./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:51:54,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:51:54,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:51:54,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:51:54,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:51:54,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:51:54,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:51:54,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:51:54,231 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:51:54,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:51:54,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:51:54,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:51:54,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:51:54,238 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:51:54,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:51:54,242 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:51:54,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:51:54,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:51:54,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:51:54,251 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:51:54,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:51:54,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:51:54,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:51:54,259 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:51:54,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:51:54,264 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:51:54,265 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:51:54,266 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:51:54,267 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:51:54,268 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:51:54,269 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:51:54,270 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:51:54,271 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:51:54,277 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:51:54,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:51:54,280 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:51:54,282 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:51:54,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:51:54,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:51:54,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:51:54,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:51:54,287 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:51:54,340 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:51:54,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:51:54,341 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:51:54,341 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:51:54,343 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:51:54,343 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:51:54,343 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:51:54,344 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:51:54,344 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:51:54,344 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:51:54,345 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:51:54,346 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:51:54,346 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:51:54,346 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:51:54,346 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:51:54,347 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:51:54,347 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:51:54,347 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:51:54,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:51:54,349 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:51:54,350 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:51:54,350 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:51:54,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:51:54,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:51:54,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:51:54,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:51:54,353 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:51:54,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:51:54,353 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:51:54,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:51:54,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:51:54,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:51:54,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:51:54,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:51:54,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:51:54,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:51:54,356 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:51:54,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:51:54,356 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:51:54,356 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:51:54,357 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:51:54,357 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_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 [2021-11-23 03:51:54,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:51:54,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:51:54,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:51:54,686 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:51:54,687 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:51:54,688 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-11-23 03:51:54,771 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/data/24db75e0d/7797fc5513b940bcbd796fe87c0e9193/FLAGf7e63a4a8 [2021-11-23 03:51:55,459 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:51:55,460 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-11-23 03:51:55,485 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/data/24db75e0d/7797fc5513b940bcbd796fe87c0e9193/FLAGf7e63a4a8 [2021-11-23 03:51:55,682 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/data/24db75e0d/7797fc5513b940bcbd796fe87c0e9193 [2021-11-23 03:51:55,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:51:55,696 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:51:55,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:51:55,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:51:55,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:51:55,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:51:55" (1/1) ... [2021-11-23 03:51:55,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58bde47e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:55, skipping insertion in model container [2021-11-23 03:51:55,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:51:55" (1/1) ... [2021-11-23 03:51:55,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:51:55,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:51:56,113 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_e2db2845-077d-4b27-bb34-47e3047705ef/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-11-23 03:51:56,116 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:51:56,125 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:51:56,170 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_e2db2845-077d-4b27-bb34-47e3047705ef/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-11-23 03:51:56,171 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:51:56,204 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:51:56,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:56 WrapperNode [2021-11-23 03:51:56,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:51:56,206 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:51:56,206 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:51:56,206 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:51:56,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:56" (1/1) ... [2021-11-23 03:51:56,229 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:56" (1/1) ... [2021-11-23 03:51:56,256 INFO L137 Inliner]: procedures = 127, calls = 47, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 134 [2021-11-23 