./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5247496942546516118f3c28fa350944e097bdf15ee64734ca287a29ad51a034 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:50:30,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:50:30,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:50:30,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:50:30,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:50:30,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:50:30,651 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:50:30,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:50:30,656 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:50:30,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:50:30,658 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:50:30,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:50:30,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:50:30,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:50:30,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:50:30,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:50:30,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:50:30,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:50:30,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:50:30,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:50:30,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:50:30,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:50:30,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:50:30,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:50:30,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:50:30,686 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:50:30,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:50:30,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:50:30,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:50:30,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:50:30,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:50:30,691 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:50:30,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:50:30,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:50:30,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:50:30,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:50:30,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:50:30,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:50:30,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:50:30,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:50:30,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:50:30,701 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-20 22:50:30,730 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:50:30,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:50:30,731 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:50:30,731 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:50:30,732 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:50:30,732 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:50:30,733 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:50:30,733 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:50:30,733 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:50:30,733 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 22:50:30,734 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:50:30,734 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:50:30,734 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 22:50:30,734 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 22:50:30,734 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:50:30,735 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 22:50:30,735 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 22:50:30,735 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 22:50:30,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 22:50:30,736 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 22:50:30,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:50:30,737 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 22:50:30,737 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 22:50:30,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:50:30,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 22:50:30,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:50:30,738 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 22:50:30,738 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 22:50:30,738 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 22:50:30,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:50:30,740 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 22:50:30,740 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 22:50:30,741 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:50:30,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:50:30,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:50:30,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:50:30,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:50:30,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:50:30,742 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 22:50:30,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 22:50:30,743 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:50:30,743 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:50:30,743 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5247496942546516118f3c28fa350944e097bdf15ee64734ca287a29ad51a034 [2021-11-20 22:50:31,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:50:31,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:50:31,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:50:31,061 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:50:31,062 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:50:31,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i [2021-11-20 22:50:31,145 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/data/619947824/9996de0634ad4fddb8554a6b4fadfe9f/FLAG31d51bdf4 [2021-11-20 22:50:31,736 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:50:31,739 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i [2021-11-20 22:50:31,760 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/data/619947824/9996de0634ad4fddb8554a6b4fadfe9f/FLAG31d51bdf4 [2021-11-20 22:50:32,029 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/data/619947824/9996de0634ad4fddb8554a6b4fadfe9f [2021-11-20 22:50:32,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:50:32,033 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:50:32,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:50:32,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:50:32,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:50:32,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:32" (1/1) ... [2021-11-20 22:50:32,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7977176a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:32, skipping insertion in model container [2021-11-20 22:50:32,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:32" (1/1) ... [2021-11-20 22:50:32,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:50:32,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:50:32,435 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i[24556,24569] [2021-11-20 22:50:32,441 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:50:32,453 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:50:32,520 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i[24556,24569] [2021-11-20 22:50:32,534 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:50:32,566 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:50:32,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:32 WrapperNode [2021-11-20 22:50:32,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:50:32,568 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:50:32,568 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:50:32,568 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:50:32,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:32" (1/1) ... [2021-11-20 22:50:32,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:32" (1/1) ... [2021-11-20 22:50:32,622 INFO L137 Inliner]: procedures = 126, calls = 29, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 137 [2021-11-20 22:50:32,630 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:50:32,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:50:32,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:50:32,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:50:32,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:32" (1/1) ... [2021-11-20 22:50:32,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:32" (1/1) ... [2021-11-20 22:50:32,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:32" (1/1) ... [2021-11-20 22:50:32,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:32" (1/1) ... [2021-11-20 22:50:32,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:32" (1/1) ... [2021-11-20 22:50:32,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:32" (1/1) ... [2021-11-20 22:50:32,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:32" (1/1) ... [2021-11-20 22:50:32,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:50:32,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:50:32,699 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:50:32,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:50:32,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:32" (1/1) ... [2021-11-20 22:50:32,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:50:32,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:32,741 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:50:32,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:50:32,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 22:50:32,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 22:50:32,788 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-20 22:50:32,788 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-20 22:50:32,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 22:50:32,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:50:32,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 22:50:32,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 22:50:32,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 22:50:32,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 22:50:32,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:50:32,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:50:32,895 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:50:32,897 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:50:33,309 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:50:33,358 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:50:33,358 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-20 22:50:33,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:33 BoogieIcfgContainer [2021-11-20 22:50:33,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:50:33,363 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:50:33,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:50:33,370 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:50:33,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:50:32" (1/3) ... [2021-11-20 22:50:33,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f44ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:33, skipping insertion in model container [2021-11-20 22:50:33,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:32" (2/3) ... [2021-11-20 22:50:33,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f44ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:33, skipping insertion in model container [2021-11-20 22:50:33,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:33" (3/3) ... [2021-11-20 22:50:33,374 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_update_all_reverse.i [2021-11-20 22:50:33,380 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:50:33,382 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2021-11-20 22:50:33,439 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:50:33,449 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 22:50:33,449 INFO L340 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2021-11-20 22:50:33,469 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 72 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:50:33,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 22:50:33,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:33,493 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 22:50:33,494 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-20 22:50:33,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:33,500 INFO L85 PathProgramCache]: Analyzing trace with hash 212482511, now seen corresponding path program 1 times [2021-11-20 22:50:33,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:33,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739910079] [2021-11-20 22:50:33,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:33,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:33,720 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:33,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739910079] [2021-11-20 22:50:33,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739910079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:33,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:33,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 22:50:33,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013006311] [2021-11-20 22:50:33,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:33,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:50:33,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:33,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:50:33,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:50:33,767 INFO L87 Difference]: Start difference. First operand has 76 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 72 states have internal predecessors, (82), 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 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:33,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:33,935 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2021-11-20 22:50:33,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:50:33,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-20 22:50:33,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:33,945 INFO L225 Difference]: With dead ends: 73 [2021-11-20 22:50:33,953 INFO L226 Difference]: Without dead ends: 71 [2021-11-20 22:50:33,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:50:33,959 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 8 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:33,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 94 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:50:33,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-20 22:50:34,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-11-20 22:50:34,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 37 states have (on average 2.027027027027027) internal successors, (75), 67 states have internal predecessors, (75), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:50:34,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2021-11-20 22:50:34,010 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 5 [2021-11-20 22:50:34,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:34,010 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2021-11-20 22:50:34,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:34,011 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2021-11-20 22:50:34,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 22:50:34,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:34,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 22:50:34,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 22:50:34,013 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-20 22:50:34,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:34,016 INFO L85 PathProgramCache]: Analyzing trace with hash 212482512, now seen corresponding path program 1 times [2021-11-20 22:50:34,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:34,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897264261] [2021-11-20 22:50:34,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:34,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:34,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:34,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897264261] [2021-11-20 22:50:34,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897264261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:34,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:34,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 22:50:34,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054343006] [2021-11-20 22:50:34,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:34,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:50:34,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:34,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:50:34,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:50:34,125 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:34,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:34,235 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2021-11-20 22:50:34,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:50:34,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-20 22:50:34,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:34,238 INFO L225 Difference]: With dead ends: 68 [2021-11-20 22:50:34,238 INFO L226 Difference]: Without dead ends: 68 [2021-11-20 22:50:34,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:50:34,240 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 3 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:34,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 98 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:50:34,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-20 22:50:34,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-11-20 22:50:34,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 37 states have (on average 1.945945945945946) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:50:34,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-11-20 22:50:34,258 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 5 [2021-11-20 22:50:34,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:34,264 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-11-20 22:50:34,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:34,264 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-11-20 22:50:34,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 22:50:34,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:34,265 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:34,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 22:50:34,266 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-20 22:50:34,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:34,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1836044477, now seen corresponding path program 1 times [2021-11-20 22:50:34,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:34,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677412856] [2021-11-20 22:50:34,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:34,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:34,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:34,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:34,358 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:34,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677412856] [2021-11-20 22:50:34,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677412856] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:34,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:34,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:50:34,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202849109] [2021-11-20 22:50:34,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:34,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:50:34,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:34,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:50:34,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:50:34,362 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 22:50:34,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:34,418 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2021-11-20 22:50:34,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:50:34,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-20 