06 19:31:22,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:22,513 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:31:22,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:31:22,514 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:31:22,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-06 19:31:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:22,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 19:31:22,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:23,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:31:23,650 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 19:31:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-06 19:31:23,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 19:31:24,111 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:31:24,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362819676] [2021-12-06 19:31:24,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362819676] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:31:24,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:31:24,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 22 [2021-12-06 19:31:24,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305675438] [2021-12-06 19:31:24,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:24,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 19:31:24,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:31:24,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 19:31:24,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-12-06 19:31:24,113 INFO L87 Difference]: Start difference. First operand 135 states and 156 transitions. Second operand has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 20 states have internal predecessors, (59), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 19:31:24,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:24,388 INFO L93 Difference]: Finished difference Result 197 states and 223 transitions. [2021-12-06 19:31:24,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 19:31:24,389 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 20 states have internal predecessors, (59), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 64 [2021-12-06 19:31:24,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:24,390 INFO L225 Difference]: With dead ends: 197 [2021-12-06 19:31:24,390 INFO L226 Difference]: Without dead ends: 197 [2021-12-06 19:31:24,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-12-06 19:31:24,391 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 40 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:24,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 446 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 78 Unchecked, 0.1s Time] [2021-12-06 19:31:24,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-06 19:31:24,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 169. [2021-12-06 19:31:24,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 141 states have (on average 1.198581560283688) internal successors, (169), 149 states have internal predecessors, (169), 10 states have call successors, (10), 6 states have call predecessors, (10), 10 states have return successors, (19), 13 states have call predecessors, (19), 10 states have call successors, (19) [2021-12-06 19:31:24,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 198 transitions. [2021-12-06 19:31:24,395 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 198 transitions. Word has length 64 [2021-12-06 19:31:24,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:24,396 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 198 transitions. [2021-12-06 19:31:24,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 20 states have internal predecessors, (59), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 19:31:24,396 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 198 transitions. [2021-12-06 19:31:24,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 19:31:24,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:24,396 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:24,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-12-06 19:31:24,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:31:24,598 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:31:24,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:24,599 INFO L85 PathProgramCache]: Analyzing trace with hash 36551414, now seen corresponding path program 2 times [2021-12-06 19:31:24,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:31:24,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579623245] [2021-12-06 19:31:24,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:31:24,601 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:31:24,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:31:24,602 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:31:24,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-06 19:31:24,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:31:24,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:31:24,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 19:31:24,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-06 19:31:24,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:31:24,831 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:31:24,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579623245] [2021-12-06 19:31:24,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579623245] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:31:24,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:31:24,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:31:24,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835743330] [2021-12-06 19:31:24,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:31:24,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:31:24,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:31:24,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:31:24,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:31:24,833 INFO L87 Difference]: Start difference. First operand 169 states and 198 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 19:31:24,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:24,852 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2021-12-06 19:31:24,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:31:24,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 64 [2021-12-06 19:31:24,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:24,853 INFO L225 Difference]: With dead ends: 128 [2021-12-06 19:31:24,853 INFO L226 Difference]: Without dead ends: 124 [2021-12-06 19:31:24,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 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 19:31:24,853 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 23 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:24,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 171 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:31:24,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-06 19:31:24,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 114. [2021-12-06 19:31:24,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 102 states have internal predecessors, (109), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-06 19:31:24,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2021-12-06 19:31:24,856 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 64 [2021-12-06 19:31:24,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:24,857 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2021-12-06 19:31:24,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 19:31:24,857 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2021-12-06 19:31:24,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 19:31:24,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:24,857 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:24,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-12-06 19:31:25,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:31:25,059 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:31:25,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:25,060 INFO L85 PathProgramCache]: Analyzing trace with hash 921743024, now seen corresponding path program 1 times [2021-12-06 19:31:25,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:31:25,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165255679] [2021-12-06 19:31:25,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:25,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:31:25,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:31:25,064 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:31:25,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-06 19:31:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:25,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 19:31:25,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:25,462 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 19:31:25,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:31:25,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-12-06 19:31:25,659 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 26 treesize of output 18 [2021-12-06 19:31:25,678 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-06 19:31:25,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-06 19:31:26,043 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:31:26,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165255679] [2021-12-06 19:31:26,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165255679] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:31:26,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:31:26,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 19 [2021-12-06 19:31:26,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364908200] [2021-12-06 19:31:26,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:26,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 19:31:26,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:31:26,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 19:31:26,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-12-06 19:31:26,044 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 19:31:27,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:27,166 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2021-12-06 19:31:27,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 19:31:27,167 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 65 [2021-12-06 19:31:27,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:27,168 INFO L225 Difference]: With dead ends: 130 [2021-12-06 19:31:27,168 INFO L226 Difference]: Without dead ends: 130 [2021-12-06 19:31:27,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 19:31:27,169 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 88 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:27,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 454 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 514 Invalid, 0 Unknown, 49 Unchecked, 0.6s Time] [2021-12-06 19:31:27,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-06 19:31:27,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 115. [2021-12-06 19:31:27,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 97 states have (on average 1.134020618556701) internal successors, (110), 103 states have internal predecessors, (110), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-06 19:31:27,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 123 transitions. [2021-12-06 19:31:27,172 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 123 transitions. Word has length 65 [2021-12-06 19:31:27,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:27,172 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 123 transitions. [2021-12-06 19:31:27,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 19:31:27,172 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 123 transitions. [2021-12-06 19:31:27,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 19:31:27,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:27,173 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:27,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-12-06 19:31:27,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:31:27,374 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:31:27,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:27,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1490737222, now seen corresponding path program 1 times [2021-12-06 19:31:27,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:31:27,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [797857879] [2021-12-06 19:31:27,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:27,377 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:31:27,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:31:27,378 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:31:27,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-06 19:31:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:27,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 19:31:27,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:27,560 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 19:31:27,755 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 19:31:27,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 35 [2021-12-06 19:31:27,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:31:27,897 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 13 treesize of output 11 [2021-12-06 19:31:34,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-06 19:31:34,102 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 18 treesize of output 20 [2021-12-06 19:31:34,118 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-06 19:31:34,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:34,864 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-06 19:31:34,865 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:31:34,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [797857879] [2021-12-06 19:31:34,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [797857879] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:31:34,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:31:34,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-12-06 19:31:34,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473402623] [2021-12-06 19:31:34,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:34,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 19:31:34,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:31:34,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 19:31:34,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=619, Unknown=2, NotChecked=0, Total=702 [2021-12-06 19:31:34,866 INFO L87 Difference]: Start difference. First operand 115 states and 123 transitions. Second operand has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 23 states have internal predecessors, (59), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 19:31:36,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:36,284 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2021-12-06 19:31:36,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 19:31:36,285 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 23 states have internal predecessors, (59), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 66 [2021-12-06 19:31:36,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:36,286 INFO L225 Difference]: With dead ends: 137 [2021-12-06 19:31:36,286 INFO L226 Difference]: Without dead ends: 137 [2021-12-06 19:31:36,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=175, Invalid=1463, Unknown=2, NotChecked=0, Total=1640 [2021-12-06 19:31:36,287 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 88 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:36,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 487 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 554 Invalid, 0 Unknown, 107 Unchecked, 0.7s Time] [2021-12-06 19:31:36,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-06 19:31:36,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 118. [2021-12-06 19:31:36,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 99 states have (on average 1.1313131313131313) internal successors, (112), 106 states have internal predecessors, (112), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-06 19:31:36,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 125 transitions. [2021-12-06 19:31:36,291 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 125 transitions. Word has length 66 [2021-12-06 19:31:36,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:36,291 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 125 transitions. [2021-12-06 19:31:36,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 23 states have internal predecessors, (59), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 19:31:36,292 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 125 transitions. [2021-12-06 19:31:36,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 19:31:36,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:36,293 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:36,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-12-06 19:31:36,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:31:36,495 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:31:36,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:36,496 INFO L85 PathProgramCache]: Analyzing trace with hash -280378112, now seen corresponding path program 2 times [2021-12-06 19:31:36,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:31:36,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2147032580] [2021-12-06 19:31:36,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:31:36,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:31:36,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:31:36,500 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:31:36,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-06 19:31:36,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:31:36,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:31:36,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 19:31:36,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:36,747 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 19:31:36,754 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 19:31:37,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:37,115 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 19:31:37,123 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:31:37,123 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 25 [2021-12-06 19:31:37,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:37,250 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 19:31:37,257 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:31:37,257 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 25 [2021-12-06 19:31:37,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:37,408 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 19:31:37,415 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:31:37,415 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 19:31:37,459 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-12-06 19:31:37,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:38,026 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:31:38,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2147032580] [2021-12-06 19:31:38,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2147032580] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:38,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [830310002] [2021-12-06 19:31:38,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:31:38,027 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 19:31:38,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 19:31:38,027 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 19:31:38,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-12-06 19:31:38,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:31:38,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:31:38,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 19:31:38,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:38,428 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 19:31:38,432 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 19:31:38,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:38,721 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 19:31:38,727 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:31:38,728 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 24 treesize of output 24 [2021-12-06 19:31:38,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:38,829 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 19:31:38,836 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:31:38,836 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 19:31:38,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:38,941 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 19:31:38,948 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:31:38,948 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 19:31:38,965 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-12-06 19:31:38,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:41,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [830310002] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:41,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:31:41,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-12-06 19:31:41,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862203699] [2021-12-06 19:31:41,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:41,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 19:31:41,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:31:41,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 19:31:41,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-12-06 19:31:41,310 INFO L87 Difference]: Start difference. First operand 118 states and 125 transitions. Second operand has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 19:31:43,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:43,871 INFO L93 Difference]: Finished difference Result 174 states and 181 transitions. [2021-12-06 19:31:43,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 19:31:43,871 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 70 [2021-12-06 19:31:43,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:43,872 INFO L225 Difference]: With dead ends: 174 [2021-12-06 19:31:43,872 INFO L226 Difference]: Without dead ends: 174 [2021-12-06 19:31:43,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 125 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=59, Invalid=320, Unknown=1, NotChecked=0, Total=380 [2021-12-06 19:31:43,873 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 91 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:43,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 508 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 423 Invalid, 0 Unknown, 52 Unchecked, 0.4s Time] [2021-12-06 19:31:43,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-06 19:31:43,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 118. [2021-12-06 19:31:43,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 99 states have (on average 1.121212121212121) internal successors, (111), 106 states have internal predecessors, (111), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-06 19:31:43,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2021-12-06 19:31:43,876 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 70 [2021-12-06 19:31:43,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:43,876 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2021-12-06 19:31:43,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 19:31:43,877 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2021-12-06 19:31:43,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 19:31:43,877 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:43,877 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:43,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-12-06 19:31:44,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-12-06 19:31:44,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 19:31:44,279 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:31:44,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:44,280 INFO L85 PathProgramCache]: Analyzing trace with hash -590692744, now seen corresponding path program 1 times [2021-12-06 19:31:44,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:31:44,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383474456] [2021-12-06 19:31:44,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:44,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:31:44,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:31:44,284 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:31:44,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-06 19:31:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:44,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:31:44,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-12-06 19:31:44,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-12-06 19:31:44,622 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:31:44,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383474456] [2021-12-06 19:31:44,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383474456] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:31:44,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:31:44,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-06 19:31:44,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078801959] [2021-12-06 19:31:44,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:44,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 19:31:44,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:31:44,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 19:31:44,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:31:44,623 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 19:31:44,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:44,733 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2021-12-06 19:31:44,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:31:44,733 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 69 [2021-12-06 19:31:44,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:44,734 INFO L225 Difference]: With dead ends: 142 [2021-12-06 19:31:44,734 INFO L226 Difference]: Without dead ends: 142 [2021-12-06 19:31:44,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:31:44,734 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 64 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:44,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 219 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:31:44,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-06 19:31:44,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 125. [2021-12-06 19:31:44,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 106 states have (on average 1.1132075471698113) internal successors, (118), 113 states have internal predecessors, (118), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-06 19:31:44,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 131 transitions. [2021-12-06 19:31:44,737 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 131 transitions. Word has length 69 [2021-12-06 19:31:44,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:44,738 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 131 transitions. [2021-12-06 19:31:44,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 19:31:44,738 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 131 transitions. [2021-12-06 19:31:44,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 19:31:44,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:44,738 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:44,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-12-06 19:31:44,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:31:44,939 