03:51:56,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:51:56,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:51:56,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:51:56,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:51:56,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:56" (1/1) ... [2021-11-23 03:51:56,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:56" (1/1) ... [2021-11-23 03:51:56,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:56" (1/1) ... [2021-11-23 03:51:56,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:56" (1/1) ... [2021-11-23 03:51:56,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:56" (1/1) ... [2021-11-23 03:51:56,284 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:56" (1/1) ... [2021-11-23 03:51:56,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:56" (1/1) ... [2021-11-23 03:51:56,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:51:56,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:51:56,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:51:56,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:51:56,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:56" (1/1) ... [2021-11-23 03:51:56,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:51:56,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:51:56,326 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:51:56,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:51:56,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:51:56,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:51:56,380 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-23 03:51:56,381 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-23 03:51:56,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:51:56,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:51:56,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:51:56,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:51:56,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:51:56,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:51:56,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:51:56,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:51:56,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:51:56,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:51:56,552 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:51:56,554 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:51:56,902 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:51:57,001 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:51:57,002 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 03:51:57,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:51:57 BoogieIcfgContainer [2021-11-23 03:51:57,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:51:57,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:51:57,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:51:57,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:51:57,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:51:55" (1/3) ... [2021-11-23 03:51:57,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d25bb94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:51:57, skipping insertion in model container [2021-11-23 03:51:57,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:56" (2/3) ... [2021-11-23 03:51:57,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d25bb94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:51:57, skipping insertion in model container [2021-11-23 03:51:57,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:51:57" (3/3) ... [2021-11-23 03:51:57,016 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_equal.i [2021-11-23 03:51:57,022 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:51:57,023 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:51:57,079 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:51:57,087 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-11-23 03:51:57,088 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:51:57,131 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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) [2021-11-23 03:51:57,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 03:51:57,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:57,137 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:57,138 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:51:57,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:57,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1264371919, now seen corresponding path program 1 times [2021-11-23 03:51:57,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:57,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349382362] [2021-11-23 03:51:57,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:57,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:51:57,463 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:57,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349382362] [2021-11-23 03:51:57,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349382362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:57,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:51:57,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:51:57,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639448834] [2021-11-23 03:51:57,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:57,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:51:57,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:57,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:51:57,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:51:57,519 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-23 03:51:57,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:57,679 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2021-11-23 03:51:57,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:51:57,682 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), 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 15 [2021-11-23 03:51:57,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:57,690 INFO L225 Difference]: With dead ends: 43 [2021-11-23 03:51:57,691 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 03:51:57,694 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 [2021-11-23 03:51:57,698 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:57,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 41 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:51:57,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 03:51:57,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-23 03:51:57,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2021-11-23 03:51:57,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-23 03:51:57,743 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2021-11-23 03:51:57,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:57,744 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-23 03:51:57,745 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), 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) [2021-11-23 03:51:57,745 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-23 03:51:57,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 03:51:57,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:57,747 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:57,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:51:57,748 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:51:57,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:57,749 INFO L85 PathProgramCache]: Analyzing trace with hash -336525961, now seen corresponding path program 1 times [2021-11-23 03:51:57,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:57,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452592456] [2021-11-23 03:51:57,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:57,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:59,395 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:59,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452592456] [2021-11-23 03:51:59,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452592456] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:51:59,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774609097] [2021-11-23 03:51:59,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:59,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:51:59,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:51:59,401 