./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_append_unequal.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_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/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_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/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_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/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 9aabbeff87ba819b44dc608a3105d0ba81b71cd88693ecf2e6bf3860a7863e64 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:32:30,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:32:30,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:32:30,951 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:32:30,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:32:30,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:32:30,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:32:30,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:32:30,961 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:32:30,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:32:30,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:32:30,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:32:30,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:32:30,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:32:30,969 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:32:30,971 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:32:30,972 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:32:30,973 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:32:30,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:32:30,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:32:30,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:32:30,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:32:30,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:32:30,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:32:30,990 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:32:30,990 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:32:30,991 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:32:30,992 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:32:30,993 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:32:30,994 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:32:30,994 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:32:30,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:32:30,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:32:30,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:32:30,999 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:32:30,999 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:32:31,000 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:32:31,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:32:31,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:32:31,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:32:31,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:32:31,005 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-20 23:32:31,032 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:32:31,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:32:31,033 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:32:31,033 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:32:31,034 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:32:31,034 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:32:31,035 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:32:31,035 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:32:31,035 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:32:31,036 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:32:31,036 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:32:31,037 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:32:31,037 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:32:31,037 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:32:31,038 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:32:31,038 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:32:31,038 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:32:31,039 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:32:31,040 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 23:32:31,040 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 23:32:31,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:32:31,041 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:32:31,041 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 23:32:31,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:32:31,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:32:31,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:32:31,042 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 23:32:31,043 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 23:32:31,043 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 23:32:31,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:32:31,043 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 23:32:31,044 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:32:31,044 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:32:31,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:32:31,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:32:31,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:32:31,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:32:31,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:32:31,046 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:32:31,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:32:31,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:32:31,047 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:32:31,047 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_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aabbeff87ba819b44dc608a3105d0ba81b71cd88693ecf2e6bf3860a7863e64 [2021-11-20 23:32:31,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:32:31,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:32:31,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:32:31,330 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:32:31,332 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:32:31,334 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-simple/dll2c_append_unequal.i [2021-11-20 23:32:31,421 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/data/baf310d56/e4fb37efcace4ec69d175b7986add6fd/FLAG740e3ef68 [2021-11-20 23:32:32,007 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:32:32,010 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/sv-benchmarks/c/list-simple/dll2c_append_unequal.i [2021-11-20 23:32:32,035 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/data/baf310d56/e4fb37efcace4ec69d175b7986add6fd/FLAG740e3ef68 [2021-11-20 23:32:32,285 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/data/baf310d56/e4fb37efcace4ec69d175b7986add6fd [2021-11-20 23:32:32,288 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:32:32,291 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:32:32,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:32:32,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:32:32,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:32:32,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:32:32" (1/1) ... [2021-11-20 23:32:32,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@611e1aae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:32, skipping insertion in model container [2021-11-20 23:32:32,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:32:32" (1/1) ... [2021-11-20 23:32:32,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:32:32,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:32:32,719 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_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/sv-benchmarks/c/list-simple/dll2c_append_unequal.i[24672,24685] [2021-11-20 23:32:32,724 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:32:32,737 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:32:32,806 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_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/sv-benchmarks/c/list-simple/dll2c_append_unequal.i[24672,24685] [2021-11-20 23:32:32,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:32:32,837 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:32:32,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:32 WrapperNode [2021-11-20 23:32:32,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:32:32,839 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:32:32,840 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:32:32,840 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:32:32,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:32" (1/1) ... [2021-11-20 23:32:32,875 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:32" (1/1) ... [2021-11-20 23:32:32,900 INFO L137 Inliner]: procedures = 127, calls = 49, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 152 [2021-11-20 23:32:32,901 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:32:32,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:32:32,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:32:32,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:32:32,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:32" (1/1) ... [2021-11-20 23:32:32,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:32" (1/1) ... [2021-11-20 23:32:32,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:32" (1/1) ... [2021-11-20 23:32:32,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:32" (1/1) ... [2021-11-20 23:32:32,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:32" (1/1) ... [2021-11-20 23:32:32,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:32" (1/1) ... [2021-11-20 23:32:32,935 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:32" (1/1) ... [2021-11-20 23:32:32,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:32:32,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:32:32,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:32:32,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:32:32,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:32" (1/1) ... [2021-11-20 23:32:32,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:32:32,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:32:32,996 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:32:33,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:32:33,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:32:33,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:32:33,040 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-20 23:32:33,041 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-20 23:32:33,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:32:33,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:32:33,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:32:33,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:32:33,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:32:33,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:32:33,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:32:33,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:32:33,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:32:33,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:32:33,207 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:32:33,225 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:32:33,598 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:32:33,649 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:32:33,649 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 23:32:33,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:32:33 BoogieIcfgContainer [2021-11-20 23:32:33,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:32:33,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:32:33,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:32:33,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:32:33,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:32:32" (1/3) ... [2021-11-20 23:32:33,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3538bb97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:32:33, skipping insertion in model container [2021-11-20 23:32:33,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:32" (2/3) ... [2021-11-20 23:32:33,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3538bb97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:32:33, skipping insertion in model container [2021-11-20 23:32:33,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:32:33" (3/3) ... [2021-11-20 23:32:33,662 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_append_unequal.i [2021-11-20 23:32:33,668 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:32:33,668 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 64 error locations. [2021-11-20 23:32:33,715 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:32:33,723 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 23:32:33,723 INFO L340 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2021-11-20 23:32:33,745 INFO L276 IsEmpty]: Start isEmpty. Operand has 124 states, 55 states have (on average 2.3636363636363638) internal successors, (130), 119 states have internal predecessors, (130), 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 23:32:33,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 23:32:33,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:33,753 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 23:32:33,754 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 60 more)] === [2021-11-20 23:32:33,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:33,760 INFO L85 PathProgramCache]: Analyzing trace with hash 236278568, now seen corresponding path program 1 times [2021-11-20 23:32:33,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:33,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169986356] [2021-11-20 23:32:33,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:33,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:33,934 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 23:32:33,935 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:33,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169986356] [2021-11-20 23:32:33,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169986356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:33,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:32:33,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:32:33,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804447198] [2021-11-20 23:32:33,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:33,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:32:33,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:33,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:32:33,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:32:33,975 INFO L87 Difference]: Start difference. First operand has 124 states, 55 states have (on average 2.3636363636363638) internal successors, (130), 119 states have internal predecessors, (130), 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) 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 23:32:34,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:34,125 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2021-11-20 23:32:34,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:32:34,133 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 23:32:34,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:34,145 INFO L225 Difference]: With dead ends: 121 [2021-11-20 23:32:34,145 INFO L226 Difference]: Without dead ends: 119 [2021-11-20 23:32:34,147 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 23:32:34,154 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 8 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:34,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 168 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:32:34,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-20 23:32:34,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-11-20 23:32:34,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 54 states have (on average 2.259259259259259) internal successors, (122), 114 states have internal predecessors, (122), 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 23:32:34,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 128 transitions. [2021-11-20 23:32:34,202 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 128 transitions. Word has length 5 [2021-11-20 23:32:34,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:34,203 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 128 transitions. [2021-11-20 23:32:34,203 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 23:32:34,203 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 128 transitions. [2021-11-20 23:32:34,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 23:32:34,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:34,204 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 23:32:34,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:32:34,217 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 60 more)] === [2021-11-20 23:32:34,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:34,218 INFO L85 PathProgramCache]: Analyzing trace with hash 236278569, now seen corresponding path program 1 times [2021-11-20 23:32:34,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:34,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392815672] [2021-11-20 23:32:34,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:34,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:34,326 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 23:32:34,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:34,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392815672] [2021-11-20 23:32:34,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392815672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:34,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:32:34,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:32:34,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565392264] [2021-11-20 23:32:34,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:34,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:32:34,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:34,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:32:34,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:32:34,333 INFO L87 Difference]: Start difference. First operand 119 states and 128 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 23:32:34,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:34,486 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2021-11-20 23:32:34,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:32:34,486 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 23:32:34,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:34,488 INFO L225 Difference]: With dead ends: 116 [2021-11-20 23:32:34,488 INFO L226 Difference]: Without dead ends: 116 [2021-11-20 23:32:34,489 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 23:32:34,491 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 3 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:34,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 173 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:32:34,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-20 23:32:34,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-11-20 23:32:34,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 54 states have (on average 2.2037037037037037) internal successors, (119), 