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:31:44,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:44,941 INFO L85 PathProgramCache]: Analyzing trace with hash -513282356, now seen corresponding path program 1 times [2021-12-06 19:31:44,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:31:44,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810186107] [2021-12-06 19:31:44,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:44,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:31:44,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:31:44,945 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:31:44,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-06 19:31:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:45,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:31:45,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-06 19:31:45,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:45,337 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 19:31:45,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 19:31:45,398 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-06 19:31:45,398 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:31:45,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810186107] [2021-12-06 19:31:45,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810186107] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:31:45,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:31:45,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-12-06 19:31:45,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496544095] [2021-12-06 19:31:45,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:45,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:31:45,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:31:45,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:31:45,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:31:45,399 INFO L87 Difference]: Start difference. First operand 125 states and 131 transitions. Second operand has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:31:45,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:45,475 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2021-12-06 19:31:45,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:31:45,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2021-12-06 19:31:45,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:45,476 INFO L225 Difference]: With dead ends: 130 [2021-12-06 19:31:45,476 INFO L226 Difference]: Without dead ends: 130 [2021-12-06 19:31:45,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:31:45,477 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 39 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:45,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 66 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:31:45,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-06 19:31:45,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-12-06 19:31:45,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 111 states have (on average 1.1081081081081081) internal successors, (123), 118 states have internal predecessors, (123), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-06 19:31:45,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 136 transitions. [2021-12-06 19:31:45,480 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 136 transitions. Word has length 73 [2021-12-06 19:31:45,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:45,480 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 136 transitions. [2021-12-06 19:31:45,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:31:45,480 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 136 transitions. [2021-12-06 19:31:45,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 19:31:45,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:45,481 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:45,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-12-06 19:31:45,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:31:45,682 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:31:45,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:45,683 INFO L85 PathProgramCache]: Analyzing trace with hash 230335872, now seen corresponding path program 1 times [2021-12-06 19:31:45,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:31:45,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145279781] [2021-12-06 19:31:45,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:45,685 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:31:45,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:31:45,687 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:31:45,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-06 19:31:45,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:45,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:31:45,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-06 19:31:45,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-06 19:31:46,075 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:31:46,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145279781] [2021-12-06 19:31:46,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145279781] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:31:46,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:31:46,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-06 19:31:46,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413818803] [2021-12-06 19:31:46,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:46,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 19:31:46,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:31:46,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 19:31:46,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:31:46,077 INFO L87 Difference]: Start difference. First operand 130 states and 136 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 19:31:46,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:46,308 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2021-12-06 19:31:46,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 19:31:46,309 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 76 [2021-12-06 19:31:46,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:46,310 INFO L225 Difference]: With dead ends: 170 [2021-12-06 19:31:46,310 INFO L226 Difference]: Without dead ends: 170 [2021-12-06 19:31:46,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:31:46,311 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 264 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:46,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 241 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:31:46,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-06 19:31:46,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 135. [2021-12-06 19:31:46,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 117 states have (on average 1.0854700854700854) internal successors, (127), 122 states have internal predecessors, (127), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-06 19:31:46,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 140 transitions. [2021-12-06 19:31:46,314 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 140 transitions. Word has length 76 [2021-12-06 19:31:46,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:46,314 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 140 transitions. [2021-12-06 19:31:46,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 19:31:46,314 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 140 transitions. [2021-12-06 19:31:46,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 19:31:46,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:46,315 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:46,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-12-06 19:31:46,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:31:46,515 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:31:46,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:46,516 INFO L85 PathProgramCache]: Analyzing trace with hash 656898895, now seen corresponding path program 1 times [2021-12-06 19:31:46,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:31:46,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001054480] [2021-12-06 19:31:46,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:46,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:31:46,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:31:46,517 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:31:46,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-12-06 19:31:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:46,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 19:31:46,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:47,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:31:47,386 INFO L354 Elim1Store]: treesize reduction 6, result has 50.0 percent of original size [2021-12-06 19:31:47,386 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 64 treesize of output 62 [2021-12-06 19:31:47,613 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 45 treesize of output 33 [2021-12-06 19:31:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-06 19:31:59,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:32:02,643 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:32:02,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001054480] [2021-12-06 19:32:02,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001054480] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:32:02,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [707489764] [2021-12-06 19:32:02,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:32:02,644 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 19:32:02,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 19:32:02,645 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 19:32:02,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-12-06 19:32:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:32:03,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 19:32:03,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:32:08,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:32:08,584 INFO L354 Elim1Store]: treesize reduction 27, result has 18.2 percent of original size [2021-12-06 19:32:08,585 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 71 treesize of output 67 [2021-12-06 19:32:08,804 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 45 treesize of output 33 [2021-12-06 19:32:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-06 19:32:26,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:32:29,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [707489764] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:32:29,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:32:29,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-12-06 19:32:29,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547046191] [2021-12-06 19:32:29,773 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:32:29,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 19:32:29,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:32:29,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 19:32:29,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1340, Unknown=16, NotChecked=0, Total=1482 [2021-12-06 19:32:29,774 INFO L87 Difference]: Start difference. First operand 135 states and 140 transitions. Second operand has 31 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 19:32:29,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:32:29,795 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2021-12-06 19:32:29,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 19:32:29,796 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 75 [2021-12-06 19:32:29,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:32:29,797 INFO L225 Difference]: With dead ends: 142 [2021-12-06 19:32:29,797 INFO L226 Difference]: Without dead ends: 122 [2021-12-06 19:32:29,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 140 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 39.9s TimeCoverageRelationStatistics Valid=126, Invalid=1340, Unknown=16, NotChecked=0, Total=1482 [2021-12-06 19:32:29,798 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:32:29,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 444 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 219 Unchecked, 0.0s Time] [2021-12-06 19:32:29,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-06 19:32:29,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-12-06 19:32:29,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 105 states have (on average 1.0857142857142856) internal successors, (114), 110 states have internal predecessors, (114), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-06 19:32:29,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2021-12-06 19:32:29,801 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 75 [2021-12-06 19:32:29,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:32:29,801 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2021-12-06 19:32:29,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 19:32:29,801 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2021-12-06 19:32:29,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-06 19:32:29,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:32:29,802 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:32:29,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-12-06 19:32:30,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-12-06 19:32:30,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 19:32:30,202 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:32:30,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:32:30,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1246142796, now seen corresponding path program 3 times [2021-12-06 19:32:30,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:32:30,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492318669] [2021-12-06 19:32:30,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:32:30,203 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:32:30,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:32:30,204 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:32:30,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-12-06 19:32:30,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 19:32:30,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:32:30,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 19:32:30,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:32:30,387 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 19:32:30,391 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 19:32:32,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:32:32,737 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 19:32:32,744 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:32:32,744 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 19:32:32,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:32:32,909 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 19:32:32,916 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:32:32,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 19:32:33,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:32:33,085 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 19:32:33,093 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:32:33,093 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 19:32:35,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:32:35,240 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 19:32:35,249 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:32:35,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 19:32:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-06 19:32:35,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:32:35,816 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:32:35,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492318669] [2021-12-06 19:32:35,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492318669] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:32:35,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1446625978] [2021-12-06 19:32:35,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:32:35,817 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 19:32:35,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 19:32:35,817 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 19:32:35,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-12-06 19:32:36,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 19:32:36,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:32:36,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 19:32:36,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:32:36,104 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 19:32:36,111 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 19:32:36,398 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:32:36,398 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 19:32:36,406 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 19:32:36,592 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:32:36,593 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 19:32:36,598 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 19:32:36,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:32:36,825 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 19:32:36,832 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:32:36,832 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 19:32:38,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:32:38,934 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 19:32:38,941 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:32:38,942 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 19:32:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-06 19:32:38,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:32:41,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1446625978] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:32:41,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:32:41,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 21 [2021-12-06 19:32:41,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431340415] [2021-12-06 19:32:41,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:32:41,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 19:32:41,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:32:41,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 19:32:41,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=481, Unknown=1, NotChecked=0, Total=552 [2021-12-06 19:32:41,331 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 22 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-06 19:32:42,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:32:42,131 INFO L93 Difference]: Finished difference Result 176 states and 182 transitions. [2021-12-06 19:32:42,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 19:32:42,131 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 80 [2021-12-06 19:32:42,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:32:42,132 INFO L225 Difference]: With dead ends: 176 [2021-12-06 19:32:42,132 INFO L226 Difference]: Without dead ends: 176 [2021-12-06 19:32:42,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 137 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=101, Invalid=710, Unknown=1, NotChecked=0, Total=812 [2021-12-06 19:32:42,133 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 75 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:32:42,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 646 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 671 Invalid, 0 Unknown, 58 Unchecked, 0.6s Time] [2021-12-06 19:32:42,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-06 19:32:42,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 126. [2021-12-06 19:32:42,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 108 states have (on average 1.0833333333333333) internal successors, (117), 113 states have internal predecessors, (117), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-06 19:32:42,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2021-12-06 19:32:42,136 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 80 [2021-12-06 19:32:42,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:32:42,136 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2021-12-06 19:32:42,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-06 19:32:42,137 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2021-12-06 19:32:42,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 19:32:42,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:32:42,137 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:32:42,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-12-06 19:32:42,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-12-06 19:32:42,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:32:42,538 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:32:42,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:32:42,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1176035772, now seen corresponding path program 2 times [2021-12-06 19:32:42,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:32:42,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709131056] [2021-12-06 19:32:42,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:32:42,541 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:32:42,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:32:42,544 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:32:42,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-12-06 19:32:42,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:32:42,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:32:42,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 19:32:42,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:32:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-06 19:32:43,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:32:43,401 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 34 treesize of output 30 [2021-12-06 19:32:45,969 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-06 19:32:45,969 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:32:45,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709131056] [2021-12-06 19:32:45,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709131056] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:32:45,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:32:45,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-12-06 19:32:45,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247400579] [2021-12-06 19:32:45,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:32:45,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 19:32:45,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:32:45,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 19:32:45,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-12-06 19:32:45,970 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand has 21 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 19:32:56,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:32:56,752 INFO L93 Difference]: Finished difference Result 311 states and 324 transitions. [2021-12-06 19:32:56,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 19:32:56,754 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 79 [2021-12-06 19:32:56,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:32:56,755 INFO L225 Difference]: With dead ends: 311 [2021-12-06 19:32:56,755 INFO L226 Difference]: Without dead ends: 311 [2021-12-06 19:32:56,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=484, Invalid=1772, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 19:32:56,756 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 1030 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:32:56,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1031 Valid, 457 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 19:32:56,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-12-06 19:32:56,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 159. [2021-12-06 19:32:56,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 139 states have (on average 1.158273381294964) internal successors, (161), 144 states have internal predecessors, (161), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2021-12-06 19:32:56,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 182 transitions. [2021-12-06 19:32:56,762 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 182 transitions. Word has length 79 [2021-12-06 19:32:56,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:32:56,763 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 182 transitions. [2021-12-06 19:32:56,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 19:32:56,763 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 182 transitions. [2021-12-06 19:32:56,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-06 19:32:56,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:32:56,763 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:32:56,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2021-12-06 19:32:56,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:32:56,964 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:32:56,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:32:56,966 INFO L85 PathProgramCache]: Analyzing trace with hash -2097370558, now seen corresponding path program 1 times [2021-12-06 19:32:56,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:32:56,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [856513299] [2021-12-06 19:32:56,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:32:56,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:32:56,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:32:56,970 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:32:56,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-12-06 19:32:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:32:57,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 19:32:57,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:32:57,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:32:57,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:32:57,574 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 28 treesize of output 27 [2021-12-06 19:32:57,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:32:57,739 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 28 treesize of output 27 [2021-12-06 19:32:57,781 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 19:32:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 19:32:57,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:33:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-06 19:33:01,311 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:33:01,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [856513299] [2021-12-06 19:33:01,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [856513299] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:33:01,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:33:01,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-12-06 19:33:01,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118579066] [2021-12-06 19:33:01,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:33:01,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 19:33:01,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:33:01,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 19:33:01,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-12-06 19:33:01,312 INFO L87 Difference]: Start difference. First operand 159 states and 182 transitions. Second operand has 22 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 19 states have internal predecessors, (73), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-06 19:33:03,638 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:33:04,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:04,445 INFO L93 Difference]: Finished difference Result 210 states and 229 