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:51:59,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:51:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:59,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-23 03:51:59,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:59,693 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 [2021-11-23 03:51:59,788 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 [2021-11-23 03:51:59,964 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 03:51:59,966 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 [2021-11-23 03:52:00,201 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:52:00,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:52:00,385 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:52:00,386 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 22 treesize of output 33 [2021-11-23 03:52:00,676 INFO L354 Elim1Store]: treesize reduction 45, result has 19.6 percent of original size [2021-11-23 03:52:00,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 46 [2021-11-23 03:52:00,881 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-23 03:52:00,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 44 [2021-11-23 03:52:00,899 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:52:00,900 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 35 treesize of output 29 [2021-11-23 03:52:01,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 03:52:01,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:01,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:01,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:01,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:01,297 INFO L354 Elim1Store]: treesize reduction 342, result has 5.8 percent of original size [2021-11-23 03:52:01,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 174 treesize of output 116 [2021-11-23 03:52:01,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:01,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:01,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:01,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:01,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 143 [2021-11-23 03:52:01,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:01,353 INFO L354 Elim1Store]: treesize reduction 68, result has 28.4 percent of original size [2021-11-23 03:52:01,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 152 treesize of output 152 [2021-11-23 03:52:01,798 INFO L354 Elim1Store]: treesize reduction 86, result has 1.1 percent of original size [2021-11-23 03:52:01,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 2628 treesize of output 1671 [2021-11-23 03:52:01,867 INFO L354 Elim1Store]: treesize reduction 124, result has 0.8 percent of original size [2021-11-23 03:52:01,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 3413 treesize of output 2229 [2021-11-23 03:52:02,415 INFO L354 Elim1Store]: treesize reduction 558, result has 6.4 percent of original size [2021-11-23 03:52:02,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 2394 treesize of output 2166 [2021-11-23 03:52:03,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-23 03:52:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:52:03,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:52:03,488 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-23 03:52:03,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [613054037] [2021-11-23 03:52:03,527 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:52:03,531 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:52:03,538 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:52:03,544 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:52:03,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:52:03,612 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6085a741 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:388) 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$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) 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:119) 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) [2021-11-23 03:52:03,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:52:03,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-23 03:52:03,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015539606] [2021-11-23 03:52:03,621 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 03:52:03,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:52:03,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:03,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:52:03,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 03:52:03,628 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 03:52:03,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 03:52:03,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 03:52:03,631 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:03,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:52:03,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:52:03,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:52:03,860 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6085a741 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.chooseFalseSuccessor2(BasicAbstractInterpolantAutomaton.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:73) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) 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) [2021-11-23 03:52:03,863 INFO L158 Benchmark]: Toolchain (without parser) took 8166.77ms. Allocated memory was 113.2MB in the beginning and 167.8MB in the end (delta: 54.5MB). Free memory was 70.4MB in the beginning and 67.7MB in the end (delta: 2.7MB). Peak memory consumption was 55.8MB. Max. memory is 16.1GB. [2021-11-23 03:52:03,864 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 113.2MB. Free memory is still 88.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:52:03,864 INFO L158 Benchmark]: CACSL2BoogieTranslator took 504.32ms. Allocated memory is still 113.2MB. Free memory was 70.3MB in the beginning and 79.1MB in the end (delta: -8.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-23 03:52:03,864 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.06ms. Allocated memory is still 113.2MB. Free memory was 79.1MB in the beginning and 76.7MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:52:03,865 INFO L158 Benchmark]: Boogie Preprocessor took 33.35ms. Allocated memory is still 113.2MB. Free memory was 76.7MB in the beginning and 74.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:52:03,865 INFO L158 Benchmark]: RCFGBuilder took 715.03ms. Allocated memory is still 113.2MB. Free memory was 74.9MB in the beginning and 53.9MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-23 03:52:03,866 INFO L158 Benchmark]: TraceAbstraction took 6853.83ms. Allocated memory was 113.2MB in the beginning and 167.8MB in the end (delta: 54.5MB). Free memory was 53.7MB in the beginning and 67.7MB in the end (delta: -14.1MB). Peak memory consumption was 43.0MB. Max. memory is 16.1GB. [2021-11-23 03:52:03,877 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 113.2MB. Free memory is still 88.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 504.32ms. Allocated memory is still 113.2MB. Free memory was 70.3MB in the beginning and 79.1MB in the end (delta: -8.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.06ms. Allocated memory is still 113.2MB. Free memory was 79.1MB in the beginning and 76.7MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.35ms. Allocated memory is still 113.2MB. Free memory was 76.7MB in the beginning and 74.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 715.03ms. Allocated memory is still 113.2MB. Free memory was 74.9MB in the beginning and 53.9MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 6853.83ms. Allocated memory was 113.2MB in the beginning and 167.8MB in the end (delta: 54.5MB). Free memory was 53.7MB in the beginning and 67.7MB in the end (delta: -14.1MB). Peak memory consumption was 43.