111 states have internal predecessors, (119), 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 23:32:34,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2021-11-20 23:32:34,503 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 5 [2021-11-20 23:32:34,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:34,504 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2021-11-20 23:32:34,504 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 23:32:34,504 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2021-11-20 23:32:34,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 23:32:34,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:34,505 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:34,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:32:34,506 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 60 more)] === [2021-11-20 23:32:34,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:34,507 INFO L85 PathProgramCache]: Analyzing trace with hash 2064311437, now seen corresponding path program 1 times [2021-11-20 23:32:34,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:34,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015896946] [2021-11-20 23:32:34,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:34,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:34,587 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 23:32:34,588 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:34,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015896946] [2021-11-20 23:32:34,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015896946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:34,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:32:34,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:32:34,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863395746] [2021-11-20 23:32:34,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:34,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:32:34,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:34,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:32:34,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:32:34,595 INFO L87 Difference]: Start difference. First operand 116 states and 125 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 23:32:34,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:34,646 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2021-11-20 23:32:34,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:32:34,647 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 23:32:34,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:34,649 INFO L225 Difference]: With dead ends: 127 [2021-11-20 23:32:34,654 INFO L226 Difference]: Without dead ends: 127 [2021-11-20 23:32:34,654 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 23:32:34,656 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 10 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:34,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 219 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:32:34,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-20 23:32:34,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 117. [2021-11-20 23:32:34,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 112 states have internal predecessors, (120), 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 23:32:34,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 126 transitions. [2021-11-20 23:32:34,672 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 126 transitions. Word has length 11 [2021-11-20 23:32:34,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:34,673 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 126 transitions. [2021-11-20 23:32:34,673 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 23:32:34,673 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 126 transitions. [2021-11-20 23:32:34,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 23:32:34,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:34,675 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:34,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:32:34,675 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 60 more)] === [2021-11-20 23:32:34,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:34,676 INFO L85 PathProgramCache]: Analyzing trace with hash 260826486, now seen corresponding path program 1 times [2021-11-20 23:32:34,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:34,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863122844] [2021-11-20 23:32:34,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:34,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:34,768 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 23:32:34,768 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:34,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863122844] [2021-11-20 23:32:34,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863122844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:34,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:32:34,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:32:34,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041261267] [2021-11-20 23:32:34,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:34,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:32:34,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:34,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:32:34,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:32:34,771 INFO L87 Difference]: Start difference. First operand 117 states and 126 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 23:32:35,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:35,021 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2021-11-20 23:32:35,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:32:35,022 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 23:32:35,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:35,027 INFO L225 Difference]: With dead ends: 117 [2021-11-20 23:32:35,027 INFO L226 Difference]: Without dead ends: 117 [2021-11-20 23:32:35,028 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 23:32:35,031 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 18 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:35,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 316 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:32:35,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-20 23:32:35,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2021-11-20 23:32:35,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 111 states have internal predecessors, (119), 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 23:32:35,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2021-11-20 23:32:35,057 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 19 [2021-11-20 23:32:35,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:35,058 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2021-11-20 23:32:35,059 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 23:32:35,059 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2021-11-20 23:32:35,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 23:32:35,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:35,060 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:35,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:32:35,061 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 60 more)] === [2021-11-20 23:32:35,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:35,063 INFO L85 PathProgramCache]: Analyzing trace with hash 260826487, now seen corresponding path program 1 times [2021-11-20 23:32:35,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:35,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260986353] [2021-11-20 23:32:35,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:35,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:35,205 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 23:32:35,205 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:35,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260986353] [2021-11-20 23:32:35,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260986353] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:35,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:32:35,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:32:35,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167876278] [2021-11-20 23:32:35,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:35,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:32:35,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:35,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:32:35,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:32:35,208 INFO L87 Difference]: Start difference. First operand 116 states and 125 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 23:32:35,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:35,451 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2021-11-20 23:32:35,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:32:35,451 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 23:32:35,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:35,453 INFO L225 Difference]: With dead ends: 116 [2021-11-20 23:32:35,453 INFO L226 Difference]: Without dead ends: 116 [2021-11-20 23:32:35,453 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 23:32:35,454 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 16 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:35,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 340 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:32:35,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-20 23:32:35,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-11-20 23:32:35,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 110 states have internal predecessors, (118), 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 23:32:35,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2021-11-20 23:32:35,464 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 19 [2021-11-20 23:32:35,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:35,464 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2021-11-20 23:32:35,465 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 23:32:35,465 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2021-11-20 23:32:35,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 23:32:35,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:35,466 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:35,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:32:35,466 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 60 more)] === [2021-11-20 23:32:35,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:35,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1546149591, now seen corresponding path program 1 times [2021-11-20 23:32:35,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:35,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683141747] [2021-11-20 23:32:35,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:35,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:35,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:35,711 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 23:32:35,711 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:35,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683141747] [2021-11-20 23:32:35,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683141747] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:32:35,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114655447] [2021-11-20 23:32:35,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:35,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:32:35,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:32:35,716 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:32:35,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:32:35,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:35,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 23:32:35,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:32:35,850 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 23:32:36,036 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 23:32:36,037 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 17 treesize of output 21 [2021-11-20 23:32:36,156 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 23:32:36,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:32:36,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114655447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:32:36,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1031175611] [2021-11-20 23:32:36,264 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-20 23:32:36,264 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:32:36,269 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:32:36,274 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:32:36,275 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:32:36,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:32:36,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:32:36,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-20 23:32:36,472 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-20 23:32:36,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 41 [2021-11-20 23:32:36,521 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 23:32:36,529 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 23:32:36,569 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 23:32:36,575 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 23:32:36,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 23:32:36,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:32:36,600 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 23:32:36,619 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 23:32:36,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:32:36,630 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 23:32:36,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 23:32:36,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:32:36,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:32:36,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:32:36,674 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 23:32:36,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:32:36,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:32:36,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:32:36,700 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 23:32:36,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:32:36,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:32:36,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-20 23:32:36,922 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-20 23:32:36,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 41 [2021-11-20 23:32:37,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:32:37,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:32:37,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-20 23:32:37,768 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-20 23:32:37,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 20 [2021-11-20 23:32:37,844 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 23:32:37,858 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 23:32:37,883 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 23:32:37,972 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 23:32:38,005 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 23:32:38,070 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-20 23:32:38,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 20 [2021-11-20 23:32:38,165 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 23:32:38,191 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 23:32:38,219 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 23:32:38,242 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 23:32:38,267 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 23:32:38,653 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 23:32:38,675 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 23:32:38,692 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 23:32:39,103 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-20 23:32:39,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 20 [2021-11-20 23:32:39,201 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-20 23:32:39,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 41 [2021-11-20 23:32:39,257 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 93 for LOIs [2021-11-20 23:32:41,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:32:41,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 23:32:41,568 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 23:32:41,571 INFO L158 Benchmark]: Toolchain (without parser) took 9280.55ms. Allocated memory was 96.5MB in the beginning and 176.2MB in the end (delta: 79.7MB). Free memory was 61.6MB in the beginning and 78.9MB in the end (delta: -17.3MB). Peak memory consumption was 63.4MB. Max. memory is 16.1GB. [2021-11-20 23:32:41,572 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 96.5MB. Free memory was 49.0MB in the beginning and 48.9MB in the end (delta: 42.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:32:41,572 INFO L158 Benchmark]: CACSL2BoogieTranslator took 544.57ms. Allocated memory is still 96.5MB. Free memory was 61.2MB in the beginning and 63.7MB in the end (delta: -2.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 23:32:41,572 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.78ms. Allocated memory is still 96.5MB. Free memory was 63.7MB in the beginning and 61.5MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:32:41,573 INFO L158 Benchmark]: Boogie Preprocessor took 49.79ms. Allocated memory is still 96.5MB. Free memory was 61.5MB in the beginning and 59.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:32:41,573 INFO L158 Benchmark]: RCFGBuilder took 700.33ms. Allocated memory was 96.5MB in the beginning and 119.5MB in the end (delta: 23.1MB). Free memory was 59.5MB in the beginning and 84.8MB in the end (delta: -25.3MB). Peak memory consumption was 19.8MB. Max. memory is 16.1GB. [2021-11-20 23:32:41,574 INFO L158 Benchmark]: TraceAbstraction took 7916.06ms. Allocated memory was 119.5MB in the beginning and 176.2MB in the end (delta: 56.6MB). Free memory was 84.3MB in the beginning and 78.9MB in the end (delta: 5.4MB). Peak memory consumption was 63.1MB. Max. memory is 16.1GB. [2021-11-20 23:32:41,576 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 96.5MB. Free memory was 49.0MB in the beginning and 48.9MB in the end (delta: 42.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 544.57ms. Allocated memory is still 96.5MB. Free memory was 61.2MB in the beginning and 63.7MB in the end (delta: -2.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.78ms. Allocated memory is still 96.5MB. Free memory was 63.7MB in the beginning and 61.5MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.79ms. Allocated memory is still 96.5MB. Free memory was 61.5MB in the beginning and 59.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 700.33ms. Allocated memory was 96.5MB in the beginning and 119.5MB in the end (delta: 23.1MB). Free memory was 59.5MB in the beginning and 84.8MB in the end (delta: -25.3MB). Peak memory consumption was 19.8MB. Max. memory is 16.1GB. * TraceAbstraction took 7916.06ms. Allocated memory was 119.5MB in the beginning and 176.2MB in the end (delta: 56.6MB). Free memory was 84.3MB in the beginning and 78.9MB in the end (delta: 5.4MB). Peak memory consumption was 63.1MB. 