transitions. [2021-12-06 19:33:04,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 19:33:04,446 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 19 states have internal predecessors, (73), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 80 [2021-12-06 19:33:04,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:04,447 INFO L225 Difference]: With dead ends: 210 [2021-12-06 19:33:04,447 INFO L226 Difference]: Without dead ends: 210 [2021-12-06 19:33:04,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=341, Invalid=2311, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 19:33:04,448 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 273 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:04,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 683 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 583 Invalid, 0 Unknown, 41 Unchecked, 1.9s Time] [2021-12-06 19:33:04,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-06 19:33:04,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 172. [2021-12-06 19:33:04,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 150 states have (on average 1.1666666666666667) internal successors, (175), 156 states have internal predecessors, (175), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2021-12-06 19:33:04,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 196 transitions. [2021-12-06 19:33:04,452 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 196 transitions. Word has length 80 [2021-12-06 19:33:04,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:04,452 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 196 transitions. [2021-12-06 19:33:04,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 19 states have internal predecessors, (73), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-06 19:33:04,452 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 196 transitions. [2021-12-06 19:33:04,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 19:33:04,453 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:04,453 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:04,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-12-06 19:33:04,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:33:04,654 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:33:04,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:04,655 INFO L85 PathProgramCache]: Analyzing trace with hash -593977757, now seen corresponding path program 1 times [2021-12-06 19:33:04,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:33:04,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016541135] [2021-12-06 19:33:04,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:04,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:33:04,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:33:04,661 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:33:04,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-12-06 19:33:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:05,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 19:33:05,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:33:05,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:33:05,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:33:05,453 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 23 treesize of output 22 [2021-12-06 19:33:05,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:33:05,671 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 23 treesize of output 22 [2021-12-06 19:33:05,725 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 19:33:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-06 19:33:05,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:33:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-06 19:33:10,448 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:33:10,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016541135] [2021-12-06 19:33:10,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016541135] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:33:10,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:33:10,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2021-12-06 19:33:10,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290052059] [2021-12-06 19:33:10,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:33:10,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 19:33:10,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:33:10,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 19:33:10,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-12-06 19:33:10,450 INFO L87 Difference]: Start difference. First operand 172 states and 196 transitions. Second operand has 23 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 20 states have internal predecessors, (76), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-06 19:33:14,443 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:33:15,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:15,748 INFO L93 Difference]: Finished difference Result 188 states and 207 transitions. [2021-12-06 19:33:15,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 19:33:15,750 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 20 states have internal predecessors, (76), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 81 [2021-12-06 19:33:15,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:15,751 INFO L225 Difference]: With dead ends: 188 [2021-12-06 19:33:15,751 INFO L226 Difference]: Without dead ends: 188 [2021-12-06 19:33:15,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=334, Invalid=2422, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 19:33:15,752 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 182 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 67 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:15,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 420 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 588 Invalid, 1 Unknown, 67 Unchecked, 3.2s Time] [2021-12-06 19:33:15,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-06 19:33:15,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 173. [2021-12-06 19:33:15,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 151 states have (on average 1.1589403973509933) internal successors, (175), 157 states have internal predecessors, (175), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2021-12-06 19:33:15,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 196 transitions. [2021-12-06 19:33:15,755 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 196 transitions. Word has length 81 [2021-12-06 19:33:15,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:15,756 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 196 transitions. [2021-12-06 19:33:15,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 20 states have internal predecessors, (76), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-06 19:33:15,756 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 196 transitions. [2021-12-06 19:33:15,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 19:33:15,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:15,756 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:15,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-12-06 19:33:15,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:33:15,957 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:33:15,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:15,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1233441180, now seen corresponding path program 1 times [2021-12-06 19:33:15,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:33:15,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206173747] [2021-12-06 19:33:15,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:15,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:33:15,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:33:15,959 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:33:15,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-12-06 19:33:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:16,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 19:33:16,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:33:16,300 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 19:33:16,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:33:16,415 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 19 treesize of output 13 [2021-12-06 19:33:16,474 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-06 19:33:16,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 46 [2021-12-06 19:33:16,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:33:16,597 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 38 treesize of output 33 [2021-12-06 19:33:16,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-12-06 19:33:17,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:33:17,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2021-12-06 19:33:17,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:33:17,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:33:17,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:33:17,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 44 [2021-12-06 19:33:17,222 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 22 [2021-12-06 19:33:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 10 proven. 59 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-06 19:33:17,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:33:18,072 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:33:18,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206173747] [2021-12-06 19:33:18,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206173747] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:33:18,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2136425623] [2021-12-06 19:33:18,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:18,072 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 19:33:18,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 19:33:18,073 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 19:33:18,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-12-06 19:33:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:19,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 19:33:19,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:33:19,219 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 19:33:19,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:33:19,299 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 18 treesize of output 12 [2021-12-06 19:33:19,347 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-06 19:33:19,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 46 [2021-12-06 19:33:19,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:33:19,419 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 38 treesize of output 33 [2021-12-06 19:33:19,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-12-06 19:33:19,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:33:19,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2021-12-06 19:33:19,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:33:19,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:33:19,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:33:19,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2021-12-06 19:33:19,781 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 22 [2021-12-06 19:33:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 10 proven. 59 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-06 19:33:19,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:33:20,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2136425623] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:33:20,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:33:20,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-12-06 19:33:20,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185832144] [2021-12-06 19:33:20,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:33:20,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 19:33:20,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:33:20,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 19:33:20,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2021-12-06 19:33:20,245 INFO L87 Difference]: Start difference. First operand 173 states and 196 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 22 states have internal predecessors, (53), 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 19:33:20,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:20,615 INFO L93 Difference]: Finished difference Result 173 states and 195 transitions. [2021-12-06 19:33:20,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 19:33:20,616 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 22 states have internal predecessors, (53), 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 82 [2021-12-06 19:33:20,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:20,617 INFO L225 Difference]: With dead ends: 173 [2021-12-06 19:33:20,617 INFO L226 Difference]: Without dead ends: 173 [2021-12-06 19:33:20,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 152 SyntacticMatches, 15 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=118, Invalid=1214, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 19:33:20,618 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 15 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:20,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 487 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 182 Invalid, 0 Unknown, 244 Unchecked, 0.2s Time] [2021-12-06 19:33:20,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-06 19:33:20,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-12-06 19:33:20,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 151 states have (on average 1.1523178807947019) internal successors, (174), 157 states have internal predecessors, (174), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2021-12-06 19:33:20,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 195 transitions. [2021-12-06 19:33:20,623 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 195 transitions. Word has length 82 [2021-12-06 19:33:20,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:20,624 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 195 transitions. [2021-12-06 19:33:20,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 22 states have internal predecessors, (53), 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 19:33:20,624 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 195 transitions. [2021-12-06 19:33:20,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 19:33:20,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:20,625 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:20,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2021-12-06 19:33:20,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-12-06 19:33:21,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:33:21,026 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:33:21,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:21,027 INFO L85 PathProgramCache]: Analyzing trace with hash 418029190, now seen corresponding path program 1 times [2021-12-06 19:33:21,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:33:21,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390303182] [2021-12-06 19:33:21,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:21,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:33:21,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:33:21,032 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:33:21,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-12-06 19:33:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:21,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 19:33:21,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:33:21,289 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 19:33:21,496 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:33:21,496 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 24 treesize of output 24 [2021-12-06 19:33:21,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:33:23,635 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_55| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_55|) (_ bv0 32)) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_55|))) is different from true [2021-12-06 19:33:23,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:33:23,702 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 29 treesize of output 28 [2021-12-06 19:33:25,743 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_56| (_ BitVec 32))) (not (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_56| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_56|) (_ bv0 32))))) is different from true [2021-12-06 19:33:25,860 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 19:33:25,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:33:25,873 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 24 treesize of output 23 [2021-12-06 19:33:25,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-06 19:33:25,967 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 19 treesize of output 21 [2021-12-06 19:33:25,993 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 145 trivial. 16 not checked. [2021-12-06 19:33:25,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:33:26,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-12-06 19:33:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 19:33:27,072 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:33:27,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390303182] [2021-12-06 19:33:27,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [390303182] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:33:27,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:33:27,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-12-06 19:33:27,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708697981] [2021-12-06 19:33:27,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:33:27,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 19:33:27,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:33:27,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 19:33:27,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=744, Unknown=2, NotChecked=110, Total=930 [2021-12-06 19:33:27,074 INFO L87 Difference]: Start difference. First operand 173 states and 195 transitions. Second operand has 31 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 27 states have internal predecessors, (85), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 19:33:42,355 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:33:43,641 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:33:44,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:44,732 INFO L93 Difference]: Finished difference Result 192 states and 210 transitions. [2021-12-06 19:33:44,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 19:33:44,733 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 27 states have internal predecessors, (85), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 83 [2021-12-06 19:33:44,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:44,734 INFO L225 Difference]: With dead ends: 192 [2021-12-06 19:33:44,734 INFO L226 Difference]: Without dead ends: 192 [2021-12-06 19:33:44,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 127 SyntacticMatches, 10 SemanticMatches, 58 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=311, Invalid=2999, Unknown=4, NotChecked=226, Total=3540 [2021-12-06 19:33:44,735 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 139 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:44,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 616 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 905 Invalid, 0 Unknown, 284 Unchecked, 3.7s Time] [2021-12-06 19:33:44,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-06 19:33:44,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 175. [2021-12-06 19:33:44,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 153 states have (on average 1.1503267973856208) internal successors, (176), 159 states have internal predecessors, (176), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2021-12-06 19:33:44,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 197 transitions. [2021-12-06 19:33:44,739 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 197 transitions. Word has length 83 [2021-12-06 19:33:44,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:44,739 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 197 transitions. [2021-12-06 19:33:44,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 27 states have internal predecessors, (85), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 19:33:44,739 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 197 transitions. [2021-12-06 19:33:44,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 19:33:44,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:44,740 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:44,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-12-06 19:33:44,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:33:44,941 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:33:44,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:44,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1306673498, now seen corresponding path program 2 times [2021-12-06 19:33:44,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:33:44,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336137756] [2021-12-06 19:33:44,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:33:44,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:33:44,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:33:44,946 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:33:44,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-12-06 19:33:45,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:33:45,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:33:45,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 19:33:45,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:33:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-06 19:33:45,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:33:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-06 19:33:45,664 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:33:45,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336137756] [2021-12-06 19:33:45,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336137756] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:33:45,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:33:45,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-06 19:33:45,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932294256] [2021-12-06 19:33:45,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:33:45,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 19:33:45,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:33:45,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 19:33:45,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:33:45,665 INFO L87 Difference]: Start difference. First operand 175 states and 197 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 19:33:45,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:45,894 INFO L93 Difference]: Finished difference Result 182 states and 196 transitions. [2021-12-06 19:33:45,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:33:45,895 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 87 [2021-12-06 19:33:45,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:45,895 INFO L225 Difference]: With dead ends: 182 [2021-12-06 19:33:45,896 INFO L226 Difference]: Without dead ends: 182 [2021-12-06 19:33:45,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-12-06 19:33:45,896 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 89 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:45,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 434 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:33:45,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-06 19:33:45,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 167. [2021-12-06 19:33:45,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 145 states have (on average 1.1172413793103448) internal successors, (162), 151 states have internal predecessors, (162), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2021-12-06 19:33:45,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 183 transitions. [2021-12-06 19:33:45,900 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 183 transitions. Word has length 87 [2021-12-06 19:33:45,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:45,900 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 183 transitions. [2021-12-06 19:33:45,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 19:33:45,900 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 183 transitions. [2021-12-06 19:33:45,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 19:33:45,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:45,900 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:45,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-12-06 19:33:46,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:33:46,101 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:33:46,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:46,102 INFO L85 PathProgramCache]: Analyzing trace with hash -891953512, now seen corresponding path program 1 times [2021-12-06 19:33:46,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:33:46,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337926637] [2021-12-06 19:33:46,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:46,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:33:46,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:33:46,103 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:33:46,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-12-06 19:33:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:46,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 19:33:46,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:33:46,463 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-12-06 19:33:46,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:33:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-12-06 19:33:46,760 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:33:46,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337926637] [2021-12-06 19:33:46,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337926637] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:33:46,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:33:46,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-06 19:33:46,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548521362] [2021-12-06 19:33:46,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:33:46,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 19:33:46,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:33:46,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 19:33:46,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:33:46,761 INFO L87 Difference]: Start difference. First operand 167 states and 183 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 19:33:47,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:47,433 INFO L93 Difference]: Finished difference Result 414 states and 445 transitions. [2021-12-06 19:33:47,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 19:33:47,433 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 89 [2021-12-06 19:33:47,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:47,435 INFO L225 Difference]: With dead ends: 414 [2021-12-06 19:33:47,435 INFO L226 Difference]: Without dead ends: 414 [2021-12-06 19:33:47,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-12-06 19:33:47,436 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 912 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:47,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [912 Valid, 628 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:33:47,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-12-06 