22:50:34,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:34,424 INFO L225 Difference]: With dead ends: 79 [2021-11-20 22:50:34,424 INFO L226 Difference]: Without dead ends: 79 [2021-11-20 22:50:34,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:50:34,432 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 10 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:34,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 115 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:34,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-20 22:50:34,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-11-20 22:50:34,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 65 states have internal predecessors, (73), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:50:34,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2021-11-20 22:50:34,449 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 11 [2021-11-20 22:50:34,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:34,450 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2021-11-20 22:50:34,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 22:50:34,450 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2021-11-20 22:50:34,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 22:50:34,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:34,451 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:34,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 22:50:34,451 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-20 22:50:34,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:34,452 INFO L85 PathProgramCache]: Analyzing trace with hash -772939555, now seen corresponding path program 1 times [2021-11-20 22:50:34,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:34,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104830608] [2021-11-20 22:50:34,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:34,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 22:50:34,600 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:34,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104830608] [2021-11-20 22:50:34,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104830608] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:34,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:34,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:50:34,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815171094] [2021-11-20 22:50:34,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:34,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:50:34,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:34,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:50:34,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:50:34,602 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:50:34,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:34,781 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2021-11-20 22:50:34,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:50:34,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 19 [2021-11-20 22:50:34,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:34,786 INFO L225 Difference]: With dead ends: 88 [2021-11-20 22:50:34,786 INFO L226 Difference]: Without dead ends: 88 [2021-11-20 22:50:34,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:50:34,797 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 63 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:34,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 156 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:50:34,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-20 22:50:34,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 68. [2021-11-20 22:50:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 38 states have (on average 1.894736842105263) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:50:34,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-11-20 22:50:34,815 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 19 [2021-11-20 22:50:34,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:34,816 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-11-20 22:50:34,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:50:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-11-20 22:50:34,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 22:50:34,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:34,818 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:34,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 22:50:34,818 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-20 22:50:34,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:34,819 INFO L85 PathProgramCache]: Analyzing trace with hash -772939554, now seen corresponding path program 1 times [2021-11-20 22:50:34,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:34,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589414451] [2021-11-20 22:50:34,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:34,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:50:34,975 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:34,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589414451] [2021-11-20 22:50:34,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589414451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:34,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:34,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:50:34,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549275704] [2021-11-20 22:50:34,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:34,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:50:34,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:34,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:50:34,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:50:34,980 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:50:35,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:35,142 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2021-11-20 22:50:35,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:50:35,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 19 [2021-11-20 22:50:35,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:35,147 INFO L225 Difference]: With dead ends: 68 [2021-11-20 22:50:35,148 INFO L226 Difference]: Without dead ends: 68 [2021-11-20 22:50:35,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:50:35,150 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 63 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:35,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 165 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:50:35,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-20 22:50:35,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-11-20 22:50:35,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 38 states have (on average 1.868421052631579) internal successors, (71), 63 states have internal predecessors, (71), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:50:35,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2021-11-20 22:50:35,157 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 19 [2021-11-20 22:50:35,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:35,157 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2021-11-20 22:50:35,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:50:35,158 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2021-11-20 22:50:35,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 22:50:35,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:35,159 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:35,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 22:50:35,159 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-20 22:50:35,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:35,160 INFO L85 PathProgramCache]: Analyzing trace with hash 234429566, now seen corresponding path program 1 times [2021-11-20 22:50:35,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:35,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275324775] [2021-11-20 22:50:35,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:35,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:35,358 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:35,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275324775] [2021-11-20 22:50:35,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275324775] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:50:35,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867156915] [2021-11-20 22:50:35,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:35,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:35,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:35,364 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:50:35,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 22:50:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:35,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 22:50:35,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:35,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:50:35,689 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 22:50:35,689 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 9 [2021-11-20 22:50:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:35,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:50:35,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867156915] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:35,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:50:35,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 12 [2021-11-20 22:50:35,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125666799] [2021-11-20 22:50:35,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:35,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 22:50:35,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:35,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 22:50:35,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-20 22:50:35,778 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 11 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:50:36,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:36,041 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2021-11-20 22:50:36,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 22:50:36,041 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-11-20 22:50:36,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:36,042 INFO L225 Difference]: With dead ends: 86 [2021-11-20 22:50:36,043 INFO L226 Difference]: Without dead ends: 86 [2021-11-20 22:50:36,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-11-20 22:50:36,044 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 58 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:36,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 221 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:50:36,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-20 22:50:36,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 65. [2021-11-20 22:50:36,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 61 states have internal predecessors, (69), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:50:36,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-11-20 22:50:36,050 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 21 [2021-11-20 22:50:36,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:36,051 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-11-20 22:50:36,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:50:36,051 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-11-20 22:50:36,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 22:50:36,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:36,052 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:36,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:36,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:36,253 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-20 22:50:36,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:36,254 INFO L85 PathProgramCache]: Analyzing trace with hash 234429567, now seen corresponding path program 1 times [2021-11-20 22:50:36,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:36,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725816946] [2021-11-20 22:50:36,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:36,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:36,486 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:36,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725816946] [2021-11-20 22:50:36,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725816946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:50:36,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220680973] [2021-11-20 22:50:36,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:36,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:36,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:36,488 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:50:36,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 22:50:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:36,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 22:50:36,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:36,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:50:36,831 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 22:50:36,832 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 14 [2021-11-20 22:50:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:36,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:37,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220680973] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:50:37,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [777804652] [2021-11-20 22:50:37,055 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-20 22:50:37,055 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:50:37,059 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:50:37,066 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:50:37,067 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:50:37,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:50:37,246 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 9 [2021-11-20 22:50:37,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:50:37,294 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 1 [2021-11-20 22:50:37,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:50:37,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:37,327 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 21 treesize of output 20 [2021-11-20 22:50:37,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:37,342 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 21 treesize of output 20 [2021-11-20 22:50:37,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:50:37,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:37,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:37,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:37,383 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 36 treesize of output 23 [2021-11-20 22:50:37,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:37,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:37,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:37,415 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 36 treesize of output 23 [2021-11-20 22:50:37,428 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 13 treesize of output 9 [2021-11-20 22:50:38,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:50:38,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-11-20 22:50:38,154 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 5 treesize of output 3 [2021-11-20 22:50:38,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-11-20 22:50:38,222 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 5 treesize of output 3 [2021-11-20 22:50:38,387 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 5 treesize of output 3 [2021-11-20 22:50:38,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 22:50:38,429 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 5 treesize of output 3 [2021-11-20 22:50:38,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 22:50:38,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-11-20 22:50:38,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 26 treesize of output 21 [2021-11-20 22:50:38,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-20 22:50:38,789 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 26 treesize of output 21 [2021-11-20 22:50:39,204 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 85 for LOIs [2021-11-20 22:50:40,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-20 22:50:41,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 22:50:41,153 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Some non-self update cases but no top-level DER relation at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:340) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:278) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:264) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-20 22:50:41,157 INFO L158 Benchmark]: Toolchain (without parser) took 9124.40ms. Allocated memory was 92.3MB in the beginning and 138.4MB in the end (delta: 46.1MB). Free memory was 59.0MB in the beginning and 90.8MB in the end (delta: -31.8MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. [2021-11-20 22:50:41,158 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 92.3MB. Free memory was 46.7MB in the beginning and 46.6MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 22:50:41,158 INFO L158 Benchmark]: CACSL2BoogieTranslator took 531.11ms. Allocated memory is still 92.3MB. Free memory was 58.8MB in the beginning and 58.8MB in the end (delta: -64.2kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-20 22:50:41,159 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.93ms. Allocated memory is still 92.3MB. Free memory was 58.8MB in the beginning and 56.6MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 22:50:41,159 INFO L158 Benchmark]: Boogie Preprocessor took 64.60ms. Allocated memory is still 92.3MB. Free memory was 56.6MB in the beginning and 54.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 22:50:41,159 INFO L158 Benchmark]: RCFGBuilder took 664.45ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 54.9MB in the beginning and 82.5MB in the end (delta: -27.5MB). Peak memory consumption was 21.8MB. Max. memory is 16.1GB. [2021-11-20 22:50:41,160 INFO L158 Benchmark]: TraceAbstraction took 7794.00ms. Allocated memory was 111.1MB in the beginning and 138.4MB in the end (delta: 27.3MB). Free memory was 81.9MB in the beginning and 90.8MB in the end (delta: -8.8MB). Peak memory consumption was 18.2MB. Max. memory is 16.1GB. [2021-11-20 22:50:41,166 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 92.3MB. Free memory was 46.7MB in the beginning and 46.6MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 531.11ms. Allocated memory is still 92.3MB. Free memory was 58.8MB in the beginning and 58.8MB in the end (delta: -64.2kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 62.93ms. Allocated memory is still 92.3MB. Free memory was 58.8MB in the beginning and 56.6MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 64.60ms. Allocated memory is still 92.3MB. Free memory was 56.6MB in the beginning and 54.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 664.45ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 54.9MB in the beginning and 82.5MB in the end (delta: -27.5MB). Peak memory consumption was 21.8MB. Max. memory is 16.1GB. * TraceAbstraction took 7794.00ms. Allocated memory was 111.1MB in the beginning and 138.4MB in the end (delta: 27.3MB). Free memory was 81.9MB in the beginning and 90.8MB in the end (delta: -8.8MB). Peak memory consumption was 18.