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6085a741 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6085a741: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 03:52:03,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally 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_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:52:06,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:52:06,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:52:06,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:52:06,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:52:06,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:52:06,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:52:06,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:52:06,630 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:52:06,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:52:06,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:52:06,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:52:06,642 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:52:06,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:52:06,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:52:06,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:52:06,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:52:06,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:52:06,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:52:06,664 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:52:06,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:52:06,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:52:06,671 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:52:06,673 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:52:06,682 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:52:06,683 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:52:06,683 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:52:06,686 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:52:06,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:52:06,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:52:06,688 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:52:06,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:52:06,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:52:06,692 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:52:06,701 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:52:06,701 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:52:06,702 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:52:06,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:52:06,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:52:06,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:52:06,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:52:06,706 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 03:52:06,749 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:52:06,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:52:06,750 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:52:06,751 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:52:06,752 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:52:06,752 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:52:06,752 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:52:06,752 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:52:06,753 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:52:06,754 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:52:06,755 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:52:06,755 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:52:06,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:52:06,757 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:52:06,757 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:52:06,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:52:06,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:52:06,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:52:06,758 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:52:06,759 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:52:06,759 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 03:52:06,759 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 03:52:06,759 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:52:06,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:52:06,760 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:52:06,760 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:52:06,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:52:06,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 03:52:06,761 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:52:06,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:52:06,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:52:06,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:52:06,762 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:52:06,762 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 03:52:06,762 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 03:52:06,763 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:52:06,763 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:52:06,763 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:52:06,763 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_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 [2021-11-23 03:52:07,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:52:07,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:52:07,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:52:07,154 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:52:07,155 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:52:07,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-11-23 03:52:07,233 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/data/8973f9cfa/40b640e410c44c22a2a903ef36585736/FLAGcb5b19865 [2021-11-23 03:52:08,008 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:52:08,008 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-11-23 03:52:08,028 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/data/8973f9cfa/40b640e410c44c22a2a903ef36585736/FLAGcb5b19865 [2021-11-23 03:52:08,290 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/data/8973f9cfa/40b640e410c44c22a2a903ef36585736 [2021-11-23 03:52:08,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:52:08,297 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:52:08,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:52:08,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:52:08,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:52:08,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:52:08" (1/1) ... [2021-11-23 03:52:08,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6399ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:08, skipping insertion in model container [2021-11-23 03:52:08,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:52:08" (1/1) ... [2021-11-23 03:52:08,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:52:08,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:52:08,758 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_e2db2845-077d-4b27-bb34-47e3047705ef/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-11-23 03:52:08,761 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:52:08,783 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:52:08,876 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_e2db2845-077d-4b27-bb34-47e3047705ef/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-11-23 03:52:08,877 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:52:08,944 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:52:08,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:08 WrapperNode [2021-11-23 03:52:08,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:52:08,946 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:52:08,946 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:52:08,947 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:52:08,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:08" (1/1) ... [2021-11-23 03:52:08,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:08" (1/1) ... [2021-11-23 03:52:09,044 INFO L137 Inliner]: procedures = 130, calls = 47, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 135 [2021-11-23 03:52:09,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:52:09,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:52:09,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:52:09,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:52:09,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:08" (1/1) ... [2021-11-23 