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 23:32:41,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/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_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/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_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/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_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/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 9aabbeff87ba819b44dc608a3105d0ba81b71cd88693ecf2e6bf3860a7863e64 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:32:44,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:32:44,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:32:44,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:32:44,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:32:44,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:32:44,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:32:44,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:32:44,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:32:44,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:32:44,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:32:44,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:32:44,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:32:44,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:32:44,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:32:44,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:32:44,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:32:44,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:32:44,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:32:44,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:32:44,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:32:44,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:32:44,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:32:44,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:32:44,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:32:44,214 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:32:44,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:32:44,216 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:32:44,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:32:44,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:32:44,218 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:32:44,219 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:32:44,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:32:44,224 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:32:44,225 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:32:44,226 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:32:44,227 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:32:44,227 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:32:44,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:32:44,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:32:44,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:32:44,232 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-20 23:32:44,282 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:32:44,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:32:44,283 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:32:44,283 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:32:44,284 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:32:44,284 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:32:44,285 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:32:44,285 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:32:44,286 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:32:44,286 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:32:44,287 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:32:44,287 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:32:44,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 23:32:44,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 23:32:44,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:32:44,289 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:32:44,290 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 23:32:44,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:32:44,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:32:44,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:32:44,290 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 23:32:44,290 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 23:32:44,291 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 23:32:44,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:32:44,291 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 23:32:44,291 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 23:32:44,291 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 23:32:44,292 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:32:44,292 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:32:44,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:32:44,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 23:32:44,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:32:44,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:32:44,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:32:44,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:32:44,294 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-20 23:32:44,294 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 23:32:44,294 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:32:44,294 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:32:44,294 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_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aabbeff87ba819b44dc608a3105d0ba81b71cd88693ecf2e6bf3860a7863e64 [2021-11-20 23:32:44,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:32:44,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:32:44,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:32:44,717 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:32:44,718 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:32:44,719 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-simple/dll2c_append_unequal.i [2021-11-20 23:32:44,807 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/data/b4a7f6ee1/2f549481c2ed438690e3861ee6caa3ac/FLAG967c78b3c [2021-11-20 23:32:45,454 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:32:45,455 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/sv-benchmarks/c/list-simple/dll2c_append_unequal.i [2021-11-20 23:32:45,468 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/data/b4a7f6ee1/2f549481c2ed438690e3861ee6caa3ac/FLAG967c78b3c [2021-11-20 23:32:45,712 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/data/b4a7f6ee1/2f549481c2ed438690e3861ee6caa3ac [2021-11-20 23:32:45,715 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:32:45,717 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:32:45,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:32:45,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:32:45,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:32:45,726 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:32:45" (1/1) ... [2021-11-20 23:32:45,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34ea4933 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:45, skipping insertion in model container [2021-11-20 23:32:45,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:32:45" (1/1) ... [2021-11-20 23:32:45,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:32:45,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:32:46,126 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_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/sv-benchmarks/c/list-simple/dll2c_append_unequal.i[24672,24685] [2021-11-20 23:32:46,128 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:32:46,142 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:32:46,199 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_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/sv-benchmarks/c/list-simple/dll2c_append_unequal.i[24672,24685] [2021-11-20 23:32:46,208 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:32:46,254 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:32:46,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:46 WrapperNode [2021-11-20 23:32:46,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:32:46,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:32:46,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:32:46,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:32:46,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:46" (1/1) ... [2021-11-20 23:32:46,288 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:46" (1/1) ... [2021-11-20 23:32:46,328 INFO L137 Inliner]: procedures = 130, calls = 49, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 153 [2021-11-20 23:32:46,328 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:32:46,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:32:46,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:32:46,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:32:46,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:46" (1/1) ... [2021-11-20 23:32:46,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:46" (1/1) ... [2021-11-20 23:32:46,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:46" (1/1) ... [2021-11-20 23:32:46,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:46" (1/1) ... [2021-11-20 23:32:46,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:46" (1/1) ... [2021-11-20 23:32:46,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:46" (1/1) ... [2021-11-20 23:32:46,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:46" (1/1) ... [2021-11-20 23:32:46,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:32:46,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:32:46,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:32:46,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:32:46,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:46" (1/1) ... [2021-11-20 23:32:46,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:32:46,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:32:46,433 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:32:46,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:32:46,471 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 23:32:46,471 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-20 23:32:46,472 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-20 23:32:46,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:32:46,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:32:46,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:32:46,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:32:46,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:32:46,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:32:46,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 23:32:46,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:32:46,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 23:32:46,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:32:46,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:32:46,664 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:32:46,666 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:32:47,387 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:32:47,396 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:32:47,397 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 23:32:47,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:32:47 BoogieIcfgContainer [2021-11-20 23:32:47,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:32:47,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:32:47,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:32:47,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:32:47,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:32:45" (1/3) ... [2021-11-20 23:32:47,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f7e9d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:32:47, skipping insertion in model container [2021-11-20 23:32:47,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:46" (2/3) ... [2021-11-20 23:32:47,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f7e9d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:32:47, skipping insertion in model container [2021-11-20 23:32:47,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:32:47" (3/3) ... [2021-11-20 23:32:47,408 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_append_unequal.i [2021-11-20 23:32:47,414 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:32:47,414 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 64 error locations. [2021-11-20 23:32:47,458 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:32:47,465 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 23:32:47,465 INFO L340 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2021-11-20 23:32:47,509 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 133 states have internal predecessors, (146), 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 23:32:47,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 23:32:47,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:47,517 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 23:32:47,517 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 60 more)] === [2021-11-20 23:32:47,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:47,529 INFO L85 PathProgramCache]: Analyzing trace with hash 895672562, now seen corresponding path program 1 times [2021-11-20 23:32:47,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:32:47,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063169272] [2021-11-20 23:32:47,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:47,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:32:47,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:32:47,544 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:32:47,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 23:32:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:47,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:32:47,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:32:47,744 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 23:32:47,769 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 23:32:47,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:32:47,803 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 23:32:47,804 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:32:47,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063169272] [2021-11-20 23:32:47,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063169272] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:47,806 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:32:47,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 23:32:47,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460674215] [2021-11-20 23:32:47,809 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:47,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:32:47,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:32:47,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:32:47,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:32:47,840 INFO L87 Difference]: Start difference. First operand has 138 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 133 states have internal predecessors, (146), 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) 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 23:32:48,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:48,155 INFO L93 Difference]: Finished difference Result 135 states and 145 transitions. [2021-11-20 23:32:48,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:32:48,158 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 23:32:48,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:48,168 INFO L225 Difference]: With dead ends: 135 [2021-11-20 23:32:48,183 INFO L226 Difference]: Without dead ends: 132 [2021-11-20 23:32:48,185 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 23:32:48,189 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 10 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:48,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 207 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:32:48,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-20 23:32:48,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2021-11-20 23:32:48,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 67 states have (on average 2.014925373134328) internal successors, (135), 127 states have internal predecessors, (135), 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 23:32:48,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 141 transitions. [2021-11-20 23:32:48,269 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 141 transitions. Word has length 6 [2021-11-20 23:32:48,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:48,270 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 141 transitions. [2021-11-20 23:32:48,270 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 23:32:48,271 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 141 transitions. [2021-11-20 23:32:48,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 23:32:48,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:48,271 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 23:32:48,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:32:48,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:32:48,483 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 60 more)] === [2021-11-20 23:32:48,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:48,484 INFO L85 PathProgramCache]: Analyzing trace with hash 895672563, now seen corresponding path program 1 times [2021-11-20 23:32:48,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:32:48,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10695494] [2021-11-20 23:32:48,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:48,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:32:48,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:32:48,489 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:32:48,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 23:32:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:48,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:32:48,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:32:48,608 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 23:32:48,647 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 23:32:48,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:32:48,731 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 23:32:48,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:32:48,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10695494] [2021-11-20 23:32:48,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10695494] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:48,738 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:32:48,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-20 23:32:48,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129058679] [2021-11-20 23:32:48,739 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:48,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:32:48,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:32:48,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:32:48,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:32:48,747 INFO L87 Difference]: Start difference. First operand 132 states and 141 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 23:32:49,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:49,391 