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Some non-self update cases but no top-level DER relation de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Some non-self update cases but no top-level DER relation: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-20 22:50:41,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 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_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5247496942546516118f3c28fa350944e097bdf15ee64734ca287a29ad51a034 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:50:43,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:50:43,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:50:43,573 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:50:43,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:50:43,575 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:50:43,577 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:50:43,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:50:43,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:50:43,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:50:43,585 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:50:43,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:50:43,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:50:43,588 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:50:43,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:50:43,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:50:43,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:50:43,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:50:43,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:50:43,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:50:43,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:50:43,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:50:43,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:50:43,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:50:43,623 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:50:43,623 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:50:43,624 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:50:43,625 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:50:43,625 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:50:43,627 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:50:43,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:50:43,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:50:43,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:50:43,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:50:43,643 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:50:43,643 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:50:43,644 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:50:43,644 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:50:43,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:50:43,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:50:43,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:50:43,648 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-20 22:50:43,685 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:50:43,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:50:43,686 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:50:43,686 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:50:43,687 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:50:43,687 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:50:43,688 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:50:43,688 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:50:43,691 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:50:43,691 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:50:43,692 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:50:43,693 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:50:43,694 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 22:50:43,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 22:50:43,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:50:43,697 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 22:50:43,698 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 22:50:43,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:50:43,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 22:50:43,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:50:43,698 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 22:50:43,699 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 22:50:43,699 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 22:50:43,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:50:43,700 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 22:50:43,700 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 22:50:43,700 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 22:50:43,700 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 22:50:43,701 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:50:43,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:50:43,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 22:50:43,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:50:43,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:50:43,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:50:43,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:50:43,703 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-20 22:50:43,703 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 22:50:43,703 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:50:43,703 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:50:43,704 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_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5247496942546516118f3c28fa350944e097bdf15ee64734ca287a29ad51a034 [2021-11-20 22:50:44,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:50:44,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:50:44,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:50:44,127 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:50:44,128 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:50:44,129 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i [2021-11-20 22:50:44,194 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/data/229fc4663/29f1a6efe2004355bc8f3e5859676015/FLAG777c8db2b [2021-11-20 22:50:44,826 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:50:44,832 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i [2021-11-20 22:50:44,854 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/data/229fc4663/29f1a6efe2004355bc8f3e5859676015/FLAG777c8db2b [2021-11-20 22:50:45,076 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/data/229fc4663/29f1a6efe2004355bc8f3e5859676015 [2021-11-20 22:50:45,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:50:45,083 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:50:45,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:50:45,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:50:45,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:50:45,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:45" (1/1) ... [2021-11-20 22:50:45,092 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68c0972e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:45, skipping insertion in model container [2021-11-20 22:50:45,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:45" (1/1) ... [2021-11-20 22:50:45,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:50:45,156 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:50:45,596 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i[24556,24569] [2021-11-20 22:50:45,601 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:50:45,615 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:50:45,690 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i[24556,24569] [2021-11-20 22:50:45,692 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:50:45,725 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:50:45,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:45 WrapperNode [2021-11-20 22:50:45,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:50:45,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:50:45,727 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:50:45,727 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:50:45,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:45" (1/1) ... [2021-11-20 22:50:45,751 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:45" (1/1) ... [2021-11-20 22:50:45,777 INFO L137 Inliner]: procedures = 129, calls = 29, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 137 [2021-11-20 22:50:45,777 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:50:45,778 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:50:45,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:50:45,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:50:45,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:45" (1/1) ... [2021-11-20 22:50:45,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:45" (1/1) ... [2021-11-20 22:50:45,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:45" (1/1) ... [2021-11-20 22:50:45,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:45" (1/1) ... [2021-11-20 22:50:45,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:45" (1/1) ... [2021-11-20 22:50:45,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:45" (1/1) ... [2021-11-20 22:50:45,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:45" (1/1) ... [2021-11-20 22:50:45,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:50:45,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:50:45,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:50:45,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:50:45,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:45" (1/1) ... [2021-11-20 22:50:45,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:50:45,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:45,876 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:50:45,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:50:45,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 22:50:45,926 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-20 22:50:45,926 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-20 22:50:45,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 22:50:45,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:50:45,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 22:50:45,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 22:50:45,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 22:50:45,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 22:50:45,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 22:50:45,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:50:45,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:50:46,112 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:50:46,113 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:50:46,592 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:50:46,599 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:50:46,600 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-20 22:50:46,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:46 BoogieIcfgContainer [2021-11-20 22:50:46,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:50:46,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:50:46,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:50:46,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:50:46,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:50:45" (1/3) ... [2021-11-20 22:50:46,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7967f9be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:46, skipping insertion in model container [2021-11-20 22:50:46,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:45" (2/3) ... [2021-11-20 22:50:46,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7967f9be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:46, skipping insertion in model container [2021-11-20 22:50:46,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:46" (3/3) ... [2021-11-20 22:50:46,629 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_update_all_reverse.i [2021-11-20 22:50:46,634 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:50:46,635 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2021-11-20 22:50:46,692 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:50:46,700 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 22:50:46,700 INFO L340 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2021-11-20 22:50:46,715 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 89 states have internal predecessors, (105), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:50:46,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 22:50:46,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:46,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 22:50:46,723 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-20 22:50:46,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:46,729 INFO L85 PathProgramCache]: Analyzing trace with hash 894964530, now seen corresponding path program 1 times [2021-11-20 22:50:46,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:50:46,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117253063] [2021-11-20 22:50:46,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:46,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:50:46,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:50:46,746 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:50:46,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 22:50:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:46,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 22:50:46,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:46,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:50:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:46,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:47,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:47,007 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:50:47,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117253063] [2021-11-20 22:50:47,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117253063] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:47,009 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:47,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 22:50:47,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806705554] [2021-11-20 22:50:47,014 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:47,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:50:47,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:50:47,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:50:47,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:50:47,059 INFO L87 Difference]: Start difference. First operand has 93 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 89 states have internal predecessors, (105), 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 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:47,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:47,278 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2021-11-20 22:50:47,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:50:47,281 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 22:50:47,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:47,291 INFO L225 Difference]: With dead ends: 90 [2021-11-20 22:50:47,291 INFO L226 Difference]: Without dead ends: 87 [2021-11-20 22:50:47,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:50:47,298 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 10 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:47,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 147 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:50:47,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-20 22:50:47,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-20 22:50:47,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 83 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:50:47,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2021-11-20 22:50:47,352 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 6 [2021-11-20 22:50:47,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:47,352 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2021-11-20 22:50:47,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:47,354 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2021-11-20 22:50:47,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 22:50:47,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:47,354 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 22:50:47,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:47,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:50:47,564 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-20 22:50:47,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:47,566 INFO L85 PathProgramCache]: Analyzing trace with hash 894964531, now seen corresponding path program 1 times [2021-11-20 22:50:47,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:50:47,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687524366] [2021-11-20 22:50:47,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:47,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:50:47,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:50:47,570 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:50:47,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 22:50:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:47,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:50:47,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:47,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:50:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:47,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:47,812 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:50:47,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687524366] [2021-11-20 22:50:47,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687524366] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:47,814 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:47,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-20 22:50:47,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102783991] [2021-11-20 22:50:47,815 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:47,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:50:47,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:50:47,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:50:47,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:47,819 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:48,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:48,133 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2021-11-20 22:50:48,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:50:48,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 22:50:48,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:48,135 INFO L225 Difference]: With dead ends: 84 [2021-11-20 22:50:48,135 INFO L226 Difference]: Without dead ends: 84 [2021-11-20 22:50:48,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:48,137 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 5 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:48,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 211 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 22:50:48,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-20 22:50:48,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-11-20 22:50:48,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 80 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:50:48,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2021-11-20 22:50:48,147 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 6 [2021-11-20 22:50:48,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:48,147 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2021-11-20 22:50:48,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:48,148 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2021-11-20 22:50:48,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 22:50:48,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:48,149 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:48,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:48,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:50:48,359 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-20 22:50:48,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:48,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1046244471, now seen corresponding path program 1 times [2021-11-20 22:50:48,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:50:48,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154901137] [2021-11-20 22:50:48,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:48,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:50:48,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:50:48,365 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:50:48,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 22:50:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:48,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 22:50:48,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:48,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:48,510 