03:52:09,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:08" (1/1) ... [2021-11-23 03:52:09,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:08" (1/1) ... [2021-11-23 03:52:09,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:08" (1/1) ... [2021-11-23 03:52:09,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:08" (1/1) ... [2021-11-23 03:52:09,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:08" (1/1) ... [2021-11-23 03:52:09,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:08" (1/1) ... [2021-11-23 03:52:09,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:52:09,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:52:09,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:52:09,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:52:09,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:08" (1/1) ... [2021-11-23 03:52:09,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:52:09,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:52:09,148 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:52:09,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:52:09,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 03:52:09,192 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-23 03:52:09,193 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-23 03:52:09,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:52:09,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:52:09,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:52:09,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:52:09,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:52:09,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:52:09,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 03:52:09,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:52:09,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 03:52:09,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:52:09,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:52:09,352 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:52:09,354 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:52:09,996 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:52:10,003 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:52:10,003 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 03:52:10,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:52:10 BoogieIcfgContainer [2021-11-23 03:52:10,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:52:10,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:52:10,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:52:10,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:52:10,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:52:08" (1/3) ... [2021-11-23 03:52:10,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bbf73f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:52:10, skipping insertion in model container [2021-11-23 03:52:10,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:08" (2/3) ... [2021-11-23 03:52:10,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bbf73f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:52:10, skipping insertion in model container [2021-11-23 03:52:10,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:52:10" (3/3) ... [2021-11-23 03:52:10,015 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_equal.i [2021-11-23 03:52:10,021 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:52:10,021 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:52:10,073 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:52:10,081 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-11-23 03:52:10,100 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:52:10,118 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 30 states have internal predecessors, (42), 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) [2021-11-23 03:52:10,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 03:52:10,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:10,125 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:10,126 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:10,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:10,133 INFO L85 PathProgramCache]: Analyzing trace with hash 976010426, now seen corresponding path program 1 times [2021-11-23 03:52:10,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:52:10,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071172054] [2021-11-23 03:52:10,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:10,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:52:10,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:52:10,156 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:52:10,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 03:52:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:10,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 03:52:10,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:52:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 03:52:10,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:52:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 03:52:10,510 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:52:10,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071172054] [2021-11-23 03:52:10,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071172054] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:10,512 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:10,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 03:52:10,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540797420] [2021-11-23 03:52:10,515 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:10,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 03:52:10,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:52:10,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 03:52:10,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:52:10,561 INFO L87 Difference]: Start difference. First operand has 35 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 30 states have internal predecessors, (42), 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 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:52:10,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:10,593 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2021-11-23 03:52:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 03:52:10,597 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-11-23 03:52:10,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:10,604 INFO L225 Difference]: With dead ends: 61 [2021-11-23 03:52:10,604 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 03:52:10,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:52:10,613 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:10,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:52:10,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 03:52:10,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-23 03:52:10,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2021-11-23 03:52:10,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-11-23 03:52:10,665 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 24 [2021-11-23 03:52:10,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:10,667 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-11-23 03:52:10,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:52:10,671 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-11-23 03:52:10,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 03:52:10,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:10,673 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:10,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 03:52:10,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:52:10,897 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:10,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:10,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1442307826, now seen corresponding path program 1 times [2021-11-23 03:52:10,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:52:10,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [700248182] [2021-11-23 03:52:10,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:10,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:52:10,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:52:10,917 