19:33:47,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 190. [2021-12-06 19:33:47,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 165 states have (on average 1.1151515151515152) internal successors, (184), 170 states have internal predecessors, (184), 11 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2021-12-06 19:33:47,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 214 transitions. [2021-12-06 19:33:47,440 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 214 transitions. Word has length 89 [2021-12-06 19:33:47,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:47,441 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 214 transitions. [2021-12-06 19:33:47,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 19:33:47,441 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 214 transitions. [2021-12-06 19:33:47,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-06 19:33:47,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:47,441 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:47,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-12-06 19:33:47,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:33:47,642 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:33:47,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:47,643 INFO L85 PathProgramCache]: Analyzing trace with hash -586455192, now seen corresponding path program 4 times [2021-12-06 19:33:47,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:33:47,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282292728] [2021-12-06 19:33:47,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:33:47,646 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:33:47,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:33:47,647 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:33:47,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-12-06 19:33:47,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:33:47,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:33:47,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 19:33:47,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:33:47,939 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 19:33:47,945 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 19:33:48,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:33:48,293 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 19:33:48,301 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:33:48,302 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 24 treesize of output 24 [2021-12-06 19:33:48,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:33:48,444 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 19:33:48,451 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:33:48,452 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 24 treesize of output 24 [2021-12-06 19:33:50,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:33:50,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 19:33:50,631 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:33:50,632 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 19:33:50,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:33:50,826 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 19:33:50,838 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:33:50,838 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 19:33:51,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:33:51,017 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 19:33:51,025 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:33:51,025 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 24 treesize of output 24 [2021-12-06 19:33:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-12-06 19:33:51,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:33:53,646 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:33:53,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282292728] [2021-12-06 19:33:53,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282292728] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:33:53,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1380609287] [2021-12-06 19:33:53,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:33:53,646 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 19:33:53,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 19:33:53,647 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 19:33:53,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2021-12-06 19:33:54,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:33:54,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:33:54,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 19:33:54,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:33:54,216 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 19:33:54,219 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 19:33:54,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:33:54,487 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 19:33:54,495 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:33:54,495 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 19:33:54,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:33:54,594 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 19:33:54,601 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:33:54,601 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 19:33:54,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:33:54,703 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 19:33:54,710 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:33:54,710 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 19:33:54,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:33:54,821 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 19:33:54,828 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:33:54,828 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 19:33:54,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:33:54,932 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 19:33:54,941 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:33:54,941 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 23 treesize of output 23 [2021-12-06 19:33:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-12-06 19:33:54,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:33:57,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1380609287] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:33:57,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:33:57,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-12-06 19:33:57,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151191192] [2021-12-06 19:33:57,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:33:57,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 19:33:57,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:33:57,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 19:33:57,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=360, Unknown=1, NotChecked=0, Total=420 [2021-12-06 19:33:57,347 INFO L87 Difference]: Start difference. First operand 190 states and 214 transitions. Second operand has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 19:34:00,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:34:00,225 INFO L93 Difference]: Finished difference Result 270 states and 296 transitions. [2021-12-06 19:34:00,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 19:34:00,225 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 90 [2021-12-06 19:34:00,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:34:00,226 INFO L225 Difference]: With dead ends: 270 [2021-12-06 19:34:00,226 INFO L226 Difference]: Without dead ends: 270 [2021-12-06 19:34:00,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 157 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=75, Invalid=475, Unknown=2, NotChecked=0, Total=552 [2021-12-06 19:34:00,227 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 84 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:34:00,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 901 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 743 Invalid, 0 Unknown, 61 Unchecked, 0.7s Time] [2021-12-06 19:34:00,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-06 19:34:00,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 190. [2021-12-06 19:34:00,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 165 states have (on average 1.1090909090909091) internal successors, (183), 170 states have internal predecessors, (183), 11 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2021-12-06 19:34:00,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 213 transitions. [2021-12-06 19:34:00,231 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 213 transitions. Word has length 90 [2021-12-06 19:34:00,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:34:00,231 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 213 transitions. [2021-12-06 19:34:00,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 19:34:00,232 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 213 transitions. [2021-12-06 19:34:00,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-06 19:34:00,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:34:00,232 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:34:00,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2021-12-06 19:34:00,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-12-06 19:34:00,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:34:00,633 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:34:00,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:34:00,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1366153752, now seen corresponding path program 2 times [2021-12-06 19:34:00,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:34:00,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1483014456] [2021-12-06 19:34:00,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:34:00,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:34:00,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:34:00,639 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:34:00,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-12-06 19:34:00,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:34:00,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:34:00,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 19:34:00,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:34:01,099 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 19:34:01,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:34:01,249 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 18 treesize of output 12 [2021-12-06 19:34:01,318 INFO L354 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2021-12-06 19:34:01,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 52 [2021-12-06 19:34:01,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:34:01,456 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 40 treesize of output 33 [2021-12-06 19:34:01,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-12-06 19:34:02,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:34:02,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2021-12-06 19:34:02,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:34:02,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:34:02,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:34:02,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 42 [2021-12-06 19:34:02,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-12-06 19:34:02,269 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 102 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-06 19:34:02,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:34:03,278 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:34:03,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1483014456] [2021-12-06 19:34:03,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1483014456] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:34:03,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1974756720] [2021-12-06 19:34:03,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:34:03,279 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 19:34:03,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 19:34:03,279 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 19:34:03,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-12-06 19:34:03,637 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:34:03,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819170467] [2021-12-06 19:34:03,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:34:03,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:34:03,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:34:03,638 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:34:03,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-06 19:34:03,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 1 [2021-12-06 19:34:03,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:34:03,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:34:03,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 19:34:03,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:34:04,231 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 19:34:04,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:34:04,563 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 15 treesize of output 9 [2021-12-06 19:34:04,626 INFO L354 Elim1Store]: treesize reduction 42, result has 42.5 percent of original size [2021-12-06 19:34:04,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 55 [2021-12-06 19:34:04,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:34:04,903 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 48 treesize of output 38 [2021-12-06 19:34:05,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-12-06 19:34:05,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:34:05,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2021-12-06 19:34:05,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:34:05,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:34:05,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:34:05,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 42 [2021-12-06 19:34:05,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-12-06 19:34:05,625 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-06 19:34:05,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:34:06,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819170467] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:34:06,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:34:06,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 39 [2021-12-06 19:34:06,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104110654] [2021-12-06 19:34:06,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:34:06,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 19:34:06,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:34:06,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 19:34:06,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2368, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 19:34:06,790 INFO L87 Difference]: Start difference. First operand 190 states and 213 transitions. Second operand has 40 states, 38 states have (on average 2.289473684210526) internal successors, (87), 34 states have internal predecessors, (87), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 19:34:07,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:34:07,568 INFO L93 Difference]: Finished difference Result 214 states and 238 transitions. [2021-12-06 19:34:07,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 19:34:07,569 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.289473684210526) internal successors, (87), 34 states have internal predecessors, (87), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 92 [2021-12-06 19:34:07,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:34:07,570 INFO L225 Difference]: With dead ends: 214 [2021-12-06 19:34:07,570 INFO L226 Difference]: Without dead ends: 214 [2021-12-06 19:34:07,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 156 SyntacticMatches, 11 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=240, Invalid=3300, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 19:34:07,572 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 36 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 852 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:34:07,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1002 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 376 Invalid, 0 Unknown, 852 Unchecked, 0.4s Time] [2021-12-06 19:34:07,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-06 19:34:07,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 209. [2021-12-06 19:34:07,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 183 states have (on average 1.1092896174863387) internal successors, (203), 187 states have internal predecessors, (203), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (19), 15 states have call predecessors, (19), 11 states have call successors, (19) [2021-12-06 19:34:07,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 233 transitions. [2021-12-06 19:34:07,578 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 233 transitions. Word has length 92 [2021-12-06 19:34:07,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:34:07,578 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 233 transitions. [2021-12-06 19:34:07,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.289473684210526) internal successors, (87), 34 states have internal predecessors, (87), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 19:34:07,578 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 233 transitions. [2021-12-06 19:34:07,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-06 19:34:07,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:34:07,579 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:34:07,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2021-12-06 19:34:07,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-12-06 19:34:07,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:34:07,980 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:34:07,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:34:07,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1739385347, now seen corresponding path program 2 times [2021-12-06 19:34:07,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:34:07,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53567902] [2021-12-06 19:34:07,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:34:07,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:34:07,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:34:07,985 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:34:07,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-12-06 19:34:08,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:34:08,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:34:08,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 19:34:08,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:34:08,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:34:09,075 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 19:34:09,076 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 57 treesize of output 49 [2021-12-06 19:34:19,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:34:19,567 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 72 treesize of output 63 [2021-12-06 19:34:19,916 INFO L354 Elim1Store]: treesize reduction 39, result has 13.3 percent of original size [2021-12-06 19:34:19,916 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 209 treesize of output 199 [2021-12-06 19:34:30,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:34:30,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 65 [2021-12-06 19:34:30,638 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 66 treesize of output 50 [2021-12-06 19:34:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 61 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-06 19:34:41,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:34:43,790 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:34:43,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53567902] [2021-12-06 19:34:43,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53567902] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:34:43,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [537663520] [2021-12-06 19:34:43,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:34:43,791 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 19:34:43,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 19:34:43,791 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 19:34:43,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2021-12-06 19:34:45,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:34:45,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:34:45,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 19:34:45,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:34:58,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:35:01,333 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-12-06 19:35:01,333 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 63 treesize of output 53 [2021-12-06 19:35:08,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:35:08,149 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 88 treesize of output 69 [2021-12-06 19:35:08,824 INFO L354 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2021-12-06 19:35:08,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 330 treesize of output 304 [2021-12-06 19:35:19,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:35:19,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:35:19,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:35:19,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 65 [2021-12-06 19:35:20,235 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 67 treesize of output 51 [2021-12-06 19:35:30,746 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-06 19:35:30,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:35:33,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [537663520] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:35:33,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:35:33,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 53 [2021-12-06 19:35:33,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420026301] [2021-12-06 19:35:33,859 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:35:33,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-06 19:35:33,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:35:33,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-06 19:35:33,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=4156, Unknown=18, NotChecked=0, Total=4422 [2021-12-06 19:35:33,861 INFO L87 Difference]: Start difference. First operand 209 states and 233 transitions. Second operand has 54 states, 51 states have (on average 2.156862745098039) internal successors, (110), 48 states have internal predecessors, (110), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 19:35:46,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:35:46,121 INFO L93 Difference]: Finished difference Result 216 states and 239 transitions. [2021-12-06 19:35:46,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 19:35:46,122 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 51 states have (on average 2.156862745098039) internal successors, (110), 48 states have internal predecessors, (110), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 92 [2021-12-06 19:35:46,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:35:46,123 INFO L225 Difference]: With dead ends: 216 [2021-12-06 19:35:46,123 INFO L226 Difference]: Without dead ends: 189 [2021-12-06 19:35:46,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 160 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1551 ImplicationChecksByTransitivity, 87.2s TimeCoverageRelationStatistics Valid=262, Invalid=4546, Unknown=22, NotChecked=0, Total=4830 [2021-12-06 19:35:46,125 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 16 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:35:46,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 679 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 302 Unchecked, 0.0s Time] [2021-12-06 19:35:46,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-12-06 19:35:46,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-12-06 19:35:46,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 164 states have (on average 1.1158536585365855) internal successors, (183), 168 states have internal predecessors, (183), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-06 19:35:46,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 212 transitions. [2021-12-06 19:35:46,128 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 212 transitions. Word has length 92 [2021-12-06 19:35:46,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:35:46,128 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 212 transitions. [2021-12-06 19:35:46,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 51 states have (on average 2.156862745098039) internal successors, (110), 48 states have internal predecessors, (110), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 19:35:46,129 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 212 transitions. [2021-12-06 19:35:46,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 19:35:46,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:35:46,129 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 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 19:35:46,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2021-12-06 19:35:46,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2021-12-06 19:35:46,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 19:35:46,531 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:35:46,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:35:46,532 INFO L85 PathProgramCache]: Analyzing trace with hash -862774809, now seen corresponding path program 3 times [2021-12-06 19:35:46,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:35:46,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436661321] [2021-12-06 19:35:46,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:35:46,534 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:35:46,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:35:46,536 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:35:46,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-12-06 19:35:46,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 19:35:46,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:35:46,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 19:35:46,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:35:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-12-06 19:35:46,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:35:47,208 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-12-06 19:35:47,208 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:35:47,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436661321] [2021-12-06 19:35:47,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436661321] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:35:47,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:35:47,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-12-06 19:35:47,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407332587] [2021-12-06 19:35:47,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:35:47,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 19:35:47,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:35:47,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 19:35:47,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-06 19:35:47,209 INFO L87 Difference]: Start difference. First operand 189 states and 212 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 19:35:48,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:35:48,427 INFO L93 Difference]: Finished difference Result 354 states and 377 transitions. [2021-12-06 19:35:48,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 19:35:48,428 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 95 [2021-12-06 19:35:48,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:35:48,429 INFO L225 Difference]: With dead ends: 354 [2021-12-06 19:35:48,429 INFO L226 Difference]: Without dead ends: 354 [2021-12-06 19:35:48,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=288, Invalid=834, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 19:35:48,430 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 614 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:35:48,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 410 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:35:48,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-12-06 19:35:48,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 203. [2021-12-06 19:35:48,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 178 states have (on average 1.095505617977528) internal successors, (195), 181 states have internal predecessors, (195), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (18), 15 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-06 19:35:48,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 224 transitions. [2021-12-06 19:35:48,434 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 224 transitions. Word has length 95 [2021-12-06 19:35:48,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:35:48,434 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 224 transitions. [2021-12-06 19:35:48,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 19:35:48,434 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 224 transitions. [2021-12-06 19:35:48,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-06 19:35:48,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:35:48,435 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:35:48,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2021-12-06 19:35:48,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:35:48,636 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:35:48,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:35:48,637 INFO L85 PathProgramCache]: Analyzing trace with hash -730597920, now seen corresponding path program 3 times [2021-12-06 19:35:48,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:35:48,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875418124] [2021-12-06 19:35:48,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:35:48,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:35:48,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:35:48,641 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:35:48,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-12-06 19:35:49,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 19:35:49,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:35:49,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 19:35:49,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:35:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 14 proven. 