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2021-11-20 23:32:49,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:32:49,395 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 23:32:49,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:49,398 INFO L225 Difference]: With dead ends: 129 [2021-11-20 23:32:49,398 INFO L226 Difference]: Without dead ends: 129 [2021-11-20 23:32:49,398 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 23:32:49,399 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 5 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:49,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 285 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 23:32:49,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-20 23:32:49,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-20 23:32:49,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 124 states have internal predecessors, (132), 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 23:32:49,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2021-11-20 23:32:49,428 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 6 [2021-11-20 23:32:49,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:49,428 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2021-11-20 23:32:49,429 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 23:32:49,429 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2021-11-20 23:32:49,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 23:32:49,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:49,430 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:49,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:32:49,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:32:49,630 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 60 more)] === [2021-11-20 23:32:49,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:49,631 INFO L85 PathProgramCache]: Analyzing trace with hash -753542016, now seen corresponding path program 1 times [2021-11-20 23:32:49,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:32:49,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232781965] [2021-11-20 23:32:49,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:49,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:32:49,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:32:49,637 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:32:49,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 23:32:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:49,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:32:49,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:32:49,791 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 23:32:49,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:32:49,833 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 23:32:49,833 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:32:49,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232781965] [2021-11-20 23:32:49,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232781965] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:49,834 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:32:49,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 23:32:49,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357116466] [2021-11-20 23:32:49,835 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:49,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:32:49,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:32:49,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:32:49,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:32:49,836 INFO L87 Difference]: Start difference. First operand 129 states and 138 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 23:32:49,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:49,856 INFO L93 Difference]: Finished difference Result 140 states and 151 transitions. [2021-11-20 23:32:49,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:32:49,857 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 23:32:49,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:49,859 INFO L225 Difference]: With dead ends: 140 [2021-11-20 23:32:49,860 INFO L226 Difference]: Without dead ends: 140 [2021-11-20 23:32:49,860 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 23:32:49,861 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 29 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:49,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 268 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:32:49,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-20 23:32:49,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2021-11-20 23:32:49,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 125 states have internal predecessors, (133), 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 23:32:49,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 139 transitions. [2021-11-20 23:32:49,876 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 139 transitions. Word has length 14 [2021-11-20 23:32:49,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:49,876 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 139 transitions. [2021-11-20 23:32:49,876 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 23:32:49,877 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 139 transitions. [2021-11-20 23:32:49,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 23:32:49,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:49,878 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 23:32:49,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:32:50,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:32:50,089 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 60 more)] === [2021-11-20 23:32:50,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:50,090 INFO L85 PathProgramCache]: Analyzing trace with hash 265974304, now seen corresponding path program 1 times [2021-11-20 23:32:50,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:32:50,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936368600] [2021-11-20 23:32:50,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:50,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:32:50,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:32:50,092 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:32:50,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 23:32:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:50,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:32:50,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:32:50,252 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 23:32:50,345 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 23:32:50,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:32:50,470 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 23:32:50,470 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:32:50,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936368600] [2021-11-20 23:32:50,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936368600] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:50,478 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:32:50,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 23:32:50,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830760655] [2021-11-20 23:32:50,481 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:50,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:32:50,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:32:50,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:32:50,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:32:50,483 INFO L87 Difference]: Start difference. First operand 130 states and 139 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 23:32:51,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:51,144 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2021-11-20 23:32:51,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:32:51,145 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 23:32:51,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:51,148 INFO L225 Difference]: With dead ends: 130 [2021-11-20 23:32:51,148 INFO L226 Difference]: Without dead ends: 130 [2021-11-20 23:32:51,148 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 23:32:51,149 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 20 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:51,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 386 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 23:32:51,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-20 23:32:51,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2021-11-20 23:32:51,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 68 states have (on average 1.9411764705882353) internal successors, (132), 124 states have internal predecessors, (132), 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 23:32:51,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2021-11-20 23:32:51,164 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 24 [2021-11-20 23:32:51,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:51,165 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2021-11-20 23:32:51,165 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 23:32:51,165 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2021-11-20 23:32:51,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 23:32:51,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:51,166 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 23:32:51,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:32:51,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:32:51,367 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 60 more)] === [2021-11-20 23:32:51,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:51,367 INFO L85 PathProgramCache]: Analyzing trace with hash 265974305, now seen corresponding path program 1 times [2021-11-20 23:32:51,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:32:51,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678866404] [2021-11-20 23:32:51,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:51,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:32:51,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:32:51,369 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:32:51,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 23:32:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:51,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 23:32:51,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:32:51,513 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 23:32:51,644 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 23:32:51,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:32:52,075 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 23:32:52,076 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:32:52,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678866404] [2021-11-20 23:32:52,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678866404] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:52,076 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:32:52,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-20 23:32:52,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020321750] [2021-11-20 23:32:52,077 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:52,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:32:52,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:32:52,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:32:52,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:32:52,079 INFO L87 Difference]: Start difference. First operand 129 states and 138 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 23:32:53,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:53,467 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2021-11-20 23:32:53,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:32:53,468 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 23:32:53,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:53,470 INFO L225 Difference]: With dead ends: 129 [2021-11-20 23:32:53,470 INFO L226 Difference]: Without dead ends: 129 [2021-11-20 23:32:53,470 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 23:32:53,471 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 21 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:53,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 548 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 23:32:53,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-20 23:32:53,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2021-11-20 23:32:53,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 68 states have (on average 1.9264705882352942) internal successors, (131), 123 states have internal predecessors, (131), 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 23:32:53,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2021-11-20 23:32:53,481 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 24 [2021-11-20 23:32:53,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:53,481 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2021-11-20 23:32:53,481 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 23:32:53,481 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2021-11-20 23:32:53,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 23:32:53,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:53,482 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 23:32:53,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-20 23:32:53,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:32:53,694 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 60 more)] === [2021-11-20 23:32:53,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:53,695 INFO L85 PathProgramCache]: Analyzing trace with hash -2096731903, now seen corresponding path program 1 times [2021-11-20 23:32:53,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:32:53,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748407608] [2021-11-20 23:32:53,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:53,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:32:53,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:32:53,696 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:32:53,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 23:32:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:53,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 23:32:53,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:32:53,823 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 23:32:54,095 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 23:32:54,096 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 23:32:54,268 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 23:32:54,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:33:18,707 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 23:33:18,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:33:18,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748407608] [2021-11-20 23:33:18,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748407608] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:33:18,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [769414078] [2021-11-20 23:33:18,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:18,708 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:33:18,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:33:18,723 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:33:18,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-20 23:33:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:18,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 23:33:18,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:18,924 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 23:33:23,070 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-20 23:33:23,070 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 23:33:23,175 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 23:33:23,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:33:31,582 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 23:33:31,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [769414078] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:33:31,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:33:31,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8, 6] total 18 [2021-11-20 23:33:31,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168077871] [2021-11-20 23:33:31,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:31,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:33:31,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:33:31,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:33:31,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=270, Unknown=13, NotChecked=0, Total=342 [2021-11-20 23:33:31,585 INFO L87 Difference]: Start difference. First operand 128 states and 137 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 23:33:34,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:34,465 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2021-11-20 23:33:34,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:33:34,466 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 23:33:34,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:34,467 INFO L225 Difference]: With dead ends: 153 [2021-11-20 23:33:34,467 INFO L226 Difference]: Without dead ends: 153 [2021-11-20 23:33:34,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=69, Invalid=297, Unknown=14, NotChecked=0, Total=380 [2021-11-20 23:33:34,469 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 107 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:34,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 456 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 452 Invalid, 0 Unknown, 83 Unchecked, 0.8s Time] [2021-11-20 23:33:34,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-20 23:33:34,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 133. [2021-11-20 23:33:34,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 72 states have (on average 1.9027777777777777) internal successors, (137), 127 states have internal predecessors, (137), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:33:34,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 145 transitions. [2021-11-20 23:33:34,478 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 145 transitions. Word has length 26 [2021-11-20 23:33:34,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:34,478 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 145 transitions. [2021-11-20 23:33:34,479 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 23:33:34,479 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 145 transitions. [2021-11-20 23:33:34,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 23:33:34,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:34,486 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 23:33:34,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 23:33:34,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-20 23:33:34,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 23:33:34,887 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 60 more)] === [2021-11-20 23:33:34,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:34,888 INFO L85 PathProgramCache]: Analyzing trace with hash -2096731902, now seen corresponding path program 1 times [2021-11-20 23:33:34,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:33:34,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140496269] [2021-11-20 23:33:34,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:34,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:33:34,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:33:34,890 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:33:34,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 23:33:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:35,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 23:33:35,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:35,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:33:35,033 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 23:33:35,343 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:33:35,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-11-20 23:33:35,354 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:33:35,354 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 28 treesize of output 28 [2021-11-20 23:33:35,477 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 23:33:35,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:33:42,239 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_6| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_2|))) (and (bvule .cse0 (select |c_#length| |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|) .cse0))) (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 true [2021-11-20 23:33:46,871 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 23:33:48,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-11-20 23:33:48,156 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:33:48,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140496269] [2021-11-20 23:33:48,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140496269] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:33:48,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [600106598] [2021-11-20 23:33:48,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:48,157 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:33:48,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:33:48,157 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:33:48,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-20 23:33:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:48,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 23:33:48,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:48,358 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 23:33:48,369 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 23:33:48,673 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:33:48,673 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 23:33:48,685 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:33:48,685 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 23:33:48,760 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 23:33:48,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:33:53,324 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (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_4|))) (or (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_4|) .