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:52:10,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 03:52:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:11,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:52:11,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:52:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:52:11,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:52:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 03:52:11,194 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:52:11,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [700248182] [2021-11-23 03:52:11,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [700248182] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:11,195 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:11,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-23 03:52:11,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098750843] [2021-11-23 03:52:11,195 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:11,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:52:11,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:52:11,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:52:11,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:52:11,198 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 03:52:11,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:11,225 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2021-11-23 03:52:11,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:52:11,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2021-11-23 03:52:11,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:11,227 INFO L225 Difference]: With dead ends: 50 [2021-11-23 03:52:11,227 INFO L226 Difference]: Without dead ends: 32 [2021-11-23 03:52:11,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:52:11,229 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:11,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 81 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:52:11,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-23 03:52:11,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-11-23 03:52:11,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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) [2021-11-23 03:52:11,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-11-23 03:52:11,239 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 24 [2021-11-23 03:52:11,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:11,239 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-11-23 03:52:11,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 03:52:11,239 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-11-23 03:52:11,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 03:52:11,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:11,242 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 03:52:11,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:52:11,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:52:11,443 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:11,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:11,444 INFO L85 PathProgramCache]: Analyzing trace with hash 915772386, now seen corresponding path program 1 times [2021-11-23 03:52:11,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:52:11,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717244529] [2021-11-23 03:52:11,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:11,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:52:11,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:52:11,453 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:52:11,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 03:52:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:11,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 03:52:11,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:52:12,174 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 03:52:12,176 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 1 case distinctions, treesize of input 29 treesize of output 17 [2021-11-23 03:52:12,445 INFO L354 Elim1Store]: treesize reduction 27, result has 34.1 percent of original size [2021-11-23 03:52:12,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2021-11-23 03:52:20,120 WARN L227 SmtUtils]: Spent 5.19s on a formula simplification. DAG size of input: 116 DAG size of output: 49 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 03:52:20,122 INFO L354 Elim1Store]: treesize reduction 427, result has 17.7 percent of original size [2021-11-23 03:52:20,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 69 treesize of output 117 [2021-11-23 03:52:21,692 INFO L354 Elim1Store]: treesize reduction 48, result has 76.4 percent of original size [2021-11-23 03:52:21,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 80 treesize of output 190 [2021-11-23 03:52:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:52:22,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:52:44,376 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_2 (_ BitVec 32)) (|node_create_~temp~0#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_prepend_~head#1.base_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_prepend_~head#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base| (store (store (store (select |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base|) |node_create_~temp~0#1.offset| (_ bv0 32)) (bvadd (_ bv4 32) |node_create_~temp~0#1.offset|) (_ bv0 32)) (bvadd |node_create_~temp~0#1.offset| (_ bv8 32)) v_DerPreprocessor_2)) |v_ULTIMATE.start_dll_circular_prepend_~head#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_dll_circular_prepend_~head#1.offset_BEFORE_CALL_2|) (_ bv0 32))) (exists ((|v_node_create_~temp~0#1.offset_19| (_ BitVec 32)) (v_DerPreprocessor_1 (_ BitVec 32)) (|v_node_create_~temp~0#1.base_19| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_19| |c_#StackHeapBarrier|) (= (_ bv0 32) (select (select (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_19| (store (store (store (select |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_19|) |v_node_create_~temp~0#1.offset_19| (_ bv0 32)) (bvadd (_ bv4 32) |v_node_create_~temp~0#1.offset_19|) (_ bv0 32)) (bvadd (_ bv8 32) |v_node_create_~temp~0#1.offset_19|) v_DerPreprocessor_1)) |v_ULTIMATE.start_dll_circular_prepend_~head#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_dll_circular_prepend_~head#1.offset_BEFORE_CALL_2|)))))) is different from false [2021-11-23 03:52:46,888 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_20| (_ BitVec 32))) (or (not (bvult |v_node_create_~temp~0#1.base_20| |c_#StackHeapBarrier|)) (forall ((v_DerPreprocessor_2 (_ BitVec 32)) (|node_create_~temp~0#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_prepend_~head#1.base_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_prepend_~head#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_20| (store (store (store (select |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_20|) |node_create_~temp~0#1.offset| (_ bv0 32)) (bvadd (_ bv4 32) |node_create_~temp~0#1.offset|) (_ bv0 32)) (bvadd |node_create_~temp~0#1.offset| (_ bv8 32)) v_DerPreprocessor_2)) |v_ULTIMATE.start_dll_circular_prepend_~head#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_dll_circular_prepend_~head#1.offset_BEFORE_CALL_2|) (_ bv0 32))) (exists ((|v_node_create_~temp~0#1.offset_19| (_ BitVec 32)) (v_DerPreprocessor_1 (_ BitVec 32)) (|v_node_create_~temp~0#1.base_19| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_19| |c_#StackHeapBarrier|) (= (_ bv0 32) (select (select (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_19| (store (store (store (select |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_19|) |v_node_create_~temp~0#1.offset_19| (_ bv0 32)) (bvadd (_ bv4 32) |v_node_create_~temp~0#1.offset_19|) (_ bv0 32)) (bvadd (_ bv8 32) |v_node_create_~temp~0#1.offset_19|) v_DerPreprocessor_1)) |v_ULTIMATE.start_dll_circular_prepend_~head#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_dll_circular_prepend_~head#1.offset_BEFORE_CALL_2|)))))))) is different from true [2021-11-23 03:52:47,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89959 treesize of output 89443 [2021-11-23 03:52:54,588 WARN L227 SmtUtils]: Spent 7.34s on a formula simplification. DAG size of input: 353 DAG size of output: 353 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 