27 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-12-06 19:35:50,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:35:51,269 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 34 treesize of output 30 [2021-12-06 19:35:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 14 proven. 27 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-12-06 19:35:51,836 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:35:51,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875418124] [2021-12-06 19:35:51,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875418124] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:35:51,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:35:51,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-12-06 19:35:51,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553735532] [2021-12-06 19:35:51,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:35:51,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 19:35:51,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:35:51,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 19:35:51,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:35:51,837 INFO L87 Difference]: Start difference. First operand 203 states and 224 transitions. Second operand has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 12 states have internal predecessors, (52), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 19:35:58,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:35:58,339 INFO L93 Difference]: Finished difference Result 232 states and 250 transitions. [2021-12-06 19:35:58,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 19:35:58,340 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 12 states have internal predecessors, (52), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 96 [2021-12-06 19:35:58,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:35:58,341 INFO L225 Difference]: With dead ends: 232 [2021-12-06 19:35:58,341 INFO L226 Difference]: Without dead ends: 232 [2021-12-06 19:35:58,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-12-06 19:35:58,342 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 206 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:35:58,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 426 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-12-06 19:35:58,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-12-06 19:35:58,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 194. [2021-12-06 19:35:58,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 169 states have (on average 1.1005917159763314) internal successors, (186), 173 states have internal predecessors, (186), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-06 19:35:58,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 215 transitions. [2021-12-06 19:35:58,346 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 215 transitions. Word has length 96 [2021-12-06 19:35:58,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:35:58,346 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 215 transitions. [2021-12-06 19:35:58,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 12 states have internal predecessors, (52), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 19:35:58,346 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 215 transitions. [2021-12-06 19:35:58,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 19:35:58,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:35:58,347 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:35:58,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-12-06 19:35:58,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:35:58,547 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:35:58,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:35:58,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1173699034, now seen corresponding path program 3 times [2021-12-06 19:35:58,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:35:58,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683882166] [2021-12-06 19:35:58,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:35:58,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:35:58,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:35:58,549 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:35:58,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-12-06 19:35:58,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 19:35:58,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:35:58,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 19:35:58,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:35:58,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:35:59,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:35:59,040 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 28 treesize of output 27 [2021-12-06 19:35:59,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:35:59,132 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 23 treesize of output 22 [2021-12-06 19:35:59,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:35:59,286 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 23 treesize of output 22 [2021-12-06 19:35:59,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:35:59,359 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 23 treesize of output 22 [2021-12-06 19:35:59,400 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 19:35:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 12 proven. 55 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-06 19:35:59,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:36:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-12-06 19:36:01,168 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:36:01,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683882166] [2021-12-06 19:36:01,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683882166] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:36:01,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:36:01,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-12-06 19:36:01,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785576036] [2021-12-06 19:36:01,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:36:01,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 19:36:01,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:36:01,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 19:36:01,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-12-06 19:36:01,170 INFO L87 Difference]: Start difference. First operand 194 states and 215 transitions. Second operand has 29 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 26 states have internal predecessors, (97), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-06 19:36:10,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:36:10,960 INFO L93 Difference]: Finished difference Result 281 states and 301 transitions. [2021-12-06 19:36:10,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-06 19:36:10,960 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 26 states have internal predecessors, (97), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) Word has length 97 [2021-12-06 19:36:10,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:36:10,961 INFO L225 Difference]: With dead ends: 281 [2021-12-06 19:36:10,961 INFO L226 Difference]: Without dead ends: 281 [2021-12-06 19:36:10,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 165 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2009 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1064, Invalid=5908, Unknown=0, NotChecked=0, Total=6972 [2021-12-06 19:36:10,963 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 572 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:36:10,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 662 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 763 Invalid, 0 Unknown, 54 Unchecked, 1.8s Time] [2021-12-06 19:36:10,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-12-06 19:36:10,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 219. [2021-12-06 19:36:10,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 193 states have (on average 1.16580310880829) internal successors, (225), 198 states have internal predecessors, (225), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-06 19:36:10,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 254 transitions. [2021-12-06 19:36:10,969 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 254 transitions. Word has length 97 [2021-12-06 19:36:10,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:36:10,969 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 254 transitions. [2021-12-06 19:36:10,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 26 states have internal predecessors, (97), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-06 19:36:10,969 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 254 transitions. [2021-12-06 19:36:10,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-06 19:36:10,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:10,970 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:36:10,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-12-06 19:36:11,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:36:11,171 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:36:11,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:11,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1547771676, now seen corresponding path program 5 times [2021-12-06 19:36:11,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:36:11,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141371111] [2021-12-06 19:36:11,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:36:11,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:36:11,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:36:11,177 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:36:11,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-12-06 19:36:11,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-06 19:36:11,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:36:11,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-06 19:36:11,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:36:11,790 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 19:36:14,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:14,128 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 19:36:14,136 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:36:14,136 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 19:36:16,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:16,319 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 19:36:16,327 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:36:16,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 19:36:16,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:16,519 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 19:36:16,526 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:36:16,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 19:36:18,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:18,699 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 19:36:18,711 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:36:18,711 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 19:36:18,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:18,884 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 19:36:18,892 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:36:18,892 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 19:36:21,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:21,083 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 19:36:21,091 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:36:21,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 19:36:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 85 proven. 103 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-06 19:36:21,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:36:23,745 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:36:23,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141371111] [2021-12-06 19:36:23,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141371111] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:36:23,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [116840220] [2021-12-06 19:36:23,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:36:23,745 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 19:36:23,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 19:36:23,746 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 19:36:23,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2021-12-06 19:36:25,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-06 19:36:25,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:36:25,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-06 19:36:25,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:36:25,711 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 19:36:26,017 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 19:36:26,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-12-06 19:36:26,023 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 19:36:26,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:26,248 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 19:36:26,264 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 19:36:26,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 36 [2021-12-06 19:36:26,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:26,460 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 19:36:26,479 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 19:36:26,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 39 [2021-12-06 19:36:26,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:26,706 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 19:36:26,721 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 19:36:26,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 36 [2021-12-06 19:36:26,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:26,873 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 19:36:26,881 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:36:26,881 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 19:36:29,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:29,016 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 19:36:29,024 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:36:29,024 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 25 [2021-12-06 19:36:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 25 proven. 119 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-12-06 19:36:29,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:36:29,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [116840220] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:36:29,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:36:29,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 22 [2021-12-06 19:36:29,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275791963] [2021-12-06 19:36:29,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:36:29,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 19:36:29,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:36:29,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 19:36:29,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=525, Unknown=2, NotChecked=0, Total=600 [2021-12-06 19:36:29,612 INFO L87 Difference]: Start difference. First operand 219 states and 254 transitions. Second operand has 23 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 7 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (11), 11 states have call predecessors, (11), 7 states have call successors, (11) [2021-12-06 19:36:30,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:36:30,684 INFO L93 Difference]: Finished difference Result 320 states and 358 transitions. [2021-12-06 19:36:30,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 19:36:30,685 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 7 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (11), 11 states have call predecessors, (11), 7 states have call successors, (11) Word has length 100 [2021-12-06 19:36:30,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:36:30,686 INFO L225 Difference]: With dead ends: 320 [2021-12-06 19:36:30,686 INFO L226 Difference]: Without dead ends: 320 [2021-12-06 19:36:30,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 168 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=91, Invalid=663, Unknown=2, NotChecked=0, Total=756 [2021-12-06 19:36:30,687 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 97 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:36:30,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 1036 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 908 Invalid, 0 Unknown, 69 Unchecked, 0.9s Time] [2021-12-06 19:36:30,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-12-06 19:36:30,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 219. [2021-12-06 19:36:30,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 193 states have (on average 1.160621761658031) internal successors, (224), 198 states have internal predecessors, (224), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-06 19:36:30,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 253 transitions. [2021-12-06 19:36:30,691 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 253 transitions. Word has length 100 [2021-12-06 19:36:30,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:36:30,691 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 253 transitions. [2021-12-06 19:36:30,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 7 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (11), 11 states have call predecessors, (11), 7 states have call successors, (11) [2021-12-06 19:36:30,691 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 253 transitions. [2021-12-06 19:36:30,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-06 19:36:30,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:30,692 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:36:30,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2021-12-06 19:36:30,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2021-12-06 19:36:31,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 19:36:31,094 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:36:31,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:31,095 INFO L85 PathProgramCache]: Analyzing trace with hash -2024931585, now seen corresponding path program 2 times [2021-12-06 19:36:31,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:36:31,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435558996] [2021-12-06 19:36:31,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:36:31,097 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:36:31,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:36:31,099 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:36:31,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-12-06 19:36:31,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:36:31,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:36:31,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 19:36:31,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:36:31,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:36:31,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:31,837 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 28 treesize of output 27 [2021-12-06 19:36:31,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:31,980 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 23 treesize of output 22 [2021-12-06 19:36:32,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:32,221 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 23 treesize of output 22 [2021-12-06 19:36:32,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:32,315 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 23 treesize of output 22 [2021-12-06 19:36:32,379 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 19:36:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 12 proven. 59 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-12-06 19:36:32,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:36:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-12-06 19:36:33,931 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:36:33,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435558996] [2021-12-06 19:36:33,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435558996] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:36:33,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:36:33,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 27 [2021-12-06 19:36:33,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497324045] [2021-12-06 19:36:33,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:36:33,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 19:36:33,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:36:33,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 19:36:33,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-12-06 19:36:33,932 INFO L87 Difference]: Start difference. First operand 219 states and 253 transitions. Second operand has 28 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 25 states have internal predecessors, (100), 8 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-06 19:36:39,683 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:36:41,699 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:36:49,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:36:49,467 INFO L93 Difference]: Finished difference Result 293 states and 310 transitions. [2021-12-06 19:36:49,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-06 19:36:49,471 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 25 states have internal predecessors, (100), 8 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) Word has length 98 [2021-12-06 19:36:49,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:36:49,472 INFO L225 Difference]: With dead ends: 293 [2021-12-06 19:36:49,472 INFO L226 Difference]: Without dead ends: 293 [2021-12-06 19:36:49,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 168 SyntacticMatches, 9 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1859 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=919, Invalid=5561, Unknown=0, NotChecked=0, Total=6480 [2021-12-06 19:36:49,473 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 466 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 144 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:36:49,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 543 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1117 Invalid, 2 Unknown, 92 Unchecked, 7.0s Time] [2021-12-06 19:36:49,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-12-06 19:36:49,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 220. [2021-12-06 19:36:49,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 194 states have (on average 1.1443298969072164) internal successors, (222), 199 states have internal predecessors, (222), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-06 19:36:49,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 251 transitions. [2021-12-06 19:36:49,477 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 251 transitions. Word has length 98 [2021-12-06 19:36:49,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:36:49,477 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 251 transitions. [2021-12-06 19:36:49,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 25 states have internal predecessors, (100), 8 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-06 19:36:49,477 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 251 transitions. [2021-12-06 19:36:49,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 19:36:49,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:36:49,478 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:36:49,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2021-12-06 19:36:49,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:36:49,679 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:36:49,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:36:49,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1651630408, now seen corresponding path program 3 times [2021-12-06 19:36:49,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:36:49,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467370170] [2021-12-06 19:36:49,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:36:49,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:36:49,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:36:49,683 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:36:49,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-12-06 19:36:50,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 19:36:50,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:36:50,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 19:36:50,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:36:50,455 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 19:36:50,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:36:50,579 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 16 treesize of output 10 [2021-12-06 19:36:50,647 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-06 19:36:50,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 44 [2021-12-06 19:36:50,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:50,762 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 36 treesize of output 31 [2021-12-06 19:36:50,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-12-06 19:36:51,033 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-06 19:36:51,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 39 [2021-12-06 19:36:51,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:51,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:51,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:51,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:36:51,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 50 [2021-12-06 19:36:51,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-12-06 19:36:52,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:52,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-12-06 19:36:52,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:36:52,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:52,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:52,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:52,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:36:52,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 56 [2021-12-06 19:36:52,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:52,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-12-06 19:36:52,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:52,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:36:52,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:36:52,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 47 [2021-12-06 19:36:52,668 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 19:36:52,778 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 20 proven. 