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_8|))))))) (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_4|))) (and (bvule .cse1 (select |c_#length| |v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_8|)) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_4|) .cse1))))) is different from true [2021-11-20 23:33:57,869 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_~head~0#1.base_BEFORE_CALL_8| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_60| (_ BitVec 32))) (or (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_4|))) (or (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_4|) .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_8|))))))) (let ((.cse1 (bvadd (_ bv8 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_4|))) (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_8|)) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_BEFORE_CALL_4|) .cse1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_60|)))))) is different from false [2021-11-20 23:33:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-11-20 23:33:58,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [600106598] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:33:58,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795305639] [2021-11-20 23:33:58,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:58,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:33:58,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:33:58,401 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:33:58,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 23:33:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:58,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 23:33:58,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:58,504 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 23:33:58,838 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:33:58,838 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 23:33:58,849 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:33:58,850 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 23:33:58,925 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 23:33:58,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:34:10,231 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 23:34:10,638 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 23:34:10,638 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 23:34:12,896 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 23:34:12,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795305639] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:34:12,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:34:12,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 21 [2021-11-20 23:34:12,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174398026] [2021-11-20 23:34:12,897 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:34:12,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 23:34:12,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:34:12,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 23:34:12,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=230, Unknown=9, NotChecked=170, Total=462 [2021-11-20 23:34:12,899 INFO L87 Difference]: Start difference. First operand 133 states and 145 transitions. Second operand has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 16 states have internal predecessors, (62), 3 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 23:34:16,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:34:16,018 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2021-11-20 23:34:16,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 23:34:16,019 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 16 states have internal predecessors, (62), 3 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 26 [2021-11-20 23:34:16,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:34:16,021 INFO L225 Difference]: With dead ends: 133 [2021-11-20 23:34:16,021 INFO L226 Difference]: Without dead ends: 133 [2021-11-20 23:34:16,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 127 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=67, Invalid=286, Unknown=9, NotChecked=190, Total=552 [2021-11-20 23:34:16,023 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 4 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1054 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:34:16,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 845 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 360 Invalid, 0 Unknown, 1054 Unchecked, 1.0s Time] [2021-11-20 23:34:16,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-20 23:34:16,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-11-20 23:34:16,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 72 states have (on average 1.8888888888888888) internal successors, (136), 127 states have internal predecessors, (136), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:34:16,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 144 transitions. [2021-11-20 23:34:16,032 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 144 transitions. Word has length 26 [2021-11-20 23:34:16,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:34:16,033 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 144 transitions. [2021-11-20 23:34:16,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 16 states have internal predecessors, (62), 3 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 23:34:16,033 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 144 transitions. [2021-11-20 23:34:16,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 23:34:16,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:34:16,034 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 23:34:16,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-20 23:34:16,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 23:34:16,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-20 23:34:16,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:34:16,650 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 60 more)] === [2021-11-20 23:34:16,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:34:16,651 INFO L85 PathProgramCache]: Analyzing trace with hash -619542825, now seen corresponding path program 1 times [2021-11-20 23:34:16,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:34:16,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2122825844] [2021-11-20 23:34:16,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:16,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:34:16,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:34:16,652 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:34:16,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 23:34:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:16,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:34:16,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:34:16,860 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 23:34:16,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:34:16,981 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 23:34:16,981 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:34:16,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2122825844] [2021-11-20 23:34:16,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2122825844] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:34:16,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [797008109] [2021-11-20 23:34:16,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:16,982 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:34:16,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:34:16,985 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:34:17,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-20 23:34:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:17,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:34:17,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:34:17,207 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 23:34:17,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:34:17,334 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 23:34:17,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [797008109] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:34:17,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838690859] [2021-11-20 23:34:17,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:17,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:34:17,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:34:17,336 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:34:17,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 23:34:17,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:17,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:34:17,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:34:17,463 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 23:34:17,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:34:17,554 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 23:34:17,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838690859] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:34:17,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:34:17,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 6 [2021-11-20 23:34:17,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735577040] [2021-11-20 23:34:17,555 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:34:17,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:34:17,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:34:17,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:34:17,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:34:17,556 INFO L87 Difference]: Start difference. First operand 133 states and 144 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 23:34:17,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:34:17,788 INFO L93 Difference]: Finished difference Result 134 states and 144 transitions. [2021-11-20 23:34:17,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:34:17,789 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 23:34:17,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:34:17,790 INFO L225 Difference]: With dead ends: 134 [2021-11-20 23:34:17,791 INFO L226 Difference]: Without dead ends: 134 [2021-11-20 23:34:17,791 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 23:34:17,792 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 4 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 624 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 23:34:17,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 624 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:34:17,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-20 23:34:17,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-11-20 23:34:17,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 72 states have (on average 1.875) internal successors, (135), 127 states have internal predecessors, (135), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:34:17,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2021-11-20 23:34:17,800 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 28 [2021-11-20 23:34:17,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:34:17,801 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2021-11-20 23:34:17,801 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 23:34:17,801 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2021-11-20 23:34:17,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 23:34:17,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:34:17,802 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 23:34:17,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-20 23:34:18,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 23:34:18,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-20 23:34:18,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:34:18,405 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 60 more)] === [2021-11-20 23:34:18,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:34:18,406 INFO L85 PathProgramCache]: Analyzing trace with hash -2030739054, now seen corresponding path program 1 times [2021-11-20 23:34:18,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:34:18,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1559445902] [2021-11-20 23:34:18,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:18,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:34:18,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:34:18,407 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:34:18,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 23:34:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:18,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:34:18,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:34:18,594 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 23:34:18,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:34:18,632 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 23:34:18,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 23:34:18,696 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 23:34:18,696 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:34:18,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1559445902] [2021-11-20 23:34:18,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1559445902] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:34:18,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [943939487] [2021-11-20 23:34:18,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:18,697 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:34:18,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:34:18,700 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:34:18,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-20 23:34:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:18,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 23:34:18,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:34:18,965 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 23:34:18,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:34:18,993 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 23:34:18,993 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 23:34:19,060 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 23:34:19,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [943939487] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:34:19,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595462855] [2021-11-20 23:34:19,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:19,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:34:19,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:34:19,061 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:34:19,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 23:34:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:19,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:34:19,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:34:19,186 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 23:34:19,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:34:19,222 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 23:34:19,222 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 23:34:19,283 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 23:34:19,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595462855] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:34:19,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:34:19,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2021-11-20 23:34:19,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919482429] [2021-11-20 23:34:19,283 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:34:19,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:34:19,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:34:19,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:34:19,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:34:19,285 INFO L87 Difference]: Start difference. First operand 133 states and 143 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 23:34:19,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:34:19,561 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2021-11-20 23:34:19,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:34:19,562 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 23:34:19,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:34:19,563 INFO L225 Difference]: With dead ends: 138 [2021-11-20 23:34:19,563 INFO L226 Difference]: Without dead ends: 138 [2021-11-20 23:34:19,563 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 23:34:19,564 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 