03:53:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2021-11-23 03:53:06,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:53:06,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717244529] [2021-11-23 03:53:06,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717244529] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:53:06,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2048570572] [2021-11-23 03:53:06,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:06,554 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:53:06,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:53:06,556 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:53:06,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 03:53:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:53:06,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 03:53:06,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:53:09,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-23 03:53:10,245 INFO L354 Elim1Store]: treesize reduction 193, result has 11.1 percent of original size [2021-11-23 03:53:10,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 40 [2021-11-23 03:53:10,627 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-23 03:53:10,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-11-23 03:53:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:53:10,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:53:28,634 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_4 (_ BitVec 32)) (|node_create_~temp~0#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_prepend_~head#1.base_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_prepend_~head#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base| (store (store (store (select |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base|) |node_create_~temp~0#1.offset| (_ bv0 32)) (bvadd (_ bv4 32) |node_create_~temp~0#1.offset|) (_ bv0 32)) (bvadd |node_create_~temp~0#1.offset| (_ bv8 32)) v_DerPreprocessor_4)) |v_ULTIMATE.start_dll_circular_prepend_~head#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_dll_circular_prepend_~head#1.offset_BEFORE_CALL_2|) (_ bv0 32))) (exists ((|v_node_create_~temp~0#1.offset_19| (_ BitVec 32)) (v_DerPreprocessor_1 (_ BitVec 32)) (|v_node_create_~temp~0#1.base_19| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_19| |c_#StackHeapBarrier|) (= (_ bv0 32) (select (select (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_19| (store (store (store (select |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_19|) |v_node_create_~temp~0#1.offset_19| (_ bv0 32)) (bvadd (_ bv4 32) |v_node_create_~temp~0#1.offset_19|) (_ bv0 32)) (bvadd (_ bv8 32) |v_node_create_~temp~0#1.offset_19|) v_DerPreprocessor_1)) |v_ULTIMATE.start_dll_circular_prepend_~head#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_dll_circular_prepend_~head#1.offset_BEFORE_CALL_2|)))))) is different from false [2021-11-23 03:53:31,146 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_31| (_ BitVec 32))) (or (forall ((v_DerPreprocessor_4 (_ BitVec 32)) (|node_create_~temp~0#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_prepend_~head#1.base_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_prepend_~head#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_31| (store (store (store (select |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_31|) |node_create_~temp~0#1.offset| (_ bv0 32)) (bvadd (_ bv4 32) |node_create_~temp~0#1.offset|) (_ bv0 32)) (bvadd |node_create_~temp~0#1.offset| (_ bv8 32)) v_DerPreprocessor_4)) |v_ULTIMATE.start_dll_circular_prepend_~head#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_dll_circular_prepend_~head#1.offset_BEFORE_CALL_2|) (_ bv0 32))) (exists ((|v_node_create_~temp~0#1.offset_19| (_ BitVec 32)) (v_DerPreprocessor_1 (_ BitVec 32)) (|v_node_create_~temp~0#1.base_19| (_ BitVec 32))) (and (bvult |v_node_create_~temp~0#1.base_19| |c_#StackHeapBarrier|) (= (_ bv0 32) (select (select (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_19| (store (store (store (select |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_19|) |v_node_create_~temp~0#1.offset_19| (_ bv0 32)) (bvadd (_ bv4 32) |v_node_create_~temp~0#1.offset_19|) (_ bv0 32)) (bvadd (_ bv8 32) |v_node_create_~temp~0#1.offset_19|) v_DerPreprocessor_1)) |v_ULTIMATE.start_dll_circular_prepend_~head#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_dll_circular_prepend_~head#1.offset_BEFORE_CALL_2|)))))) (not (bvult |v_node_create_~temp~0#1.base_31| |c_#StackHeapBarrier|)))) is different from true [2021-11-23 03:53:31,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 169 [2021-11-23 03:53:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2021-11-23 03:53:33,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2048570572] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:53:33,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329069512] [2021-11-23 03:53:33,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:33,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:53:33,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:53:33,700 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:53:33,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:53:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:53:33,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-23 03:53:33,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:53:35,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:53:35,533 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 03:53:35,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-11-23 03:53:36,154 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-23 03:53:36,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 31 [2021-11-23 03:53:36,173 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 17 treesize of output 15 [2021-11-23 03:53:36,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2021-11-23 03:53:36,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-11-23 03:53:36,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:53:36,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 38 [2021-11-23 03:53:36,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:53:36,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 20 [2021-11-23 03:53:36,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:53:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:53:36,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:53:37,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 706 treesize of output 702 [2021-11-23 03:53:56,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:53:56,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 4724 treesize of output 4450 [2021-11-23 03:53:56,708 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-23 03:53:56,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-23 03:53:56,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16, 15] total 38 [2021-11-23 03:53:56,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225184418] [2021-11-23 03:53:56,709 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-23 03:53:56,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-23 03:53:56,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:53:56,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-23 03:53:56,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2640, Unknown=20, NotChecked=428, Total=3306 [2021-11-23 03:53:56,715 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 38 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 29 states have internal predecessors, (65), 6 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-23 03:54:16,302 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:54:17,541 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:54:19,558 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:54:21,982 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:54:22,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:22,068 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-11-23 03:54:22,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 03:54:22,069 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 29 states have internal predecessors, (65), 6 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 34 [2021-11-23 03:54:22,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:22,072 