65 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-06 19:36:52,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:36:55,595 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:36:55,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467370170] [2021-12-06 19:36:55,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467370170] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:36:55,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2091028439] [2021-12-06 19:36:55,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:36:55,596 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 19:36:55,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 19:36:55,596 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 19:36:55,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2021-12-06 19:36:56,021 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:36:56,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819646314] [2021-12-06 19:36:56,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:36:56,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:36:56,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:36:56,022 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:36:56,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-06 19:36:56,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (61)] Ended with exit code 1 [2021-12-06 19:36:56,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 19:36:56,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:36:56,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-06 19:36:56,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:36:56,904 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 19:36:57,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:36:57,355 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 15 treesize of output 9 [2021-12-06 19:36:57,414 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-06 19:36:57,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 43 [2021-12-06 19:36:57,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:57,725 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 36 treesize of output 31 [2021-12-06 19:36:58,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-12-06 19:36:58,201 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-06 19:36:58,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 41 [2021-12-06 19:36:58,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:58,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:58,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:58,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:36:58,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 46 [2021-12-06 19:36:59,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-12-06 19:36:59,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:59,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-12-06 19:36:59,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:59,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:36:59,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:59,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:36:59,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:36:59,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 56 [2021-12-06 19:37:00,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:00,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-12-06 19:37:00,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:00,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:00,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:37:00,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:00,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:37:00,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 55 [2021-12-06 19:37:00,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:37:00,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 21 [2021-12-06 19:37:00,646 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 20 proven. 65 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-06 19:37:00,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:03,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819646314] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:37:03,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:37:03,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33] total 53 [2021-12-06 19:37:03,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797721183] [2021-12-06 19:37:03,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:37:03,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-06 19:37:03,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:37:03,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-06 19:37:03,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=5190, Unknown=0, NotChecked=0, Total=5550 [2021-12-06 19:37:03,668 INFO L87 Difference]: Start difference. First operand 220 states and 251 transitions. Second operand has 54 states, 52 states have (on average 1.9038461538461537) internal successors, (99), 46 states have internal predecessors, (99), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 19:37:04,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:04,295 INFO L93 Difference]: Finished difference Result 220 states and 250 transitions. [2021-12-06 19:37:04,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 19:37:04,296 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 52 states have (on average 1.9038461538461537) internal successors, (99), 46 states have internal predecessors, (99), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 99 [2021-12-06 19:37:04,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:04,297 INFO L225 Difference]: With dead ends: 220 [2021-12-06 19:37:04,298 INFO L226 Difference]: Without dead ends: 220 [2021-12-06 19:37:04,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 155 SyntacticMatches, 15 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2602 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=397, Invalid=5923, Unknown=0, NotChecked=0, Total=6320 [2021-12-06 19:37:04,299 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 22 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 415 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:04,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 730 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 0 Unknown, 415 Unchecked, 0.2s Time] [2021-12-06 19:37:04,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-06 19:37:04,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2021-12-06 19:37:04,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 194 states have (on average 1.1391752577319587) internal successors, (221), 199 states have internal predecessors, (221), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-06 19:37:04,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 250 transitions. [2021-12-06 19:37:04,303 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 250 transitions. Word has length 99 [2021-12-06 19:37:04,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:04,303 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 250 transitions. [2021-12-06 19:37:04,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 52 states have (on average 1.9038461538461537) internal successors, (99), 46 states have internal predecessors, (99), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 19:37:04,303 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 250 transitions. [2021-12-06 19:37:04,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-06 19:37:04,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:04,304 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:04,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-12-06 19:37:04,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (60)] Ended with exit code 0 [2021-12-06 19:37:04,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:37:04,705 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:37:04,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:04,706 INFO L85 PathProgramCache]: Analyzing trace with hash -339064798, now seen corresponding path program 2 times [2021-12-06 19:37:04,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:37:04,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1149915494] [2021-12-06 19:37:04,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:37:04,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:37:04,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:37:04,711 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:37:04,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-12-06 19:37:05,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:37:05,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:37:05,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 19:37:05,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:05,114 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 19:37:05,335 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:37:05,335 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 24 treesize of output 24 [2021-12-06 19:37:05,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:37:07,481 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_111| (_ BitVec 32))) (not (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_111| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_111|) (_ bv0 32))))) is different from true [2021-12-06 19:37:07,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:07,551 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 29 treesize of output 28 [2021-12-06 19:37:09,608 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_112| (_ BitVec 32))) (not (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_112| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_112|) (_ bv0 32))))) is different from true [2021-12-06 19:37:09,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:09,678 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 29 treesize of output 28 [2021-12-06 19:37:11,724 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_113| (_ BitVec 32))) (not (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_113| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_113|) (_ bv0 32))))) is different from true [2021-12-06 19:37:11,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:11,852 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 24 treesize of output 23 [2021-12-06 19:37:11,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:11,949 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 24 treesize of output 23 [2021-12-06 19:37:12,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-06 19:37:12,098 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 19 treesize of output 21 [2021-12-06 19:37:12,129 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 145 trivial. 30 not checked. [2021-12-06 19:37:12,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:12,528 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 44 treesize of output 40 [2021-12-06 19:37:13,204 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:37:13,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1149915494] [2021-12-06 19:37:13,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1149915494] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:37:13,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2020469940] [2021-12-06 19:37:13,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:37:13,204 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 19:37:13,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 19:37:13,205 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 19:37:13,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2021-12-06 19:37:14,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:37:14,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:37:14,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 19:37:14,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:14,979 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 19:37:15,274 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:37:15,274 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 19:37:15,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:37:17,324 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_115| (_ BitVec 32))) (not (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_115| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_115|) (_ bv0 32))))) is different from true [2021-12-06 19:37:17,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:17,396 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 29 treesize of output 28 [2021-12-06 19:37:19,435 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_116| (_ BitVec 32))) (not (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_116| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_116|) (_ bv0 32))))) is different from true [2021-12-06 19:37:19,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:19,512 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 29 treesize of output 28 [2021-12-06 19:37:21,564 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_117| (_ BitVec 32))) (not (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_117| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_117|) (_ bv0 32))))) is different from true [2021-12-06 19:37:21,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:21,671 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 24 treesize of output 23 [2021-12-06 19:37:21,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:21,719 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 24 treesize of output 23 [2021-12-06 19:37:21,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-06 19:37:21,800 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 19 treesize of output 21 [2021-12-06 19:37:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 8 proven. 104 refuted. 0 times theorem prover too weak. 92 trivial. 30 not checked. [2021-12-06 19:37:21,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:21,922 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 36 treesize of output 32 [2021-12-06 19:37:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 2 proven. 69 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-06 19:37:23,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2020469940] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:37:23,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:37:23,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 17] total 41 [2021-12-06 19:37:23,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475100924] [2021-12-06 19:37:23,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:37:23,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 19:37:23,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:37:23,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 19:37:23,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1594, Unknown=6, NotChecked=510, Total=2256 [2021-12-06 19:37:23,866 INFO L87 Difference]: Start difference. First operand 220 states and 250 transitions. Second operand has 42 states, 41 states have (on average 3.2195121951219514) internal successors, (132), 38 states have internal predecessors, (132), 9 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2021-12-06 19:37:42,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:37:43,912 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:37:45,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:45,891 INFO L93 Difference]: Finished difference Result 249 states and 274 transitions. [2021-12-06 19:37:45,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 19:37:45,891 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.2195121951219514) internal successors, (132), 38 states have internal predecessors, (132), 9 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) Word has length 100 [2021-12-06 19:37:45,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:45,893 INFO L225 Difference]: With dead ends: 249 [2021-12-06 19:37:45,893 INFO L226 Difference]: Without dead ends: 249 [2021-12-06 19:37:45,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 256 SyntacticMatches, 21 SemanticMatches, 72 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=382, Invalid=4190, Unknown=8, NotChecked=822, Total=5402 [2021-12-06 19:37:45,894 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 117 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 2198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 705 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:45,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 1001 Invalid, 2198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1452 Invalid, 0 Unknown, 705 Unchecked, 5.4s Time] [2021-12-06 19:37:45,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-12-06 19:37:45,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 224. [2021-12-06 19:37:45,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 198 states have (on average 1.1363636363636365) internal successors, (225), 203 states have internal predecessors, (225), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-06 19:37:45,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 254 transitions. [2021-12-06 19:37:45,899 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 254 transitions. Word has length 100 [2021-12-06 19:37:45,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:45,899 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 254 transitions. [2021-12-06 19:37:45,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.2195121951219514) internal successors, (132), 38 states have internal predecessors, (132), 9 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2021-12-06 19:37:45,900 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 254 transitions. [2021-12-06 19:37:45,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 19:37:45,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:45,900 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:45,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2021-12-06 19:37:46,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2021-12-06 19:37:46,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 19:37:46,302 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:37:46,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:46,303 INFO L85 PathProgramCache]: Analyzing trace with hash -636193588, now seen corresponding path program 4 times [2021-12-06 19:37:46,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:37:46,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613235786] [2021-12-06 19:37:46,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:37:46,306 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:37:46,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:37:46,308 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:37:46,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-12-06 19:37:46,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:37:46,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:37:46,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 19:37:46,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:46,879 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 19:37:46,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:37:47,038 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 19 treesize of output 13 [2021-12-06 19:37:47,118 INFO L354 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2021-12-06 19:37:47,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 49 [2021-12-06 19:37:47,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:47,271 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 40 treesize of output 33 [2021-12-06 19:37:47,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-12-06 19:37:47,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:47,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-12-06 19:37:47,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:47,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:37:47,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:37:47,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 44 [2021-12-06 19:37:48,072 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 22 [2021-12-06 19:37:48,155 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 30 proven. 148 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 19:37:48,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:49,092 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:37:49,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613235786] [2021-12-06 19:37:49,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613235786] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:37:49,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [56593593] [2021-12-06 19:37:49,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:37:49,092 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 19:37:49,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 19:37:49,093 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 19:37:49,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2021-12-06 19:37:50,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:37:50,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:37:50,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 19:37:50,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:50,894 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 19:37:50,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:37:50,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-12-06 19:37:51,022 INFO L354 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2021-12-06 19:37:51,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 50 [2021-12-06 19:37:51,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:51,120 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 40 treesize of output 33 [2021-12-06 19:37:51,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-12-06 19:37:51,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:51,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-12-06 19:37:51,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:51,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:37:51,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:37:51,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 46 [2021-12-06 19:37:51,560 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 22 [2021-12-06 19:37:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 30 proven. 148 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 19:37:51,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:51,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [56593593] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:37:51,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:37:51,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-12-06 19:37:51,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104073315] [2021-12-06 19:37:51,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:37:51,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 19:37:51,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:37:51,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 19:37:51,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1032, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 19:37:51,958 INFO L87 Difference]: Start difference. First operand 224 states and 254 transitions. Second operand has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 26 states have internal predecessors, (71), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 19:37:52,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:52,833 INFO L93 Difference]: Finished difference Result 260 states and 290 transitions. [2021-12-06 19:37:52,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 19:37:52,834 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 26 states have internal predecessors, (71), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 102 [2021-12-06 19:37:52,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:52,835 INFO L225 Difference]: With dead ends: 260 [2021-12-06 19:37:52,835 INFO L226 Difference]: Without dead ends: 260 [2021-12-06 19:37:52,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 193 SyntacticMatches, 12 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=146, Invalid=1834, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 19:37:52,836 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 42 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 522 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:52,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 992 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 473 Invalid, 0 Unknown, 522 Unchecked, 0.5s Time] [2021-12-06 19:37:52,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-06 19:37:52,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 245. [2021-12-06 19:37:52,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 217 states have (on average 1.1290322580645162) internal successors, (245), 222 states have internal predecessors, (245), 11 states have call successors, (11), 7 states have call predecessors, (11), 10 states have return successors, (18), 15 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-06 19:37:52,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 274 transitions. [2021-12-06 19:37:52,839 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 274 transitions. Word has length 102 [2021-12-06 19:37:52,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:52,840 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 274 transitions. [2021-12-06 19:37:52,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 26 states have internal predecessors, (71), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 19:37:52,840 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 274 transitions. [2021-12-06 19:37:52,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 19:37:52,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:52,841 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:52,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (66)] Ended with exit code 0 [2021-12-06 19:37:53,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (65)] Ended with exit code 0 [2021-12-06 19:37:53,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:37:53,241 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:37:53,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:53,242 INFO L85 PathProgramCache]: Analyzing trace with hash 683730192, now seen corresponding path program 4 times [2021-12-06 19:37:53,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:37:53,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721792055] [2021-12-06 19:37:53,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:37:53,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:37:53,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:37:53,245 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:37:53,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-12-06 19:37:53,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:37:53,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:37:53,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 19:37:53,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:53,655 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 3 proven. 