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:50:48,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154901137] [2021-11-20 22:50:48,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154901137] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:48,511 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:48,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 22:50:48,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772691855] [2021-11-20 22:50:48,511 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:48,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:50:48,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:50:48,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:50:48,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:48,513 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:50:48,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:48,531 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2021-11-20 22:50:48,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:50:48,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 14 [2021-11-20 22:50:48,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:48,533 INFO L225 Difference]: With dead ends: 95 [2021-11-20 22:50:48,533 INFO L226 Difference]: Without dead ends: 95 [2021-11-20 22:50:48,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:48,535 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 19 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:48,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 252 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:48,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-20 22:50:48,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2021-11-20 22:50:48,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 81 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:50:48,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 93 transitions. [2021-11-20 22:50:48,545 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 93 transitions. Word has length 14 [2021-11-20 22:50:48,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:48,546 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 93 transitions. [2021-11-20 22:50:48,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:50:48,546 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 93 transitions. [2021-11-20 22:50:48,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 22:50:48,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:48,547 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:48,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:48,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:50:48,758 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-20 22:50:48,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:48,758 INFO L85 PathProgramCache]: Analyzing trace with hash 543084160, now seen corresponding path program 1 times [2021-11-20 22:50:48,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:50:48,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452227310] [2021-11-20 22:50:48,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:48,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:50:48,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:50:48,760 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:50:48,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 22:50:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:48,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 22:50:48,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:48,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:50:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:50:48,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:50:49,117 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:50:49,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452227310] [2021-11-20 22:50:49,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1452227310] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:49,118 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:49,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 22:50:49,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533178570] [2021-11-20 22:50:49,118 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:49,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:50:49,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:50:49,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:50:49,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:50:49,120 INFO L87 Difference]: Start difference. First operand 85 states and 93 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:50:49,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:49,498 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2021-11-20 22:50:49,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:50:49,499 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (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 24 [2021-11-20 22:50:49,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:49,501 INFO L225 Difference]: With dead ends: 105 [2021-11-20 22:50:49,501 INFO L226 Difference]: Without dead ends: 105 [2021-11-20 22:50:49,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:50:49,503 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 76 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:49,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 243 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 22:50:49,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-20 22:50:49,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 84. [2021-11-20 22:50:49,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 54 states have (on average 1.6296296296296295) internal successors, (88), 80 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:50:49,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2021-11-20 22:50:49,526 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 24 [2021-11-20 22:50:49,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:49,527 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2021-11-20 22:50:49,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:50:49,530 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2021-11-20 22:50:49,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 22:50:49,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:49,532 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:49,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:49,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:50:49,732 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-20 22:50:49,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:49,733 INFO L85 PathProgramCache]: Analyzing trace with hash 543084161, now seen corresponding path program 1 times [2021-11-20 22:50:49,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:50:49,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722761719] [2021-11-20 22:50:49,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:49,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:50:49,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:50:49,738 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:50:49,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 22:50:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:49,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 22:50:49,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:49,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:50:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:50:50,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:50:50,522 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:50:50,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722761719] [2021-11-20 22:50:50,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722761719] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:50,523 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:50,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-20 22:50:50,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120407005] [2021-11-20 22:50:50,523 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:50,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 22:50:50,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:50:50,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 22:50:50,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 22:50:50,526 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 22:50:51,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:51,170 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2021-11-20 22:50:51,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:50:51,172 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-11-20 22:50:51,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:51,173 INFO L225 Difference]: With dead ends: 84 [2021-11-20 22:50:51,173 INFO L226 Difference]: Without dead ends: 84 [2021-11-20 22:50:51,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 22:50:51,175 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 154 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:51,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 312 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 22:50:51,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-20 22:50:51,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-11-20 22:50:51,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 54 states have (on average 1.6111111111111112) internal successors, (87), 79 states have internal predecessors, (87), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:50:51,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-11-20 22:50:51,184 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 24 [2021-11-20 22:50:51,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:51,185 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-11-20 22:50:51,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 22:50:51,185 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-11-20 22:50:51,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 22:50:51,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:51,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:51,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:51,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:50:51,398 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-20 22:50:51,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:51,398 INFO L85 PathProgramCache]: Analyzing trace with hash -2082132639, now seen corresponding path program 1 times [2021-11-20 22:50:51,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:50:51,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086503509] [2021-11-20 22:50:51,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:51,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:50:51,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:50:51,400 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:50:51,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 22:50:51,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:51,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 22:50:51,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:51,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:50:51,763 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 22:50:51,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-11-20 22:50:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:51,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:17,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:51:17,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086503509] [2021-11-20 22:51:17,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086503509] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:51:17,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2025227977] [2021-11-20 22:51:17,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:17,342 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 22:51:17,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 22:51:17,348 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 22:51:17,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-20 22:51:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:17,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 22:51:17,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:17,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:51:21,672 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-20 22:51:21,672 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 22 treesize of output 27 [2021-11-20 22:51:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:21,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:30,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2025227977] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 22:51:30,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:51:30,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8, 6] total 18 [2021-11-20 22:51:30,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476865471] [2021-11-20 22:51:30,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:30,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 22:51:30,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:51:30,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 22:51:30,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=270, Unknown=13, NotChecked=0, Total=342 [2021-11-20 22:51:30,491 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:51:32,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:32,957 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2021-11-20 22:51:32,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 22:51:32,957 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 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 26 [2021-11-20 22:51:32,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:32,959 INFO L225 Difference]: With dead ends: 110 [2021-11-20 22:51:32,959 INFO L226 Difference]: Without dead ends: 110 [2021-11-20 22:51:32,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=69, Invalid=297, Unknown=14, NotChecked=0, Total=380 [2021-11-20 22:51:32,960 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 65 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:32,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 313 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 214 Invalid, 0 Unknown, 24 Unchecked, 0.4s Time] [2021-11-20 22:51:32,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-20 22:51:32,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 88. [2021-11-20 22:51:32,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.603448275862069) internal successors, (93), 83 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 22:51:32,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2021-11-20 22:51:32,969 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 26 [2021-11-20 22:51:32,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:32,969 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2021-11-20 22:51:32,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:51:32,970 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2021-11-20 22:51:32,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 22:51:32,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:32,971 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:32,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:33,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-20 22:51:33,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 22:51:33,379 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-20 22:51:33,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:33,380 INFO L85 PathProgramCache]: Analyzing trace with hash -2082132638, now seen corresponding path program 1 times [2021-11-20 22:51:33,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:51:33,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919634406] [2021-11-20 22:51:33,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:33,381 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:51:33,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:51:33,384 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:51:33,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 22:51:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:33,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 22:51:33,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:33,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:51:33,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:51:33,856 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 22:51:33,856 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 32 treesize of output 34 [2021-11-20 22:51:33,874 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:51:33,875 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 31 treesize of output 31 [2021-11-20 22:51:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:33,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:45,383 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_52| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_6| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_52|)))) (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (and (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse0) (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_52| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_6|)))) (exists ((|v_node_create_~temp~0#1.base_51| (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule .cse1 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_51| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_6|))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse1)))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_51|)))))))) is different from false [2021-11-20 22:51:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:52,639 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:51:52,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919634406] [2021-11-20 22:51:52,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919634406] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:51:52,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [406177788] [2021-11-20 22:51:52,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:52,640 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 22:51:52,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 22:51:52,641 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 22:51:52,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-20 22:51:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:52,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 22:51:52,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:52,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:51:52,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:51:53,191 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 22:51:53,192 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 32 treesize of output 34 [2021-11-20 22:51:53,208 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:51:53,208 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 31 treesize of output 31 [2021-11-20 22:51:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:53,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:04,691 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_60| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_6| (_ BitVec 32))) (or (exists ((|v_node_create_~temp~0#1.base_51| (_ BitVec 32))) (and (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule .cse0 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_51| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_6|))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse0)))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_51|)))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_60|)))) (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (and (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_60| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_6|)) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse1))))) is different from false [2021-11-20 22:52:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:05,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [406177788] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:52:05,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68579892] [2021-11-20 22:52:05,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:05,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:52:05,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:52:05,227 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:52:05,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 