9 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:34:19,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 320 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:34:19,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-20 23:34:19,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2021-11-20 23:34:19,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 75 states have (on average 1.8666666666666667) internal successors, (140), 130 states have internal predecessors, (140), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:34:19,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 148 transitions. [2021-11-20 23:34:19,571 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 148 transitions. Word has length 29 [2021-11-20 23:34:19,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:34:19,571 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 148 transitions. [2021-11-20 23:34:19,572 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 23:34:19,572 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 148 transitions. [2021-11-20 23:34:19,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 23:34:19,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:34:19,573 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 23:34:19,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 23:34:19,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 23:34:19,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-20 23:34:20,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 23:34:20,188 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 60 more)] === [2021-11-20 23:34:20,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:34:20,188 INFO L85 PathProgramCache]: Analyzing trace with hash -2030739053, now seen corresponding path program 1 times [2021-11-20 23:34:20,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:34:20,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058434505] [2021-11-20 23:34:20,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:20,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:34:20,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:34:20,190 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:34:20,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 23:34:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:20,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 23:34:20,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:34:20,535 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 23:34:20,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:34:20,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:34:20,642 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 23:34:21,241 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 23:34:21,242 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:34:21,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058434505] [2021-11-20 23:34:21,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058434505] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:34:21,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [810771875] [2021-11-20 23:34:21,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:21,242 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:34:21,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:34:21,256 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:34:21,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-20 23:34:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:21,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 23:34:21,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:34:21,529 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 23:34:21,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:34:21,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:34:21,587 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 23:34:21,945 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 23:34:21,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [810771875] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:34:21,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248823886] [2021-11-20 23:34:21,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:21,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:34:21,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:34:21,947 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:34:21,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 23:34:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:22,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 23:34:22,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:34:22,153 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 23:34:22,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:34:22,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:34:22,206 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 23:34:22,551 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 23:34:22,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248823886] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:34:22,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:34:22,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2021-11-20 23:34:22,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830473126] [2021-11-20 23:34:22,551 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:34:22,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 23:34:22,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:34:22,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 23:34:22,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-20 23:34:22,553 INFO L87 Difference]: Start difference. First operand 136 states and 148 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 23:34:23,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:34:23,635 INFO L93 Difference]: Finished difference Result 143 states and 156 transitions. [2021-11-20 23:34:23,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 23:34:23,636 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 23:34:23,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:34:23,638 INFO L225 Difference]: With dead ends: 143 [2021-11-20 23:34:23,638 INFO L226 Difference]: Without dead ends: 143 [2021-11-20 23:34:23,638 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 23:34:23,638 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 22 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:34:23,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1197 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 23:34:23,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-20 23:34:23,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2021-11-20 23:34:23,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 75 states have (on average 1.8533333333333333) internal successors, (139), 130 states have internal predecessors, (139), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:34:23,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2021-11-20 23:34:23,645 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 29 [2021-11-20 23:34:23,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:34:23,645 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2021-11-20 23:34:23,645 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 23:34:23,645 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2021-11-20 23:34:23,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 23:34:23,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:34:23,647 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 23:34:23,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-20 23:34:23,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-20 23:34:24,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 23:34:24,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:34:24,249 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 60 more)] === [2021-11-20 23:34:24,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:34:24,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1471598771, now seen corresponding path program 1 times [2021-11-20 23:34:24,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:34:24,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104330601] [2021-11-20 23:34:24,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:24,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:34:24,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:34:24,251 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:34:24,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-20 23:34:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:24,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:34:24,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:34:24,358 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 23:34:24,481 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 23:34:24,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:34:24,634 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 23:34:24,634 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:34:24,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104330601] [2021-11-20 23:34:24,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104330601] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:34:24,635 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:34:24,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-20 23:34:24,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144056535] [2021-11-20 23:34:24,635 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:34:24,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:34:24,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:34:24,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:34:24,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:34:24,637 INFO L87 Difference]: Start difference. First operand 136 states and 147 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 23:34:25,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:34:25,412 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2021-11-20 23:34:25,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:34:25,413 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 23:34:25,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:34:25,414 INFO L225 Difference]: With dead ends: 136 [2021-11-20 23:34:25,414 INFO L226 Difference]: Without dead ends: 136 [2021-11-20 23:34:25,415 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 23:34:25,415 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 22 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:34:25,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 436 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 23:34:25,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-20 23:34:25,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2021-11-20 23:34:25,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 75 states have (on average 1.84) internal successors, (138), 129 states have internal predecessors, (138), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:34:25,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 146 transitions. [2021-11-20 23:34:25,421 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 146 transitions. Word has length 30 [2021-11-20 23:34:25,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:34:25,422 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 146 transitions. [2021-11-20 23:34:25,422 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 23:34:25,422 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 146 transitions. [2021-11-20 23:34:25,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 23:34:25,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:34:25,423 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 23:34:25,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-20 23:34:25,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:34:25,635 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 60 more)] === [2021-11-20 23:34:25,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:34:25,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1471598772, now seen corresponding path program 1 times [2021-11-20 23:34:25,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:34:25,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632324902] [2021-11-20 23:34:25,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:25,636 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:34:25,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:34:25,637 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:34:25,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-20 23:34:25,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:25,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 23:34:25,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:34:25,759 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 23:34:25,924 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 23:34:25,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:34:26,466 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 23:34:26,466 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:34:26,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632324902] [2021-11-20 23:34:26,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632324902] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:34:26,467 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:34:26,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-20 23:34:26,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942637088] [2021-11-20 23:34:26,467 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:34:26,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 23:34:26,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:34:26,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 23:34:26,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-20 23:34:26,469 INFO L87 Difference]: Start difference. First operand 135 states and 146 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 23:34:28,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:34:28,488 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2021-11-20 23:34:28,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:34:28,489 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 23:34:28,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:34:28,491 INFO L225 Difference]: With dead ends: 135 [2021-11-20 23:34:28,491 INFO L226 Difference]: Without dead ends: 135 [2021-11-20 23:34:28,491 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 23:34:28,492 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 22 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:34:28,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 667 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 23:34:28,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-20 23:34:28,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2021-11-20 23:34:28,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 75 states have (on average 1.8266666666666667) internal successors, (137), 128 states have internal predecessors, (137), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:34:28,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 145 transitions. [2021-11-20 23:34:28,497 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 145 transitions. Word has length 30 [2021-11-20 23:34:28,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:34:28,498 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 145 transitions. [2021-11-20 23:34:28,498 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 23:34:28,498 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 145 transitions. [2021-11-20 23:34:28,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 23:34:28,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:34:28,499 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:34:28,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-20 23:34:28,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:34:28,711 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 60 more)] === [2021-11-20 23:34:28,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:34:28,711 INFO L85 PathProgramCache]: Analyzing trace with hash 939320083, now seen corresponding path program 1 times [2021-11-20 23:34:28,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:34:28,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766437371] [2021-11-20 23:34:28,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:28,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:34:28,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:34:28,715 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:34:28,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-20 23:34:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:28,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:34:28,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:34:28,950 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:34:28,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:34:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 23:34:29,080 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:34:29,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766437371] [2021-11-20 23:34:29,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766437371] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:34:29,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [889119526] [2021-11-20 23:34:29,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:29,081 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:34:29,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:34:29,081 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:34:29,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-20 23:34:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:29,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:34:29,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:34:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:34:29,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:34:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 23:34:29,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [889119526] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:34:29,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083863102] [2021-11-20 23:34:29,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:29,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:34:29,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:34:29,412 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:34:29,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 23:34:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:29,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:34:29,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:34:29,604 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:34:29,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:34:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 23:34:29,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083863102] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:34:29,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:34:29,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-20 23:34:29,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52085331] [2021-11-20 23:34:29,695 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:34:29,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:34:29,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:34:29,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:34:29,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:34:29,696 INFO L87 Difference]: Start difference. First operand 134 states and 145 