54 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-12-06 19:37:53,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:37:53,977 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 3 proven. 54 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-12-06 19:37:53,977 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:37:53,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721792055] [2021-12-06 19:37:53,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721792055] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:37:53,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:37:53,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-06 19:37:53,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552805894] [2021-12-06 19:37:53,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:37:53,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 19:37:53,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:37:53,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 19:37:53,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-12-06 19:37:53,978 INFO L87 Difference]: Start difference. First operand 245 states and 274 transitions. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 19:37:54,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:37:54,387 INFO L93 Difference]: Finished difference Result 243 states and 260 transitions. [2021-12-06 19:37:54,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 19:37:54,387 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 103 [2021-12-06 19:37:54,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:37:54,388 INFO L225 Difference]: With dead ends: 243 [2021-12-06 19:37:54,388 INFO L226 Difference]: Without dead ends: 243 [2021-12-06 19:37:54,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-12-06 19:37:54,389 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 79 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:37:54,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 623 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:37:54,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-06 19:37:54,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 228. [2021-12-06 19:37:54,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 200 states have (on average 1.09) internal successors, (218), 205 states have internal predecessors, (218), 11 states have call successors, (11), 7 states have call predecessors, (11), 10 states have return successors, (18), 15 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-06 19:37:54,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 247 transitions. [2021-12-06 19:37:54,392 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 247 transitions. Word has length 103 [2021-12-06 19:37:54,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:37:54,393 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 247 transitions. [2021-12-06 19:37:54,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 19:37:54,393 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 247 transitions. [2021-12-06 19:37:54,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-06 19:37:54,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:37:54,394 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:37:54,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (67)] Ended with exit code 0 [2021-12-06 19:37:54,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:37:54,594 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:37:54,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:37:54,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1238091216, now seen corresponding path program 6 times [2021-12-06 19:37:54,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:37:54,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290167235] [2021-12-06 19:37:54,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:37:54,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:37:54,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:37:54,597 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:37:54,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2021-12-06 19:37:55,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-12-06 19:37:55,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:37:55,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-06 19:37:55,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:37:55,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:37:57,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:57,798 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 19:37:57,809 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:37:57,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 19:37:59,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:37:59,975 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 19:37:59,983 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:37:59,983 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 19:38:06,255 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:38:06,256 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 19:38:06,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:06,610 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-06 19:38:06,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 30 [2021-12-06 19:38:06,622 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:38:06,622 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 26 [2021-12-06 19:38:06,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:06,917 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 18 treesize of output 18 [2021-12-06 19:38:06,926 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:38:06,926 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 24 treesize of output 24 [2021-12-06 19:38:07,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:07,184 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 19:38:07,192 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:38:07,193 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 19:38:07,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:07,442 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 19:38:07,451 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:38:07,451 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 24 treesize of output 24 [2021-12-06 19:38:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 91 proven. 160 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-06 19:38:07,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:38:08,362 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:38:08,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290167235] [2021-12-06 19:38:08,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290167235] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:38:08,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [360004585] [2021-12-06 19:38:08,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:38:08,363 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 19:38:08,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 19:38:08,363 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 19:38:08,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2021-12-06 19:38:09,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-12-06 19:38:09,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:38:09,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-06 19:38:09,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:38:09,736 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 19:38:09,741 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 19:38:10,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:10,185 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 19:38:10,193 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:38:10,193 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 25 [2021-12-06 19:38:10,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:10,329 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 19:38:10,337 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:38:10,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 19:38:10,399 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:38:10,399 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 19:38:10,726 INFO L354 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2021-12-06 19:38:10,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 38 [2021-12-06 19:38:11,390 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:38:11,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 19:38:11,411 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-06 19:38:11,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 30 [2021-12-06 19:38:11,742 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:38:11,742 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 19:38:11,757 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:38:11,757 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 24 treesize of output 24 [2021-12-06 19:38:12,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:12,021 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 19:38:12,028 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:38:12,029 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 19:38:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 25 proven. 177 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-12-06 19:38:12,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:38:13,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [360004585] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:38:13,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:38:13,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32] total 41 [2021-12-06 19:38:13,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002304110] [2021-12-06 19:38:13,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:38:13,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 19:38:13,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:38:13,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 19:38:13,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1755, Unknown=4, NotChecked=0, Total=1892 [2021-12-06 19:38:13,006 INFO L87 Difference]: Start difference. First operand 228 states and 247 transitions. Second operand has 42 states, 40 states have (on average 1.95) internal successors, (78), 36 states have internal predecessors, (78), 10 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-06 19:38:19,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:38:19,144 INFO L93 Difference]: Finished difference Result 314 states and 338 transitions. [2021-12-06 19:38:19,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 19:38:19,145 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 1.95) internal successors, (78), 36 states have internal predecessors, (78), 10 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) Word has length 110 [2021-12-06 19:38:19,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:38:19,146 INFO L225 Difference]: With dead ends: 314 [2021-12-06 19:38:19,146 INFO L226 Difference]: Without dead ends: 314 [2021-12-06 19:38:19,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 172 SyntacticMatches, 12 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=238, Invalid=3178, Unknown=6, NotChecked=0, Total=3422 [2021-12-06 19:38:19,147 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 117 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1675 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:38:19,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 1675 Invalid, 1876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1371 Invalid, 0 Unknown, 469 Unchecked, 1.4s Time] [2021-12-06 19:38:19,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-12-06 19:38:19,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 228. [2021-12-06 19:38:19,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 200 states have (on average 1.085) internal successors, (217), 205 states have internal predecessors, (217), 11 states have call successors, (11), 7 states have call predecessors, (11), 10 states have return successors, (18), 15 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-06 19:38:19,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 246 transitions. [2021-12-06 19:38:19,151 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 246 transitions. Word has length 110 [2021-12-06 19:38:19,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:38:19,151 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 246 transitions. [2021-12-06 19:38:19,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 1.95) internal successors, (78), 36 states have internal predecessors, (78), 10 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-06 19:38:19,151 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 246 transitions. [2021-12-06 19:38:19,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-06 19:38:19,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:38:19,152 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:38:19,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (68)] Ended with exit code 0 [2021-12-06 19:38:19,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (69)] Ended with exit code 0 [2021-12-06 19:38:19,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 19:38:19,554 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:38:19,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:38:19,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1918735380, now seen corresponding path program 5 times [2021-12-06 19:38:19,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:38:19,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891232377] [2021-12-06 19:38:19,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:38:19,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:38:19,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:38:19,558 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:38:19,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2021-12-06 19:38:20,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-06 19:38:20,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:38:20,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-06 19:38:20,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:38:20,462 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 19:38:20,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:38:20,614 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 18 treesize of output 12 [2021-12-06 19:38:20,682 INFO L354 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2021-12-06 19:38:20,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 50 [2021-12-06 19:38:20,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:20,836 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 42 treesize of output 35 [2021-12-06 19:38:21,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-12-06 19:38:21,178 INFO L354 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2021-12-06 19:38:21,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 48 [2021-12-06 19:38:21,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:21,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:21,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:21,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:38:21,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 48 [2021-12-06 19:38:21,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-12-06 19:38:22,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:22,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-12-06 19:38:22,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:22,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:22,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:38:22,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:22,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:38:22,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 57 [2021-12-06 19:38:23,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:23,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2021-12-06 19:38:23,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:38:23,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:23,402 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:38:23,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 44 [2021-12-06 19:38:23,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-06 19:38:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 34 proven. 164 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-06 19:38:23,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:38:26,452 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:38:26,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891232377] [2021-12-06 19:38:26,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891232377] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:38:26,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [286017789] [2021-12-06 19:38:26,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:38:26,452 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 19:38:26,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 19:38:26,453 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 19:38:26,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2021-12-06 19:38:28,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-06 19:38:28,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:38:28,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 98 conjunts are in the unsatisfiable core [2021-12-06 19:38:28,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:38:29,079 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 19:38:32,370 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 19:38:32,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 36 [2021-12-06 19:38:32,376 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 14 treesize of output 16 [2021-12-06 19:38:32,971 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 19:38:32,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 37 [2021-12-06 19:38:32,982 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 14 treesize of output 16 [2021-12-06 19:38:33,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:38:33,949 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 7 treesize of output 5 [2021-12-06 19:38:33,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-12-06 19:38:42,472 INFO L354 Elim1Store]: treesize reduction 57, result has 43.0 percent of original size [2021-12-06 19:38:42,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 59 treesize of output 85 [2021-12-06 19:38:42,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 19:38:43,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:43,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 44 [2021-12-06 19:38:44,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-12-06 19:38:44,214 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 7 treesize of output 5 [2021-12-06 19:38:44,870 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:38:44,870 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 14 treesize of output 20 [2021-12-06 19:38:44,949 INFO L354 Elim1Store]: treesize reduction 48, result has 43.5 percent of original size [2021-12-06 19:38:44,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 59 treesize of output 82 [2021-12-06 19:38:46,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:46,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:46,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:46,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 54 [2021-12-06 19:38:47,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2021-12-06 19:38:47,306 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 7 treesize of output 5 [2021-12-06 19:38:50,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:50,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:50,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 60 [2021-12-06 19:38:50,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:50,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:50,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:50,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:50,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:50,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:38:50,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 60 [2021-12-06 19:38:52,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:52,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:52,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 64 [2021-12-06 19:38:52,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:38:52,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:38:52,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 47 [2021-12-06 19:38:53,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2021-12-06 19:38:53,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-12-06 19:38:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 31 proven. 241 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:38:53,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:39:03,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [286017789] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:39:03,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:39:03,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 49] total 83 [2021-12-06 19:39:03,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825135910] [2021-12-06 19:39:03,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:39:03,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-06 19:39:03,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:39:03,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-06 19:39:03,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=10444, Unknown=2, NotChecked=0, Total=10920 [2021-12-06 19:39:03,597 INFO L87 Difference]: Start difference. First operand 228 states and 246 transitions. Second operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 76 states have internal predecessors, (171), 11 states have call successors, (11), 8 states have call predecessors, (11), 12 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2021-12-06 19:39:20,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:39:20,396 INFO L93 Difference]: Finished difference Result 235 states and 254 transitions. [2021-12-06 19:39:20,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-06 19:39:20,397 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 76 states have internal predecessors, (171), 11 states have call successors, (11), 8 states have call predecessors, (11), 12 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) Word has length 109 [2021-12-06 19:39:20,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:39:20,398 INFO L225 Difference]: With dead ends: 235 [2021-12-06 19:39:20,398 INFO L226 Difference]: Without dead ends: 235 [2021-12-06 19:39:20,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 152 SyntacticMatches, 10 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5389 ImplicationChecksByTransitivity, 49.8s TimeCoverageRelationStatistics Valid=593, Invalid=12741, Unknown=6, NotChecked=0, Total=13340 [2021-12-06 19:39:20,399 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 53 mSDsluCounter, 1446 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1499 SdHoareTripleChecker+Invalid, 2304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1568 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:39:20,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 1499 Invalid, 2304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 725 Invalid, 0 Unknown, 1568 Unchecked, 0.9s Time] [2021-12-06 19:39:20,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-12-06 19:39:20,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2021-12-06 19:39:20,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 207 states have (on average 1.0869565217391304) internal successors, (225), 212 states have internal predecessors, (225), 11 states have call successors, (11), 7 states have call predecessors, (11), 10 states have return successors, (18), 15 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-06 19:39:20,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 254 transitions. [2021-12-06 19:39:20,403 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 254 transitions. Word has length 109 [2021-12-06 19:39:20,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:39:20,403 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 254 transitions. [2021-12-06 19:39:20,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 76 states have internal predecessors, (171), 11 states have call successors, (11), 8 states have call predecessors, (11), 12 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2021-12-06 19:39:20,403 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 254 transitions. [2021-12-06 19:39:20,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-06 19:39:20,404 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:39:20,404 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:39:20,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (71)] Ended with exit code 0 [2021-12-06 19:39:20,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (70)] Ended with exit code 0 [2021-12-06 19:39:20,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:39:20,805 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:39:20,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:39:20,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1206104089, now seen corresponding path program 4 times [2021-12-06 19:39:20,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:39:20,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [888644304] [2021-12-06 19:39:20,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:39:20,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:39:20,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:39:20,810 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:39:20,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2021-12-06 19:39:21,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:39:21,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:39:21,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-06 19:39:21,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:39:22,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:39:22,226 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 19:39:22,226 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 61 treesize of output 53 [2021-12-06 19:39:28,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:39:28,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 67 [2021-12-06 19:39:29,401 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-12-06 19:39:29,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 319 treesize of output 299 [2021-12-06 19:39:30,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:39:30,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:39:30,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:39:30,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 114 [2021-12-06 19:39:31,734 INFO L354 Elim1Store]: treesize reduction 79, result has 7.1 percent of original size [2021-12-06 19:39:31,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 482 treesize of output 468 [2021-12-06 19:39:35,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:39:35,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:39:35,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:39:35,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 131 [2021-12-06 19:39:40,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:39:40,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:39:40,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:39:40,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 143 [2021-12-06 19:39:41,473 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 151 treesize of output 127 [2021-12-06 19:40:06,241 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 18 proven. 