22:52:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:05,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 22:52:05,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:05,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:52:05,708 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 22:52:05,708 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 30 treesize of output 32 [2021-11-20 22:52:05,719 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:52:05,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-11-20 22:52:05,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:05,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:25,103 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_68| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_6| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_68|)))))) (exists ((|v_node_create_~temp~0#1.base_51| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_51|))))) (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_51| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_10|))))))) (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (and (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse1) (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_68| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_10|)))))) is different from false [2021-11-20 22:52:25,534 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 22:52:25,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-20 22:52:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:27,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68579892] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:52:27,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 22:52:27,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 20 [2021-11-20 22:52:27,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188526617] [2021-11-20 22:52:27,838 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 22:52:27,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 22:52:27,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:52:27,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 22:52:27,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=251, Unknown=14, NotChecked=102, Total=420 [2021-11-20 22:52:27,840 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 21 states, 20 states have (on average 2.8) internal successors, (56), 15 states have internal predecessors, (56), 3 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 22:52:30,010 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_60| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_6| (_ BitVec 32))) (or (exists ((|v_node_create_~temp~0#1.base_51| (_ BitVec 32))) (and (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule .cse0 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_51| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_6|))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse0)))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_51|)))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_60|)))) (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (and (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_60| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_6|)) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse1))))) (= |c_old(#valid)| |c_#valid|) (= |c_#length| |c_old(#length)|) (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_68| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_6| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_68|)))))) (exists ((|v_node_create_~temp~0#1.base_51| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_51|))))) (let ((.cse2 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse2)) (not (bvule .cse2 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_51| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_10|))))))) (let ((.cse3 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_6|))) (and (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_6|) .cse3) (bvule .cse3 (select (store |c_#length| |v_node_create_~temp~0#1.base_68| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_10|)))))) (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_52| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_6| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_52|)))) (let ((.cse4 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (and (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse4) (bvule .cse4 (select (store |c_#length| |v_node_create_~temp~0#1.base_52| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_6|)))) (exists ((|v_node_create_~temp~0#1.base_51| (_ BitVec 32))) (and (let ((.cse5 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule .cse5 (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_51| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_6|))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2|) .cse5)))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_51|))))))))) is different from false [2021-11-20 22:52:30,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:30,523 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2021-11-20 22:52:30,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 22:52:30,524 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.8) internal successors, (56), 15 states have internal predecessors, (56), 3 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 26 [2021-11-20 22:52:30,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:30,525 INFO L225 Difference]: With dead ends: 89 [2021-11-20 22:52:30,525 INFO L226 Difference]: Without dead ends: 89 [2021-11-20 22:52:30,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 125 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 45.1s TimeCoverageRelationStatistics Valid=71, Invalid=310, Unknown=15, NotChecked=156, Total=552 [2021-11-20 22:52:30,527 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 62 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:30,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 574 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 160 Invalid, 0 Unknown, 480 Unchecked, 0.5s Time] [2021-11-20 22:52:30,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-20 22:52:30,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-11-20 22:52:30,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.5862068965517242) internal successors, (92), 83 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 22:52:30,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2021-11-20 22:52:30,535 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 26 [2021-11-20 22:52:30,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:30,535 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2021-11-20 22:52:30,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.8) internal successors, (56), 15 states have internal predecessors, (56), 3 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 22:52:30,536 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2021-11-20 22:52:30,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 22:52:30,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:30,537 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:30,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 22:52:30,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-20 22:52:30,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 22:52:31,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:52:31,144 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-20 22:52:31,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:31,144 INFO L85 PathProgramCache]: Analyzing trace with hash 525447991, now seen corresponding path program 1 times [2021-11-20 22:52:31,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:52:31,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910054698] [2021-11-20 22:52:31,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:31,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:52:31,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:52:31,145 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:52:31,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 22:52:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:31,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 22:52:31,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:52:31,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:31,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:52:31,429 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:52:31,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910054698] [2021-11-20 22:52:31,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910054698] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:52:31,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2027113596] [2021-11-20 22:52:31,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:31,430 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 22:52:31,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 22:52:31,433 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 22:52:31,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-20 22:52:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:31,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 22:52:31,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:52:31,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:52:31,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2027113596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:52:31,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705092155] [2021-11-20 22:52:31,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:31,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:52:31,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:52:31,704 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:52:31,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 22:52:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:31,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 22:52:31,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:52:31,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:52:31,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705092155] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:52:31,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 22:52:31,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 6 [2021-11-20 22:52:31,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713740138] [2021-11-20 22:52:31,958 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 22:52:31,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:52:31,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:52:31,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:52:31,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:52:31,960 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:52:32,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:32,185 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2021-11-20 22:52:32,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:52:32,186 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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 28 [2021-11-20 22:52:32,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:32,186 INFO L225 Difference]: With dead ends: 89 [2021-11-20 22:52:32,187 INFO L226 Difference]: Without dead ends: 89 [2021-11-20 22:52:32,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:52:32,188 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 4 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:32,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 394 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:52:32,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-20 22:52:32,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-11-20 22:52:32,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.5689655172413792) internal successors, (91), 83 states have internal predecessors, (91), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 22:52:32,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2021-11-20 22:52:32,194 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 28 [2021-11-20 22:52:32,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:32,194 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2021-11-20 22:52:32,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:52:32,194 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2021-11-20 22:52:32,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 22:52:32,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:32,203 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:32,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-20 22:52:32,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 22:52:32,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-20 22:52:32,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 22:52:32,814 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-20 22:52:32,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:32,815 INFO L85 PathProgramCache]: Analyzing trace with hash -895762126, now seen corresponding path program 1 times [2021-11-20 22:52:32,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:52:32,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333600758] [2021-11-20 22:52:32,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:32,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:52:32,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:52:32,816 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:52:32,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 22:52:32,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:32,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:52:32,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 22:52:32,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:32,984 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 22:52:32,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 22:52:33,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 22:52:33,033 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:52:33,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1333600758] [2021-11-20 22:52:33,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1333600758] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:52:33,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1533717403] [2021-11-20 22:52:33,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:33,033 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 22:52:33,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 22:52:33,034 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 22:52:33,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-20 22:52:33,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:33,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 22:52:33,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 22:52:33,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:33,289 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 22:52:33,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 22:52:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 22:52:33,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1533717403] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:52:33,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836931624] [2021-11-20 22:52:33,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:33,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:52:33,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:52:33,361 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:52:33,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 22:52:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:33,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:52:33,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 22:52:33,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:33,502 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 22:52:33,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 22:52:33,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 22:52:33,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836931624] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:52:33,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 22:52:33,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2021-11-20 22:52:33,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436684194] [2021-11-20 22:52:33,552 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 22:52:33,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:52:33,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:52:33,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:52:33,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:52:33,553 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:52:33,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:33,816 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2021-11-20 22:52:33,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:52:33,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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 29 [2021-11-20 22:52:33,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:33,818 INFO L225 Difference]: With dead ends: 113 [2021-11-20 22:52:33,818 INFO L226 Difference]: Without dead ends: 113 [2021-11-20 22:52:33,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 163 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:33,819 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 65 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:33,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 154 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:52:33,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-20 22:52:33,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 91. [2021-11-20 22:52:33,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 61 states have (on average 1.5737704918032787) internal successors, (96), 86 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 22:52:33,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2021-11-20 22:52:33,839 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 29 [2021-11-20 22:52:33,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:33,839 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2021-11-20 22:52:33,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:52:33,839 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2021-11-20 22:52:33,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 22:52:33,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:33,841 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:33,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 22:52:34,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-20 22:52:34,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 22:52:34,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:52:34,441 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-20 22:52:34,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:34,442 INFO L85 PathProgramCache]: Analyzing trace with hash -895762125, now seen corresponding path program 1 times [2021-11-20 22:52:34,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:52:34,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138388187] [2021-11-20 22:52:34,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:34,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:52:34,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:52:34,443 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:52:34,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 22:52:34,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:34,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 22:52:34,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:34,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:52:34,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:34,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:52:34,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-11-20 22:52:35,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:52:35,382 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:52:35,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138388187] [2021-11-20 22:52:35,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138388187] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:52:35,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2096059224] [2021-11-20 22:52:35,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:35,382 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 22:52:35,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 22:52:35,383 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 