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 23:34:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:34:29,720 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2021-11-20 23:34:29,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:34:29,721 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-11-20 23:34:29,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:34:29,722 INFO L225 Difference]: With dead ends: 122 [2021-11-20 23:34:29,722 INFO L226 Difference]: Without dead ends: 122 [2021-11-20 23:34:29,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:34:29,723 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 107 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:34:29,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 275 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:34:29,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-20 23:34:29,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-20 23:34:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 68 states have (on average 1.8088235294117647) internal successors, (123), 117 states have internal predecessors, (123), 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 23:34:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 129 transitions. [2021-11-20 23:34:29,728 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 129 transitions. Word has length 41 [2021-11-20 23:34:29,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:34:29,729 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 129 transitions. [2021-11-20 23:34:29,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 23:34:29,729 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 129 transitions. [2021-11-20 23:34:29,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 23:34:29,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:34:29,730 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:34:29,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-20 23:34:29,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-11-20 23:34:30,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-20 23:34:30,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:34:30,336 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 60 more)] === [2021-11-20 23:34:30,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:34:30,336 INFO L85 PathProgramCache]: Analyzing trace with hash -566913869, now seen corresponding path program 1 times [2021-11-20 23:34:30,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:34:30,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034737841] [2021-11-20 23:34:30,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:30,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:34:30,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:34:30,338 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:34:30,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-20 23:34:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:30,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 23:34:30,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:34:30,532 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 23:34:30,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-11-20 23:34:30,728 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 23:34:30,728 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 24 treesize of output 31 [2021-11-20 23:34:30,844 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:34:30,844 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 35 treesize of output 31 [2021-11-20 23:34:31,043 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-20 23:34:31,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 62 [2021-11-20 23:34:32,049 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-20 23:34:32,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 64 [2021-11-20 23:34:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:34:32,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:35:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 7 refuted. 16 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:13,268 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:35:13,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034737841] [2021-11-20 23:35:13,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034737841] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:35:13,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1611268718] [2021-11-20 23:35:13,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:13,269 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:35:13,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:35:13,269 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:35:13,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-20 23:35:13,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:13,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 23:35:13,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:35:13,621 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-20 23:35:13,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 19 [2021-11-20 23:35:13,755 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:35:13,755 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 17 [2021-11-20 23:35:14,027 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-20 23:35:14,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 37 [2021-11-20 23:35:14,379 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:35:14,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-11-20 23:35:22,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:35:22,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:35:22,899 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-11-20 23:35:22,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 60 [2021-11-20 23:35:24,364 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:35:24,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 41 [2021-11-20 23:35:24,660 INFO L354 Elim1Store]: treesize reduction 57, result has 30.5 percent of original size [2021-11-20 23:35:24,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 58 treesize of output 75 [2021-11-20 23:35:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:35:25,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:35:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 23:35:31,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1611268718] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:35:31,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:35:31,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10, 12] total 30 [2021-11-20 23:35:31,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88083757] [2021-11-20 23:35:31,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:31,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:35:31,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:35:31,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:35:31,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=756, Unknown=21, NotChecked=0, Total=930 [2021-11-20 23:35:31,808 INFO L87 Difference]: Start difference. First operand 122 states and 129 transitions. Second operand has 7 states, 5 states have (on average 6.0) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 23:35:32,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:32,115 INFO L93 Difference]: Finished difference Result 135 states and 143 transitions. [2021-11-20 23:35:32,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:35:32,116 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 6.0) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2021-11-20 23:35:32,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:32,117 INFO L225 Difference]: With dead ends: 135 [2021-11-20 23:35:32,117 INFO L226 Difference]: Without dead ends: 135 [2021-11-20 23:35:32,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 125 SyntacticMatches, 14 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 52.8s TimeCoverageRelationStatistics Valid=153, Invalid=756, Unknown=21, NotChecked=0, Total=930 [2021-11-20 23:35:32,118 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 93 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:32,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 202 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 173 Unchecked, 0.3s Time] [2021-11-20 23:35:32,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-20 23:35:32,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 117. [2021-11-20 23:35:32,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 68 states have (on average 1.7352941176470589) internal successors, (118), 112 states have internal predecessors, (118), 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 23:35:32,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2021-11-20 23:35:32,123 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 43 [2021-11-20 23:35:32,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:32,123 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2021-11-20 23:35:32,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 6.0) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 23:35:32,124 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2021-11-20 23:35:32,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 23:35:32,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:32,125 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:32,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-20 23:35:32,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-20 23:35:32,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 23:35:32,526 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 60 more)] === [2021-11-20 23:35:32,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:32,526 INFO L85 PathProgramCache]: Analyzing trace with hash -566913868, now seen corresponding path program 1 times [2021-11-20 23:35:32,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:35:32,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048973069] [2021-11-20 23:35:32,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:32,527 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:35:32,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:35:32,527 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:35:32,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-20 23:35:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:32,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 23:35:32,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:35:32,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:35:32,780 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 23:35:32,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2021-11-20 23:35:32,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-20 23:35:33,179 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:35:33,180 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 28 treesize of output 30 [2021-11-20 23:35:33,191 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:35:33,191 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 27 treesize of output 23 [2021-11-20 23:35:33,391 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:35:33,391 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 14 treesize of output 14 [2021-11-20 23:35:33,693 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 23:35:33,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2021-11-20 23:35:34,847 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-20 23:35:34,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 32 [2021-11-20 23:35:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:35,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:35:44,652 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_204| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_append_~head#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_append_~head#1.base_BEFORE_CALL_6| (_ BitVec 32))) (let ((.cse0 (bvadd |v_ULTIMATE.start_dll_circular_append_~head#1.offset_BEFORE_CALL_2| (_ bv4 32)))) (or (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_204| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_append_~head#1.base_BEFORE_CALL_6|)) (not (bvule |v_ULTIMATE.start_dll_circular_append_~head#1.offset_BEFORE_CALL_2| .cse0)) (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd |v_ULTIMATE.start_dll_circular_append_~head#1.offset_BEFORE_CALL_2| (_ bv4 32)) (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_append_~head#1.base_BEFORE_CALL_6|))))))) is different from false [2021-11-20 23:35:47,900 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (_ BitVec 32))) (or (and (forall ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store |c_#length| |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|))) (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|))) (exists ((|v_node_create_~temp~0#1.base_207| (_ BitVec 32))) (and (or (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_207| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|)))) (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|)))) (bvult |v_node_create_~temp~0#1.base_207| |c_#StackHeapBarrier|))))) is different from false [2021-11-20 23:37:00,640 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_212| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_207| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_212|)))) (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|)) (forall ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|) (select (store (store (store |c_#length| |v_node_create_~temp~0#1.base_212| (_ bv12 32)) |v_node_create_~temp~0#1.base_207| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12|)))) (exists ((|v_node_create_~temp~0#1.base_207| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_211| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_207| |c_#StackHeapBarrier|) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|))) (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|) (select (store (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_211| (_ bv12 32)) |v_node_create_~temp~0#1.base_207| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12|))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_211|))))) (not (bvult |v_node_create_~temp~0#1.base_207| |c_#StackHeapBarrier|)))) is different from true [2021-11-20 23:37:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 7 times theorem prover too weak. 0 trivial. 17 not checked. [2021-11-20 23:37:00,652 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:37:00,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048973069] [2021-11-20 23:37:00,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048973069] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:37:00,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [413709753] [2021-11-20 23:37:00,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:00,653 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:37:00,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:37:00,654 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:37:00,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-20 23:37:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:00,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 23:37:00,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:00,928 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 23:37:02,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-20 23:37:02,414 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:37:02,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 17 [2021-11-20 23:37:02,786 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:37:02,786 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 17 treesize of output 13 [2021-11-20 23:37:09,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:09,410 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-20 23:37:09,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 25 [2021-11-20 23:37:13,007 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:37:13,008 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 17 treesize of output 13 [2021-11-20 23:37:13,286 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 23:37:13,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 37 [2021-11-20 23:37:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:37:13,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:39:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 0 refuted. 17 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:39:56,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [413709753] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:39:56,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018278454] [2021-11-20 23:39:56,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:39:56,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:39:56,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:39:56,884 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:39:56,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1c5f3d-2b83-4bc8-9492-ec7fdb0be7f6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-20 23:39:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:39:56,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 23:39:56,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:39:56,999 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 23:39:57,016 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 23:40:03,891 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 23:40:03,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-20 23:40:03,970 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 23:40:03,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-11-20 23:40:10,869 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 23:40:10,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 62 [2021-11-20 23:40:10,930 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 23:40:10,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 30 [2021-11-20 23:40:13,784 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-20 23:40:13,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 46 [2021-11-20 23:40:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:40:18,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:40:20,908 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_append_~head#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_append_~head#1.base_BEFORE_CALL_10| (_ BitVec 32))) (let ((.cse0 (bvadd |v_ULTIMATE.start_dll_circular_append_~head#1.offset_BEFORE_CALL_6| (_ bv4 32)))) (or (bvule .cse0 (select |c_#length| |v_ULTIMATE.start_dll_circular_append_~head#1.base_BEFORE_CALL_10|)) (not (bvule |v_ULTIMATE.start_dll_circular_append_~head#1.offset_BEFORE_CALL_6| .cse0)) (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd |v_ULTIMATE.start_dll_circular_append_~head#1.offset_BEFORE_CALL_6| (_ bv4 32)) (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_append_~head#1.base_BEFORE_CALL_10|))))))) is different from false [2021-11-20 23:40:23,427 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_append_~head#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_229| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_append_~head#1.base_BEFORE_CALL_10| (_ BitVec 32))) (let ((.cse0 (bvadd |v_ULTIMATE.start_dll_circular_append_~head#1.offset_BEFORE_CALL_6| (_ bv4 32)))) (or (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_229| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_append_~head#1.base_BEFORE_CALL_10|)) (not (bvule |v_ULTIMATE.start_dll_circular_append_~head#1.offset_BEFORE_CALL_6| .cse0)) (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd |v_ULTIMATE.start_dll_circular_append_~head#1.offset_BEFORE_CALL_6| (_ bv4 32)) (select (store |c_old(#length)| |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_append_~head#1.base_BEFORE_CALL_10|))))))) is different from false [2021-11-20 23:40:46,140 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|) (select (store (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))))))) (and (forall ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|) (select (store |c_#length| |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))) (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))))) is different from false [2021-11-20 23:40:48,142 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|) (select (store (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))))))) (and (forall ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|) (select (store |c_#length| |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))) (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))))) is different from true [2021-11-20 23:40:53,301 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_233| (_ BitVec 32))) (or (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|)) (forall ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|) (select (store (store |c_#length| |v_node_create_~temp~0#1.base_233| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|)))) (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|) (select (store (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_233|)))))) is different from false [2021-11-20 23:40:55,303 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_233| (_ BitVec 32))) (or (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|)) (forall ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|) (select (store (store |c_#length| |v_node_create_~temp~0#1.base_233| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|)))) (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|) (select (store (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_233|)))))) is different from true [2021-11-20 23:41:04,961 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_#t~ret4#1.base_94| (_ BitVec 32))) (and (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|))) (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|) (select (store (store (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret4#1.base_94| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret4#1.base_94| (_ bv1 1)) |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108|)))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret4#1.base_94|)))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108|)))) (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|)) (forall ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|) (select (store (store |c_#length| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20|)))))) is different from false [2021-11-20 23:43:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 24 not checked. [2021-11-20 23:43:10,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018278454] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:43:10,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:43:10,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 10, 16, 13] total 61 [2021-11-20 23:43:10,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848863835] [2021-11-20 23:43:10,001 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:43:10,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-20 23:43:10,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:43:10,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-20 23:43:10,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=2408, Unknown=134, NotChecked=888, Total=3782 [2021-11-20 23:43:10,005 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand has 62 states, 52 states have (on average 3.519230769230769) internal successors, (183), 45 states have internal predecessors, (183), 16 states have call successors, (18), 14 states have call predecessors, (18), 15 states have return successors, (18), 14 states have call predecessors, (18), 16 states have call successors, (18) [2021-11-20 23:43:12,206 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_207| (_ BitVec 32))) (or (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|)) (forall ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|) (select (store (store |c_#length| |v_node_create_~temp~0#1.base_207| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12|)))) (exists ((|v_node_create_~temp~0#1.base_207| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_211| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_207| |c_#StackHeapBarrier|) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|))) (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|) (select (store (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_211| (_ bv12 32)) |v_node_create_~temp~0#1.base_207| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12|))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_211|))))) (not (bvult |v_node_create_~temp~0#1.base_207| |c_#StackHeapBarrier|)))) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv12 32))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |node_create_~temp~0#1.base|))))) (= |c_#length| (store |c_old(#length)| |c_node_create_~temp~0#1.base| (_ bv12 32))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |c_node_create_~temp~0#1.base|)))) (forall ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (_ BitVec 32))) (or (and (forall ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store |c_#length| |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|))) (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|))) (exists ((|v_node_create_~temp~0#1.base_207| (_ BitVec 32))) (and (or (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_207| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|)))) (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|)))) (bvult |v_node_create_~temp~0#1.base_207| |c_#StackHeapBarrier|))))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv12 32))) (bvult |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) (= (store |c_old(#valid)| |c_node_create_~temp~0#1.base| (_ bv1 1)) |c_#valid|)) is different from false [2021-11-20 23:43:14,238 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_207| (_ BitVec 32))) (or (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|)) (forall ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|) (select (store (store |c_#length| |v_node_create_~temp~0#1.base_207| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12|)))) (exists ((|v_node_create_~temp~0#1.base_207| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_211| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_207| |c_#StackHeapBarrier|) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|))) (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|) (select (store (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_211| (_ bv12 32)) |v_node_create_~temp~0#1.base_207| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12|))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_211|))))) (not (bvult |v_node_create_~temp~0#1.base_207| |c_#StackHeapBarrier|)))) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv12 32))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |node_create_~temp~0#1.base|))))) (= |c_#length| (store |c_old(#length)| |c_node_create_~temp~0#1.base| (_ bv12 32))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |c_node_create_~temp~0#1.base|)))) (forall ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (_ BitVec 32))) (or (and (forall ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store |c_#length| |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|))) (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|))) (exists ((|v_node_create_~temp~0#1.base_207| (_ BitVec 32))) (and (or (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_207| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|)))) (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|)))) (bvult |v_node_create_~temp~0#1.base_207| |c_#StackHeapBarrier|))))) (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_#t~ret4#1.base_94| (_ BitVec 32))) (and (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|))) (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|) (select (store (store (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret4#1.base_94| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret4#1.base_94| (_ bv1 1)) |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108|)))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret4#1.base_94|)))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108|)))) (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|)) (forall ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|) (select (store (store |c_#length| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20|)))))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv12 32))) (bvult |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) (= (store |c_old(#valid)| |c_node_create_~temp~0#1.base| (_ bv1 1)) |c_#valid|)) is different from false [2021-11-20 23:43:16,284 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))) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv12 32))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |node_create_~temp~0#1.base|))))) (= (store |c_old(#valid)| |c_node_create_#res#1.base| (_ bv1 1)) |c_#valid|) (forall ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (_ BitVec 32))) (or (and (forall ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store |c_#length| |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|))) (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|))) (exists ((|v_node_create_~temp~0#1.base_207| (_ BitVec 32))) (and (or (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_207| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|)))) (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|)))) (bvult |v_node_create_~temp~0#1.base_207| |c_#StackHeapBarrier|))))) (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_#t~ret4#1.base_94| (_ BitVec 32))) (and (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|))) (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|) (select (store (store (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret4#1.base_94| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret4#1.base_94| (_ bv1 1)) |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108|)))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret4#1.base_94|)))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108|)))) (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|)) (forall ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|) (select (store (store |c_#length| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20|)))))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv12 32))) (bvult |node_create_~temp~0#1.base| |c_#StackHeapBarrier|)))) is different from false [2021-11-20 23:44:32,519 WARN L227 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 50 DAG size of output: 15 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:45:09,786 WARN L227 SmtUtils]: Spent 8.40s on a formula simplification. DAG size of input: 76 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:45:11,851 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_207| (_ BitVec 32))) (or (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|)) (forall ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|) (select (store (store |c_#length| |v_node_create_~temp~0#1.base_207| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12|)))) (exists ((|v_node_create_~temp~0#1.base_207| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_211| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_207| |c_#StackHeapBarrier|) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|))) (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|) (select (store (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_211| (_ bv12 32)) |v_node_create_~temp~0#1.base_207| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12|))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_211|))))) (not (bvult |v_node_create_~temp~0#1.base_207| |c_#StackHeapBarrier|)))) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv12 32))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |node_create_~temp~0#1.base|))))) (= |c_#length| (store |c_old(#length)| |c_node_create_~temp~0#1.base| (_ bv12 32))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |c_node_create_~temp~0#1.base|)))) (forall ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (_ BitVec 32))) (or (and (forall ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store |c_#length| |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|))) (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|))) (exists ((|v_node_create_~temp~0#1.base_207| (_ BitVec 32))) (and (or (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_207| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|)))) (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|)))) (bvult |v_node_create_~temp~0#1.base_207| |c_#StackHeapBarrier|))))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (bvult |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (= (store |c_old(#valid)| |c_node_create_~temp~0#1.base| (_ bv1 1)) |c_#valid|) (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|) (select (store (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))))))) (and (forall ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|) (select (store |c_#length| |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))) (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|)))))) is different from false [2021-11-20 23:45:13,882 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_207| (_ BitVec 32))) (or (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|)) (forall ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|) (select (store (store |c_#length| |v_node_create_~temp~0#1.base_207| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12|)))) (exists ((|v_node_create_~temp~0#1.base_207| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_211| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_207| |c_#StackHeapBarrier|) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|))) (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_4|) (select (store (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_211| (_ bv12 32)) |v_node_create_~temp~0#1.base_207| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_12|))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_node_create_~temp~0#1.base_211|))))) (not (bvult |v_node_create_~temp~0#1.base_207| |c_#StackHeapBarrier|)))) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv12 32))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |node_create_~temp~0#1.base|))))) (= |c_#length| (store |c_old(#length)| |c_node_create_~temp~0#1.base| (_ bv12 32))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |c_node_create_~temp~0#1.base|)))) (forall ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (_ BitVec 32))) (or (and (forall ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store |c_#length| |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|))) (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|))) (exists ((|v_node_create_~temp~0#1.base_207| (_ BitVec 32))) (and (or (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_207| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|)))) (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|)))) (bvult |v_node_create_~temp~0#1.base_207| |c_#StackHeapBarrier|))))) (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_#t~ret4#1.base_94| (_ BitVec 32))) (and (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|))) (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|) (select (store (store (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret4#1.base_94| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret4#1.base_94| (_ bv1 1)) |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108|)))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret4#1.base_94|)))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108|)))) (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|)) (forall ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|) (select (store (store |c_#length| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20|)))))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (bvult |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (= (store |c_old(#valid)| |c_node_create_~temp~0#1.base| (_ bv1 1)) |c_#valid|) (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|) (select (store (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))))))) (and (forall ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|) (select (store |c_#length| |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))) (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|)))))) is different from false [2021-11-20 23:45:15,941 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))) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv12 32))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |node_create_~temp~0#1.base|))))) (= (store |c_old(#valid)| |c_node_create_#res#1.base| (_ bv1 1)) |c_#valid|) (forall ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (_ BitVec 32))) (or (and (forall ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store |c_#length| |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|))) (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|))) (exists ((|v_node_create_~temp~0#1.base_207| (_ BitVec 32))) (and (or (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|) (select (store (store |c_old(#length)| |v_node_create_~temp~0#1.base_207| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|)))) (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_3|)))) (bvult |v_node_create_~temp~0#1.base_207| |c_#StackHeapBarrier|))))) (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_create_#t~ret4#1.base_94| (_ BitVec 32))) (and (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|))) (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|) (select (store (store (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret4#1.base_94| (_ bv12 32)) |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret4#1.base_94| (_ bv1 1)) |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108|)))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret4#1.base_94|)))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108|)))) (and (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|)) (forall ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_12|) (select (store (store |c_#length| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_20|)))))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (bvult |c_node_create_#res#1.base| |c_#StackHeapBarrier|) (forall ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19| (_ BitVec 32))) (or (exists ((|v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108|))) (or (not (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|))) (exists ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|) (select (store (store |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_#t~ret5#1.base_108| (_ bv12 32)) |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))))))) (and (forall ((|v_node_create_~temp~0#1.base_203| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|) (select (store |c_#length| |v_node_create_~temp~0#1.base_203| (_ bv12 32)) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_19|))) (bvule |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11| (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_11|)))))) is different from false