127 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-06 19:40:06,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:40:15,386 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:40:15,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [888644304] [2021-12-06 19:40:15,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [888644304] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:40:15,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1286835583] [2021-12-06 19:40:15,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:40:15,387 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 19:40:15,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 19:40:15,387 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 19:40:15,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2021-12-06 19:40:17,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:40:17,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:40:17,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-06 19:40:17,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:40:31,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:40:32,595 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-12-06 19:40:32,595 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 74 treesize of output 64 [2021-12-06 19:40:41,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:40:41,757 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 74 treesize of output 65 [2021-12-06 19:40:42,630 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-12-06 19:40:42,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 179 [2021-12-06 19:40:44,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:40:44,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:40:44,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:40:44,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 108 [2021-12-06 19:40:46,127 INFO L354 Elim1Store]: treesize reduction 128, result has 0.8 percent of original size [2021-12-06 19:40:46,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 670 treesize of output 642 [2021-12-06 19:40:50,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:40:50,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:40:50,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:40:50,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 116 [2021-12-06 19:40:55,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:40:55,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:40:55,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:40:55,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 113 [2021-12-06 19:41:02,399 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 123 treesize of output 103 [2021-12-06 19:41:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 20 proven. 125 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-06 19:41:31,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:41:39,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1286835583] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:41:39,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:41:39,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 74 [2021-12-06 19:41:39,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824708305] [2021-12-06 19:41:39,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:41:39,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-06 19:41:39,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:41:39,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-06 19:41:39,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=7864, Unknown=32, NotChecked=0, Total=8190 [2021-12-06 19:41:39,077 INFO L87 Difference]: Start difference. First operand 235 states and 254 transitions. Second operand has 75 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 67 states have internal predecessors, (148), 10 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 19:42:22,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:22,169 INFO L93 Difference]: Finished difference Result 242 states and 260 transitions. [2021-12-06 19:42:22,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 19:42:22,170 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 67 states have internal predecessors, (148), 10 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 109 [2021-12-06 19:42:22,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:22,171 INFO L225 Difference]: With dead ends: 242 [2021-12-06 19:42:22,171 INFO L226 Difference]: Without dead ends: 208 [2021-12-06 19:42:22,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 181 SyntacticMatches, 16 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3545 ImplicationChecksByTransitivity, 147.7s TimeCoverageRelationStatistics Valid=451, Invalid=12845, Unknown=44, NotChecked=0, Total=13340 [2021-12-06 19:42:22,172 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 16 mSDsluCounter, 1226 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 811 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:22,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 1262 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 811 Unchecked, 0.0s Time] [2021-12-06 19:42:22,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-06 19:42:22,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2021-12-06 19:42:22,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 181 states have (on average 1.0939226519337018) internal successors, (198), 186 states have internal predecessors, (198), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2021-12-06 19:42:22,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 226 transitions. [2021-12-06 19:42:22,175 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 226 transitions. Word has length 109 [2021-12-06 19:42:22,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:22,175 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 226 transitions. [2021-12-06 19:42:22,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 67 states have internal predecessors, (148), 10 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 19:42:22,175 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 226 transitions. [2021-12-06 19:42:22,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 19:42:22,176 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:22,176 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:22,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (73)] Ended with exit code 0 [2021-12-06 19:42:22,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (72)] Ended with exit code 0 [2021-12-06 19:42:22,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:42:22,578 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:42:22,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:22,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1886372224, now seen corresponding path program 6 times [2021-12-06 19:42:22,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:42:22,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958140707] [2021-12-06 19:42:22,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:42:22,581 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:42:22,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:42:22,583 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:42:22,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2021-12-06 19:42:23,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-06 19:42:23,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:42:23,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 19:42:23,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:42:23,331 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 19:42:23,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:42:23,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 11 [2021-12-06 19:42:23,663 INFO L354 Elim1Store]: treesize reduction 42, result has 42.5 percent of original size [2021-12-06 19:42:23,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 56 [2021-12-06 19:42:23,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:42:23,978 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 46 treesize of output 36 [2021-12-06 19:42:24,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-12-06 19:42:25,522 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 38 treesize of output 40 [2021-12-06 19:42:25,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:42:25,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:42:25,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2021-12-06 19:42:26,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:42:26,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:42:26,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 23 [2021-12-06 19:42:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 92 proven. 21 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-12-06 19:42:26,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:42:29,262 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:42:29,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958140707] [2021-12-06 19:42:29,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958140707] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:42:29,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1483987458] [2021-12-06 19:42:29,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:42:29,262 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 19:42:29,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 19:42:29,263 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 19:42:29,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2021-12-06 19:42:29,653 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:42:29,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047019506] [2021-12-06 19:42:29,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:42:29,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:42:29,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:42:29,654 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:42:29,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-12-06 19:42:29,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (75)] Ended with exit code 1 [2021-12-06 19:42:32,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-06 19:42:32,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:42:32,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 19:42:32,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:42:32,948 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 19:42:32,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:42:33,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 11 [2021-12-06 19:42:33,355 INFO L354 Elim1Store]: treesize reduction 42, result has 42.5 percent of original size [2021-12-06 19:42:33,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 52 [2021-12-06 19:42:33,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:42:33,799 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 52 treesize of output 42 [2021-12-06 19:42:34,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 16 [2021-12-06 19:42:40,716 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 40 treesize of output 42 [2021-12-06 19:42:40,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:42:40,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:42:40,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 44 [2021-12-06 19:42:41,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:42:41,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:42:41,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 29 [2021-12-06 19:42:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 92 proven. 21 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-12-06 19:42:41,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:42:43,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047019506] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:42:43,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:42:43,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-12-06 19:42:43,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642166102] [2021-12-06 19:42:43,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:42:43,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 19:42:43,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:42:43,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 19:42:43,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1277, Unknown=2, NotChecked=0, Total=1406 [2021-12-06 19:42:43,339 INFO L87 Difference]: Start difference. First operand 208 states and 226 transitions. Second operand has 30 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 27 states have internal predecessors, (73), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-06 19:42:54,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:54,348 INFO L93 Difference]: Finished difference Result 213 states and 230 transitions. [2021-12-06 19:42:54,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 19:42:54,350 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 27 states have internal predecessors, (73), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 112 [2021-12-06 19:42:54,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:54,351 INFO L225 Difference]: With dead ends: 213 [2021-12-06 19:42:54,351 INFO L226 Difference]: Without dead ends: 213 [2021-12-06 19:42:54,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 213 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=206, Invalid=2142, Unknown=4, NotChecked=0, Total=2352 [2021-12-06 19:42:54,351 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 17 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 427 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:54,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 735 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 427 Unchecked, 0.3s Time] [2021-12-06 19:42:54,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-12-06 19:42:54,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 208. [2021-12-06 19:42:54,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 181 states have (on average 1.0883977900552486) internal successors, (197), 186 states have internal predecessors, (197), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2021-12-06 19:42:54,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 225 transitions. [2021-12-06 19:42:54,354 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 225 transitions. Word has length 112 [2021-12-06 19:42:54,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:54,355 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 225 transitions. [2021-12-06 19:42:54,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 27 states have internal predecessors, (73), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-06 19:42:54,355 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 225 transitions. [2021-12-06 19:42:54,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 19:42:54,355 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:54,356 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:54,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (74)] Ended with exit code 0 [2021-12-06 19:42:54,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-12-06 19:42:54,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:42:54,757 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:42:54,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:54,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1513140629, now seen corresponding path program 5 times [2021-12-06 19:42:54,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:42:54,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279705112] [2021-12-06 19:42:54,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:42:54,760 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:42:54,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:42:54,762 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:42:54,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2021-12-06 19:42:55,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-06 19:42:55,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:42:55,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 19:42:55,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:42:55,579 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-12-06 19:42:55,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:42:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-12-06 19:42:56,105 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:42:56,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279705112] [2021-12-06 19:42:56,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279705112] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:42:56,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:42:56,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-12-06 19:42:56,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020128884] [2021-12-06 19:42:56,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:42:56,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 19:42:56,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:42:56,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 19:42:56,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:42:56,106 INFO L87 Difference]: Start difference. First operand 208 states and 225 transitions. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 19:42:59,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:59,579 INFO L93 Difference]: Finished difference Result 474 states and 496 transitions. [2021-12-06 19:42:59,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 19:42:59,580 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 112 [2021-12-06 19:42:59,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:59,582 INFO L225 Difference]: With dead ends: 474 [2021-12-06 19:42:59,582 INFO L226 Difference]: Without dead ends: 474 [2021-12-06 19:42:59,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=664, Invalid=2198, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 19:42:59,582 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 1111 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:59,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1111 Valid, 748 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 19:42:59,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-12-06 19:42:59,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 244. [2021-12-06 19:42:59,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 216 states have (on average 1.125) internal successors, (243), 221 states have internal predecessors, (243), 12 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (19), 15 states have call predecessors, (19), 12 states have call successors, (19) [2021-12-06 19:42:59,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 274 transitions. [2021-12-06 19:42:59,587 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 274 transitions. Word has length 112 [2021-12-06 19:42:59,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:59,587 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 274 transitions. [2021-12-06 19:42:59,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 19:42:59,587 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 274 transitions. [2021-12-06 19:42:59,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-06 19:42:59,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:59,588 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:59,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2021-12-06 19:42:59,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:42:59,789 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:42:59,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:59,790 INFO L85 PathProgramCache]: Analyzing trace with hash 582898140, now seen corresponding path program 5 times [2021-12-06 19:42:59,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:42:59,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [69315920] [2021-12-06 19:42:59,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:42:59,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:42:59,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:42:59,795 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:42:59,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2021-12-06 19:43:00,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-06 19:43:00,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:43:00,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 19:43:00,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:43:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-12-06 19:43:00,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:43:02,426 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 36 treesize of output 32 [2021-12-06 19:43:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-12-06 19:43:07,561 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:43:07,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [69315920] [2021-12-06 19:43:07,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [69315920] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:43:07,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:43:07,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 30 [2021-12-06 19:43:07,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164258013] [2021-12-06 19:43:07,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:43:07,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 19:43:07,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:43:07,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 19:43:07,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-12-06 19:43:07,562 INFO L87 Difference]: Start difference. First operand 244 states and 274 transitions. Second operand has 31 states, 30 states have (on average 3.933333333333333) internal successors, (118), 29 states have internal predecessors, (118), 11 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2021-12-06 19:45:03,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:03,645 INFO L93 Difference]: Finished difference Result 572 states and 589 transitions. [2021-12-06 19:45:03,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-06 19:45:03,646 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.933333333333333) internal successors, (118), 29 states have internal predecessors, (118), 11 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) Word has length 113 [2021-12-06 19:45:03,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:03,648 INFO L225 Difference]: With dead ends: 572 [2021-12-06 19:45:03,649 INFO L226 Difference]: Without dead ends: 572 [2021-12-06 19:45:03,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4310 ImplicationChecksByTransitivity, 110.4s TimeCoverageRelationStatistics Valid=2230, Invalid=11576, Unknown=0, NotChecked=0, Total=13806 [2021-12-06 19:45:03,650 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 2224 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2225 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:03,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2225 Valid, 1328 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2021-12-06 19:45:03,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-12-06 19:45:03,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 264. [2021-12-06 19:45:03,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 236 states have (on average 1.1567796610169492) internal successors, (273), 241 states have internal predecessors, (273), 12 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (19), 15 states have call predecessors, (19), 12 states have call successors, (19) [2021-12-06 19:45:03,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 304 transitions. [2021-12-06 19:45:03,655 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 304 transitions. Word has length 113 [2021-12-06 19:45:03,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:03,655 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 304 transitions. [2021-12-06 19:45:03,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.933333333333333) internal successors, (118), 29 states have internal predecessors, (118), 11 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2021-12-06 19:45:03,655 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 304 transitions. [2021-12-06 19:45:03,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-06 19:45:03,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:03,656 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:45:03,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (78)] Ended with exit code 0 [2021-12-06 19:45:03,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:45:03,856 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 19:45:03,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:03,857 INFO L85 PathProgramCache]: Analyzing trace with hash 889973162, now seen corresponding path program 4 times [2021-12-06 19:45:03,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:45:03,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803760763] [2021-12-06 19:45:03,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:45:03,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:45:03,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:45:03,858 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:45:03,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71af8df6-c88a-4c4e-8ef0-0124f01521b9/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2021-12-06 19:45:04,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:45:04,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:45:04,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 19:45:04,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:45:04,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:45:04,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:45:04,572 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 28 treesize of output 27 [2021-12-06 19:45:04,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:45:04,681 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 23 treesize of output 22 [2021-12-06 19:45:04,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:45:04,793 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 23 treesize of output 22 [2021-12-06 19:45:04,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:45:04,961 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 23 treesize of output 22 [2021-12-06 19:45:05,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:45:05,034 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 23 treesize of output 22 [2021-12-06 19:45:05,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:45:05,113 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 23 treesize of output 22 [2021-12-06 19:45:05,165 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 19:45:05,183 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-12-06 19:45:05,183 INFO L328 TraceCheckSpWp]: Computing backward predicates...