22:52:35,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-20 22:52:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:35,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 22:52:35,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:52:35,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:35,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:52:35,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-11-20 22:52:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:52:36,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2096059224] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:52:36,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205115707] [2021-11-20 22:52:36,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:36,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:52:36,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:52:36,109 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:52:36,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 22:52:36,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:36,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 22:52:36,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:52:36,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:36,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:52:36,390 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 22 treesize of output 26 [2021-11-20 22:52:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:52:36,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205115707] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:52:36,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 22:52:36,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2021-11-20 22:52:36,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484844402] [2021-11-20 22:52:36,717 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 22:52:36,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 22:52:36,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:52:36,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 22:52:36,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-20 22:52:36,718 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 22:52:37,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:37,773 INFO L93 Difference]: Finished difference Result 150 states and 166 transitions. [2021-11-20 22:52:37,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 22:52:37,774 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2021-11-20 22:52:37,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:37,775 INFO L225 Difference]: With dead ends: 150 [2021-11-20 22:52:37,776 INFO L226 Difference]: Without dead ends: 150 [2021-11-20 22:52:37,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-20 22:52:37,777 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 197 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:37,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 530 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 22:52:37,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-20 22:52:37,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 91. [2021-11-20 22:52:37,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 86 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 22:52:37,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2021-11-20 22:52:37,782 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 29 [2021-11-20 22:52:37,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:37,786 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2021-11-20 22:52:37,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 22:52:37,787 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2021-11-20 22:52:37,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 22:52:37,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:37,793 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:37,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 22:52:38,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-20 22:52:38,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-20 22:52:38,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 22:52:38,411 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-20 22:52:38,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:38,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1998822125, now seen corresponding path program 1 times [2021-11-20 22:52:38,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:52:38,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086242617] [2021-11-20 22:52:38,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:38,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:52:38,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:52:38,414 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:52:38,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-20 22:52:38,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:38,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 22:52:38,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:38,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:52:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:52:38,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:38,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:52:38,754 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:52:38,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086242617] [2021-11-20 22:52:38,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086242617] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:38,756 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:38,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-20 22:52:38,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060293875] [2021-11-20 22:52:38,756 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:38,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 22:52:38,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:52:38,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 22:52:38,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:52:38,757 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:52:39,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:39,218 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2021-11-20 22:52:39,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:52:39,218 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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 30 [2021-11-20 22:52:39,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:39,219 INFO L225 Difference]: With dead ends: 111 [2021-11-20 22:52:39,219 INFO L226 Difference]: Without dead ends: 111 [2021-11-20 22:52:39,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 22:52:39,220 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 134 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:39,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 252 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 22:52:39,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-20 22:52:39,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 90. [2021-11-20 22:52:39,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 61 states have (on average 1.540983606557377) internal successors, (94), 85 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 22:52:39,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2021-11-20 22:52:39,225 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 30 [2021-11-20 22:52:39,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:39,226 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2021-11-20 22:52:39,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:52:39,226 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2021-11-20 22:52:39,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 22:52:39,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:39,227 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:39,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-20 22:52:39,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:52:39,447 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-20 22:52:39,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:39,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1998822124, now seen corresponding path program 1 times [2021-11-20 22:52:39,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:52:39,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085138439] [2021-11-20 22:52:39,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:39,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:52:39,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:52:39,449 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:52:39,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-20 22:52:39,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:39,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 22:52:39,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:39,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:52:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:52:39,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:40,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:52:40,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:52:40,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085138439] [2021-11-20 22:52:40,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085138439] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:40,381 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:40,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-20 22:52:40,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517095316] [2021-11-20 22:52:40,381 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:40,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 22:52:40,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:52:40,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 22:52:40,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-20 22:52:40,382 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 22:52:41,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:41,315 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2021-11-20 22:52:41,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 22:52:41,317 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2021-11-20 22:52:41,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:41,318 INFO L225 Difference]: With dead ends: 90 [2021-11-20 22:52:41,318 INFO L226 Difference]: Without dead ends: 90 [2021-11-20 22:52:41,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-20 22:52:41,319 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 136 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:41,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 315 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 22:52:41,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-20 22:52:41,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-11-20 22:52:41,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 61 states have (on average 1.5245901639344261) internal successors, (93), 84 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 22:52:41,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2021-11-20 22:52:41,324 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 30 [2021-11-20 22:52:41,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:41,324 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2021-11-20 22:52:41,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 22:52:41,325 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2021-11-20 22:52:41,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 22:52:41,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:41,326 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:41,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-20 22:52:41,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:52:41,537 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-20 22:52:41,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:41,537 INFO L85 PathProgramCache]: Analyzing trace with hash 452746567, now seen corresponding path program 1 times [2021-11-20 22:52:41,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:52:41,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137875812] [2021-11-20 22:52:41,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:41,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:52:41,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:52:41,538 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:52:41,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-20 22:52:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:41,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 22:52:41,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 22:52:41,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:41,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 22:52:41,871 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:52:41,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137875812] [2021-11-20 22:52:41,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137875812] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:41,872 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:41,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-20 22:52:41,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719959743] [2021-11-20 22:52:41,872 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:41,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 22:52:41,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:52:41,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 22:52:41,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:52:41,874 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 22:52:41,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:41,976 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2021-11-20 22:52:41,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:52:41,977 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-11-20 22:52:41,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:41,977 INFO L225 Difference]: With dead ends: 120 [2021-11-20 22:52:41,977 INFO L226 Difference]: Without dead ends: 120 [2021-11-20 22:52:41,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-20 22:52:41,978 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 164 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:41,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 257 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:52:41,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-20 22:52:41,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 92. [2021-11-20 22:52:41,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 64 states have (on average 1.5) internal successors, (96), 87 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 22:52:41,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2021-11-20 22:52:41,983 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 35 [2021-11-20 22:52:41,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:41,983 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2021-11-20 22:52:41,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 22:52:41,984 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2021-11-20 22:52:41,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 22:52:41,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:41,985 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:41,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-20 22:52:42,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:52:42,195 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-20 22:52:42,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:42,195 INFO L85 PathProgramCache]: Analyzing trace with hash 452746622, now seen corresponding path program 1 times [2021-11-20 22:52:42,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:52:42,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420880911] [2021-11-20 22:52:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:42,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:52:42,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:52:42,197 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:52:42,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-20 22:52:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:42,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 22:52:42,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:42,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:52:42,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:52:42,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:52:42,758 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:52:42,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420880911] [2021-11-20 22:52:42,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420880911] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:42,758 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:42,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 9 [2021-11-20 22:52:42,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623665597] [2021-11-20 22:52:42,758 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:42,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 22:52:42,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:52:42,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 22:52:42,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-20 22:52:42,759 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:52:43,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:43,577 INFO L93 Difference]: Finished difference Result 118 states and 129 transitions. [2021-11-20 22:52:43,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 22:52:43,577 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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 35 [2021-11-20 22:52:43,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:43,579 INFO L225 Difference]: With dead ends: 118 [2021-11-20 22:52:43,579 INFO L226 Difference]: Without dead ends: 118 [2021-11-20 22:52:43,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-20 22:52:43,580 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 306 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:43,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 310 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 22:52:43,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-20 22:52:43,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 95. [2021-11-20 22:52:43,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 67 states have (on average 1.5223880597014925) internal successors, (102), 90 states have internal predecessors, (102), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 22:52:43,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2021-11-20 22:52:43,585 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 35 [2021-11-20 22:52:43,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:43,585 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2021-11-20 22:52:43,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:52:43,585 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2021-11-20 22:52:43,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 22:52:43,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:43,586 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:43,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-20 22:52:43,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:52:43,791 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-20 22:52:43,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:43,791 INFO L85 PathProgramCache]: Analyzing trace with hash 452746623, now seen corresponding path program 1 times [2021-11-20 22:52:43,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:52:43,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [433125058] [2021-11-20 22:52:43,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:43,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:52:43,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:52:43,793 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:52:43,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-20 22:52:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:43,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 22:52:43,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:43,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:52:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:52:44,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:52:45,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:52:45,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [433125058] [2021-11-20 22:52:45,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [433125058] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:45,314 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:45,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 17 [2021-11-20 22:52:45,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727097255] [2021-11-20 22:52:45,314 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:45,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 22:52:45,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:52:45,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 22:52:45,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-11-20 22:52:45,315 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand has 18 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 22:52:47,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:47,346 INFO L93 Difference]: Finished difference Result 142 states and 157 transitions. [2021-11-20 22:52:47,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 22:52:47,348 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2021-11-20 22:52:47,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:47,349 INFO L225 Difference]: With dead ends: 142 [2021-11-20 22:52:47,349 INFO L226 Difference]: Without dead ends: 142 [2021-11-20 22:52:47,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-11-20 22:52:47,350 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 378 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:47,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 534 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 22:52:47,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-20 22:52:47,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 95. [2021-11-20 22:52:47,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 67 states have (on average 1.492537313432836) internal successors, (100), 90 states have internal predecessors, (100), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 22:52:47,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2021-11-20 22:52:47,355 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 35 [2021-11-20 22:52:47,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:47,355 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2021-11-20 22:52:47,355 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 22:52:47,355 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2021-11-20 22:52:47,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 22:52:47,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:47,356 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:47,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-20 22:52:47,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:52:47,567 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-20 22:52:47,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:47,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1577337163, now seen corresponding path program 1 times [2021-11-20 22:52:47,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:52:47,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516123624] [2021-11-20 22:52:47,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:47,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:52:47,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:52:47,568 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:52:47,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-20 22:52:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:47,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-20 22:52:47,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:52:47,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:52:47,934 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:52:47,934 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 [2021-11-20 22:52:48,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:52:48,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 22:52:50,945 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-20 22:52:50,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 37 [2021-11-20 22:52:51,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:52:51,051 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-11-20 22:52:51,051 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 48 [2021-11-20 22:52:51,544 INFO L354 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-11-20 22:52:51,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 36 [2021-11-20 22:52:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:51,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:52:54,094 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))))))))))))))))) (_ bv1 1)))) is different from false [2021-11-20 22:52:56,109 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|)))))))))))))))))) (_ bv1 1)))) is different from false [2021-11-20 22:52:56,139 INFO L354 Elim1Store]: treesize reduction 5, result has 87.5 percent of original size [2021-11-20 22:52:56,139 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 68 treesize of output 67 [2021-11-20 22:53:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-20 22:53:34,714 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:53:34,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516123624] [2021-11-20 22:53:34,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516123624] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:53:34,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [688783774] [2021-11-20 22:53:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:34,726 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 22:53:34,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 22:53:34,726 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 22:53:34,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-20 22:53:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:34,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-20 22:53:34,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:34,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:53:35,252 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 22:53:35,252 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 23 treesize of output 30 [2021-11-20 22:53:35,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:53:35,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 22:53:36,060 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-20 22:53:36,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 50 [2021-11-20 22:53:36,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:36,238 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-11-20 22:53:36,239 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 63 [2021-11-20 22:53:37,159 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-20 22:53:37,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 44 [2021-11-20 22:53:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:53:37,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:54:11,982 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))))))))))))))))) (_ bv1 1)))) is different from false [2021-11-20 22:54:14,002 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (bvadd (_ bv4 32) |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))))))))))))))))) (_ bv1 1)))) is different from false [2021-11-20 22:54:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:54:50,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [688783774] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:54:50,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663272709] [2021-11-20 22:54:50,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:50,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:54:50,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:54:50,189 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:54:50,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 22:54:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:50,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 22:54:50,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:54:50,350 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:54:50,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-20 22:54:50,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:54:52,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 22:54:53,169 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-20 22:54:53,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 37 [2021-11-20 22:54:53,384 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-20 22:54:53,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 48 [2021-11-20 22:54:54,306 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-20 22:54:54,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 26 [2021-11-20 22:54:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:54:54,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:54:54,734 INFO L354 Elim1Store]: treesize reduction 5, result has 87.5 percent of original size [2021-11-20 22:54:54,735 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 68 treesize of output 67 [2021-11-20 22:54:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-20 22:54:57,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663272709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:54:57,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 22:54:57,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 19, 19, 19, 16] total 66 [2021-11-20 22:54:57,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390134249] [2021-11-20 22:54:57,081 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 22:54:57,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-20 22:54:57,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:54:57,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-20 22:54:57,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=3601, Unknown=43, NotChecked=500, Total=4422 [2021-11-20 22:54:57,085 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand has 67 states, 66 states have (on average 1.878787878787879) internal successors, (124), 57 states have internal predecessors, (124), 4 states have call successors, (4), 4 states have call predecessors, (4), 7 states have return successors, (8), 8 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 22:55:23,708 WARN L227 SmtUtils]: Spent 20.03s on a formula simplification. DAG size of input: 84 DAG size of output: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 22:55:25,712 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (bvadd (_ bv4 32) |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))))))))))))))))) (_ bv1 1)))) (forall ((|v_node_create_~temp~0#1.base_176| (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_node_create_~temp~0#1.base_176| (_ bv1 1)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))))))))))))))))))))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_176|))))))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| (_ BitVec 32))) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (bvadd (_ bv4 32) |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse1 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse1 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|)))) is different from false [2021-11-20 22:55:27,732 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))))))))))))))))) (_ bv1 1)))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|)))))))))))))))))) (_ bv1 1))))) is different from false [2021-11-20 22:55:29,737 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))))))))))))))))) (_ bv1 1)))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)))))))))))))))) (_ bv1 1))))) is different from false [2021-11-20 22:55:30,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:30,101 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2021-11-20 22:55:30,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 22:55:30,103 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.878787878787879) internal successors, (124), 57 states have internal predecessors, (124), 4 states have call successors, (4), 4 states have call predecessors, (4), 7 states have return successors, (8), 8 states have call predecessors, (8), 4 states have call successors, (8) Word has length 38 [2021-11-20 22:55:30,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:30,104 INFO L225 Difference]: With dead ends: 139 [2021-11-20 22:55:30,104 INFO L226 Difference]: Without dead ends: 139 [2021-11-20 22:55:30,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 138 SyntacticMatches, 23 SemanticMatches, 76 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 1932 ImplicationChecksByTransitivity, 154.8s TimeCoverageRelationStatistics Valid=377, Invalid=4573, Unknown=48, NotChecked=1008, Total=6006 [2021-11-20 22:55:30,107 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 43 mSDsluCounter, 1631 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1697 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 829 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:30,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 1697 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 541 Invalid, 0 Unknown, 829 Unchecked, 1.3s Time] [2021-11-20 22:55:30,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-20 22:55:30,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 128. [2021-11-20 22:55:30,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 97 states have (on average 1.422680412371134) internal successors, (138), 120 states have internal predecessors, (138), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 22:55:30,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 146 transitions. [2021-11-20 22:55:30,113 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 146 transitions. Word has length 38 [2021-11-20 22:55:30,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:30,113 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 146 transitions. [2021-11-20 22:55:30,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.878787878787879) internal successors, (124), 57 states have internal predecessors, (124), 4 states have call successors, (4), 4 states have call predecessors, (4), 7 states have return successors, (8), 8 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 22:55:30,114 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 146 transitions. [2021-11-20 22:55:30,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 22:55:30,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:30,115 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:30,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-20 22:55:30,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-20 22:55:30,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-20 22:55:30,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 22:55:30,716 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-20 22:55:30,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:30,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1577337164, now seen corresponding path program 1 times [2021-11-20 22:55:30,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:55:30,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31538009] [2021-11-20 22:55:30,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:30,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:55:30,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:55:30,718 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:55:30,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-20 22:55:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:30,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-20 22:55:30,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:55:30,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:55:30,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:55:31,308 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 22:55:31,308 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 14 [2021-11-20 22:55:31,335 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:55:31,335 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 20 treesize of output 20 [2021-11-20 22:55:31,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:55:31,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:55:31,622 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 19 treesize of output 18 [2021-11-20 22:55:31,656 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 19 treesize of output 18 [2021-11-20 22:55:32,041 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-20 22:55:32,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 80 [2021-11-20 22:55:32,079 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-20 22:55:32,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 80 [2021-11-20 22:55:32,284 INFO L354 Elim1Store]: treesize reduction 136, result has 16.0 percent of original size [2021-11-20 22:55:32,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 106 [2021-11-20 22:55:32,374 INFO L354 Elim1Store]: treesize reduction 156, result has 17.9 percent of original size [2021-11-20 22:55:32,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 145 treesize of output 123 [2021-11-20 22:55:33,251 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-20 22:55:33,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 107 treesize of output 62 [2021-11-20 22:55:33,261 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-20 22:55:33,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 30 [2021-11-20 22:55:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:55:33,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:55:56,878 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32))))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))))) is different from false [2021-11-20 22:58:05,790 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_192| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_14| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_36| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_192|))))) (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_93| (_ BitVec 32))) (and (let ((.cse0 (bvadd |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_14| (_ bv12 32)))) (or (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_14|) .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_93| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_36|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_93|))))))))) (let ((.cse1 (bvadd |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_14| (_ bv12 32)))) (and (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_14|) .cse1) (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_192| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_36|)))))) is different from false [2021-11-20 22:58:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 5 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:20,370 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:58:20,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31538009] [2021-11-20 22:58:20,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31538009] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:58:20,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [415103424] [2021-11-20 22:58:20,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:20,371 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 22:58:20,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 22:58:20,372 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 22:58:20,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-20 22:58:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:20,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-20 22:58:20,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:20,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:58:20,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:58:20,865 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:58:20,866 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 [2021-11-20 22:58:20,881 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 [2021-11-20 22:58:20,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:58:20,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:58:21,016 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2021-11-20 22:58:21,022 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 45 treesize of output 44 [2021-11-20 22:58:21,213 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-20 22:58:21,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 84 [2021-11-20 22:58:21,253 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-20 22:58:21,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 64 [2021-11-20 22:58:21,433 INFO L354 Elim1Store]: treesize reduction 136, result has 16.0 percent of original size [2021-11-20 22:58:21,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 106 [2021-11-20 22:58:21,491 INFO L354 Elim1Store]: treesize reduction 214, result has 17.1 percent of original size [2021-11-20 22:58:21,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 163 [2021-11-20 22:58:21,828 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-20 22:58:21,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 107 treesize of output 62 [2021-11-20 22:58:21,839 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-20 22:58:21,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 30 [2021-11-20 22:58:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:21,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:59:21,738 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_38| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_16| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_93| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_93|))))) (let ((.cse0 (bvadd |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_16| (_ bv12 32)))) (or (not (bvule .cse0 (select (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_93| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_38|))) (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_16|) .cse0)))))) (let ((.cse2 (bvadd |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_16| (_ bv12 32)))) (let ((.cse1 (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_16|) .cse2)) (.cse3 (bvadd |c_node_create_#res#1.offset| (_ bv12 32)))) (and (or (= |c_node_create_#res#1.offset| (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_16|)) .cse1) (bvule .cse2 (select |c_#length| |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_38|)) (or (= |c_node_create_#res#1.base| |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_38|) .cse1) (bvule (bvadd |c_node_create_#res#1.offset| (_ bv8 32)) .cse3) (bvule .cse3 (select |c_#length| |c_node_create_#res#1.base|))))))) is different from true [2021-11-20 22:59:25,451 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_38| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_16| (_ BitVec 32))) (or (let ((.cse1 (bvadd |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_16| (_ bv12 32)))) (let ((.cse0 (bvadd |c_node_create_~temp~0#1.offset| (_ bv12 32))) (.cse2 (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_16|) .cse1))) (and (bvule (bvadd |c_node_create_~temp~0#1.offset| (_ bv8 32)) .cse0) (bvule .cse0 (select |c_#length| |c_node_create_~temp~0#1.base|)) (bvule .cse1 (select |c_#length| |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_38|)) (or .cse2 (= |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_38| |c_node_create_~temp~0#1.base|)) (or .cse2 (= |c_node_create_~temp~0#1.offset| (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_16|)))))) (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_93| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_93|))))) (let ((.cse3 (bvadd |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_16| (_ bv12 32)))) (or (not (bvule .cse3 (select (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_93| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_38|))) (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_16|) .cse3)))))))) is different from false [2021-11-20 23:00:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-11-20 23:00:13,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [415103424] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:00:13,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898484317] [2021-11-20 23:00:13,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:00:13,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:00:13,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:00:13,301 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:00:13,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e80abb7-5f31-4990-9019-97d9a2fe33d5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-20 23:00:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:00:13,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-20 23:00:13,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:00:13,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:00:20,529 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:00:20,529 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 [2021-11-20 23:00:20,546 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 [2021-11-20 23:00:29,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:00:29,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:00:31,894 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 19 treesize of output 18 [2021-11-20 23:00:31,909 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 19 treesize of output 18 [2021-11-20 23:00:37,083 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-20 23:00:37,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 73 [2021-11-20 23:00:37,134 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-20 23:00:37,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 77 [2021-11-20 23:00:39,702 INFO L354 Elim1Store]: treesize reduction 136, result has 16.0 percent of original size [2021-11-20 23:00:39,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 104 [2021-11-20 23:00:39,795 INFO L354 Elim1Store]: treesize reduction 146, result has 16.1 percent of original size [2021-11-20 23:00:39,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 90 [2021-11-20 23:00:49,637 INFO L354 Elim1Store]: treesize reduction 88, result has 1.1 percent of original size [2021-11-20 23:00:49,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 64 [2021-11-20 23:00:49,647 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-11-20 23:00:49,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 35 [2021-11-20 23:00:49,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:00:49,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:02:44,194 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_24| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101| (_ BitVec 32))) (and (let ((.cse0 (bvadd |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18| (_ bv12 32))) (.cse1 (select (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40|))) (or (not (bvule .cse0 .cse1)) (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18|) .cse0)) (and (= |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101| |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40|) (not (bvule (bvadd (_ bv16 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18|) .cse1))) (= |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_24| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101|))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101|))))))))) (let ((.cse2 (bvadd (_ bv16 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18|)) (.cse4 (not (= |c_node_create_#res#1.base| |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40|))) (.cse5 (bvadd |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18| (_ bv12 32))) (.cse3 (select |c_#length| |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40|))) (and (or (bvule .cse2 .cse3) .cse4) (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18|) .cse5) (or (bvule .cse5 .cse2) .cse4) (not (= |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_24| |c_node_create_#res#1.base|)) (bvule .cse5 .cse3))))) is different from false [2021-11-20 23:02:49,581 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_24| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101| (_ BitVec 32))) (and (let ((.cse0 (bvadd |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18| (_ bv12 32))) (.cse1 (select (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40|))) (or (not (bvule .cse0 .cse1)) (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18|) .cse0)) (and (= |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101| |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40|) (not (bvule (bvadd (_ bv16 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18|) .cse1))) (= |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_24| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101|))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101|))))))))) (let ((.cse2 (bvadd (_ bv16 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18|)) (.cse4 (not (= |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40| |c_node_create_~temp~0#1.base|))) (.cse5 (bvadd |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18| (_ bv12 32))) (.cse3 (select |c_#length| |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40|))) (and (or (bvule .cse2 .cse3) .cse4) (not (= |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_24| |c_node_create_~temp~0#1.base|)) (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18|) .cse5) (or (bvule .cse5 .cse2) .cse4) (bvule .cse5 .cse3))))) is different from false [2021-11-20 23:03:01,941 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_208| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_24| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101| (_ BitVec 32))) (and (let ((.cse0 (bvadd |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18| (_ bv12 32))) (.cse1 (select (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40|))) (or (not (bvule .cse0 .cse1)) (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18|) .cse0)) (and (= |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101| |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40|) (not (bvule (bvadd (_ bv16 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18|) .cse1))) (= |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_24| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101|))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101|))))))))) (let ((.cse3 (select (store |c_#length| |v_node_create_~temp~0#1.base_208| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40|)) (.cse2 (bvadd |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18| (_ bv12 32)))) (and (bvule .cse2 .cse3) (or (bvule (bvadd (_ bv16 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18|) .cse3) (not (= |v_node_create_~temp~0#1.base_208| |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40|))) (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18|) .cse2) (not (= |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_24| |v_node_create_~temp~0#1.base_208|)))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_208|))))))) is different from false [2021-11-20 23:03:24,786 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 23:03:24,786 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 40 treesize of output 39 [2021-11-20 23:03:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-11-20 23:03:33,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898484317] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:03:33,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:03:33,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20, 19, 21, 20] total 64 [2021-11-20 23:03:33,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051914772] [2021-11-20 23:03:33,614 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:03:33,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-20 23:03:33,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:03:33,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-20 23:03:33,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=3039, Unknown=79, NotChecked=826, Total=4160 [2021-11-20 23:03:33,618 INFO L87 Difference]: Start difference. First operand 128 states and 146 transitions. Second operand has 65 states, 64 states have (on average 1.78125) internal successors, (114), 54 states have internal predecessors, (114), 4 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 23:03:37,199 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_node_create_~temp~0#1.base_192| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_14| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_36| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_192|))))) (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_93| (_ BitVec 32))) (and (let ((.cse0 (bvadd |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_14| (_ bv12 32)))) (or (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_14|) .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_93| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_36|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_93|))))))))) (let ((.cse1 (bvadd |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_14| (_ bv12 32)))) (and (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_14|) .cse1) (bvule .cse1 (select (store |c_#length| |v_node_create_~temp~0#1.base_192| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_36|)))))) (= |c_old(#valid)| |c_#valid|) (= |c_#length| |c_old(#length)|) (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_208| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_24| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101| (_ BitVec 32))) (and (let ((.cse2 (bvadd |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18| (_ bv12 32))) (.cse3 (select (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40|))) (or (not (bvule .cse2 .cse3)) (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18|) .cse2)) (and (= |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101| |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40|) (not (bvule (bvadd (_ bv16 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18|) .cse3))) (= |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_24| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101|))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101|))))))))) (let ((.cse5 (select (store |c_#length| |v_node_create_~temp~0#1.base_208| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40|)) (.cse4 (bvadd |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18| (_ bv12 32)))) (and (bvule .cse4 .cse5) (or (bvule (bvadd (_ bv16 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18|) .cse5) (not (= |v_node_create_~temp~0#1.base_208| |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40|))) (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18|) .cse4) (not (= |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_24| |v_node_create_~temp~0#1.base_208|)))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_208|)))))))) is different from false [2021-11-20 23:03:39,222 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |c_#valid| |c_node_create_~temp~0#1.base|)))) (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_24| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101| (_ BitVec 32))) (and (let ((.cse0 (bvadd |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18| (_ bv12 32))) (.cse1 (select (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40|))) (or (not (bvule .cse0 .cse1)) (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18|) .cse0)) (and (= |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101| |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40|) (not (bvule (bvadd (_ bv16 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18|) .cse1))) (= |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_24| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101|))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101|))))))))) (let ((.cse2 (bvadd (_ bv16 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18|)) (.cse4 (not (= |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40| |c_node_create_~temp~0#1.base|))) (.cse5 (bvadd |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18| (_ bv12 32))) (.cse3 (select |c_#length| |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40|))) (and (or (bvule .cse2 .cse3) .cse4) (not (= |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_24| |c_node_create_~temp~0#1.base|)) (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18|) .cse5) (or (bvule .cse5 .cse2) .cse4) (bvule .cse5 .cse3))))) (= |c_node_create_~temp~0#1.offset| (_ bv0 32)) (= |c_#length| (store |c_old(#length)| |c_node_create_~temp~0#1.base| (_ bv12 32))) (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_38| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_16| (_ BitVec 32))) (or (let ((.cse7 (bvadd |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_16| (_ bv12 32)))) (let ((.cse6 (bvadd |c_node_create_~temp~0#1.offset| (_ bv12 32))) (.cse8 (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_16|) .cse7))) (and (bvule (bvadd |c_node_create_~temp~0#1.offset| (_ bv8 32)) .cse6) (bvule .cse6 (select |c_#length| |c_node_create_~temp~0#1.base|)) (bvule .cse7 (select |c_#length| |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_38|)) (or .cse8 (= |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_38| |c_node_create_~temp~0#1.base|)) (or .cse8 (= |c_node_create_~temp~0#1.offset| (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_16|)))))) (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_93| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_93|))))) (let ((.cse9 (bvadd |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_16| (_ bv12 32)))) (or (not (bvule .cse9 (select (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_93| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_38|))) (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_16|) .cse9)))))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |c_node_create_~temp~0#1.base|)))) (= (select |c_#length| |c_node_create_~temp~0#1.base|) (_ bv12 32))) is different from false [2021-11-20 23:03:41,250 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |c_node_create_#res#1.base|)))) (= |c_#length| (store |c_old(#length)| |c_node_create_#res#1.base| (_ bv12 32))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| |c_node_create_#res#1.base|)) (_ bv1 1))) (= (select |c_#length| |c_node_create_#res#1.base|) (_ bv12 32)) (= |c_node_create_#res#1.offset| (_ bv0 32)) (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_24| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101| (_ BitVec 32))) (and (let ((.cse0 (bvadd |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18| (_ bv12 32))) (.cse1 (select (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40|))) (or (not (bvule .cse0 .cse1)) (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18|) .cse0)) (and (= |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101| |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40|) (not (bvule (bvadd (_ bv16 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18|) .cse1))) (= |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_24| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101|))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_101|))))))))) (let ((.cse2 (bvadd (_ bv16 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18|)) (.cse4 (not (= |c_node_create_#res#1.base| |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40|))) (.cse5 (bvadd |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18| (_ bv12 32))) (.cse3 (select |c_#length| |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_40|))) (and (or (bvule .cse2 .cse3) .cse4) (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_18|) .cse5) (or (bvule .cse5 .cse2) .cse4) (not (= |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_24| |c_node_create_#res#1.base|)) (bvule .cse5 .cse3))))) (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_38| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_16| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_93| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_93|))))) (let ((.cse6 (bvadd |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_16| (_ bv12 32)))) (or (not (bvule .cse6 (select (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_93| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_38|))) (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_16|) .cse6)))))) (let ((.cse8 (bvadd |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_16| (_ bv12 32)))) (let ((.cse7 (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_16|) .cse8)) (.cse9 (bvadd |c_node_create_#res#1.offset| (_ bv12 32)))) (and (or (= |c_node_create_#res#1.offset| (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_16|)) .cse7) (bvule .cse8 (select |c_#length| |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_38|)) (or (= |c_node_create_#res#1.base| |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_38|) .cse7) (bvule (bvadd |c_node_create_#res#1.offset| (_ bv8 32)) .cse9) (bvule .cse9 (select |c_#length| |c_node_create_#res#1.base|)))))))) is different from false