INFO L225 Difference]: With dead ends: 37 [2021-11-23 03:54:22,072 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 03:54:22,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 81.7s TimeCoverageRelationStatistics Valid=289, Invalid=3246, Unknown=21, NotChecked=476, Total=4032 [2021-11-23 03:54:22,078 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:22,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 256 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 159 Invalid, 2 Unknown, 168 Unchecked, 8.9s Time] [2021-11-23 03:54:22,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 03:54:22,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-11-23 03:54:22,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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) [2021-11-23 03:54:22,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-23 03:54:22,088 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 34 [2021-11-23 03:54:22,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:22,089 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-23 03:54:22,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 29 states have internal predecessors, (65), 6 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-23 03:54:22,090 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-11-23 03:54:22,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 03:54:22,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:22,092 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 03:54:22,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:22,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-23 03:54:22,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:22,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:54:22,696 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:22,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:22,696 INFO L85 PathProgramCache]: Analyzing trace with hash 917619428, now seen corresponding path program 1 times [2021-11-23 03:54:22,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:54:22,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605715788] [2021-11-23 03:54:22,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:22,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:54:22,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:54:22,705 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:54:22,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 03:54:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:23,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-23 03:54:23,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:23,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:54:23,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-11-23 03:54:23,378 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 03:54:23,379 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 22 treesize of output 29 [2021-11-23 03:54:23,652 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:54:23,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 28 [2021-11-23 03:54:23,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:54:23,992 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 03:54:23,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 32 treesize of output 40 [2021-11-23 03:54:24,919 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:54:24,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 35 [2021-11-23 03:54:25,484 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-23 03:54:25,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 84 [2021-11-23 03:54:25,501 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:54:25,501 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 75 treesize of output 69 [2021-11-23 03:54:25,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 03:54:25,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:54:26,618 INFO L354 Elim1Store]: treesize reduction 242, result has 8.3 percent of original size [2021-11-23 03:54:26,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 149 treesize of output 129 [2021-11-23 03:54:26,710 INFO L354 Elim1Store]: treesize reduction 64, result has 24.7 percent of original size [2021-11-23 03:54:26,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 142 treesize of output 142 [2021-11-23 03:54:26,912 INFO L354 Elim1Store]: treesize reduction 88, result has 14.6 percent of original size [2021-11-23 03:54:26,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2021-11-23 03:55:24,857 WARN L227 SmtUtils]: Spent 56.92s on a formula simplification. DAG size of input: 191 DAG size of output: 46 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 03:55:24,858 INFO L354 Elim1Store]: treesize reduction 1086, result has 6.2 percent of original size [2021-11-23 03:55:24,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 24 case distinctions, treesize of input 980 treesize of output 484 [2021-11-23 03:55:30,203 WARN L227 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 91 DAG size of output: 27 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 03:55:30,204 INFO L354 Elim1Store]: treesize reduction 591, result has 7.9 percent of original size [2021-11-23 03:55:30,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 826 treesize of output 440 [2021-11-23 03:55:32,436 INFO L354 Elim1Store]: treesize reduction 788, result has 11.0 percent of original size [2021-11-23 03:55:32,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 600 treesize of output 437 [2021-11-23 03:55:32,495 INFO L354 Elim1Store]: treesize reduction 129, result has 16.2 percent of original size [2021-11-23 03:55:32,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 416 treesize of output 395 [2021-11-23 03:55:33,330 INFO L354 Elim1Store]: treesize reduction 128, result has 14.1 percent of original size [2021-11-23 03:55:33,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 268 treesize of output 143 [2021-11-23 03:55:33,373 INFO L354 Elim1Store]: treesize reduction 108, result has 0.9 percent of original size [2021-11-23 03:55:33,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 119 treesize of output 85 [2021-11-23 03:55:34,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-11-23 03:55:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:55:34,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:55:37,382 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_prepend_~last~1#1.offset_6| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.offset_6| (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32)) (v_DerPreprocessor_17 (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32)) (v_DerPreprocessor_16 (_ BitVec 32))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse12 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse5 (select .cse12 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|)) (.cse17 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse1 (bvadd |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| (_ bv4 32))) (.cse3 (select (select |c_#memory_$Pointer$.base| .cse5) (bvadd (_ bv4 32) (select .cse17 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|)))) (.cse6 (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.offset_6|))) (select (select (let ((.cse0 (let ((.cse2 (let ((.cse4 (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| v_DerPreprocessor_17)))) (store .cse7 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse7 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| v_DerPreprocessor_16))))) (store .cse4 .cse5 (store (select .cse4 .cse5) .cse6 v_DerPreprocessor_15))))) (store .cse2 .cse3 (store (select .cse2 .cse3) |v_ULTIMATE.start_dll_circular_prepend_~last~1#1.offset_6| v_DerPreprocessor_14))))) (store .cse0 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) .cse1 v_DerPreprocessor_13))) (select (select (let ((.cse8 (let ((.cse9 (let ((.cse10 (let ((.cse11 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse12 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|)))) (store .cse11 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse11 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| .cse5))))) (store .cse10 .cse5 (store (select .cse10 .cse5) .cse6 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|))))) (store .cse9 .cse3 (store (select .cse9 .cse3) |v_ULTIMATE.start_dll_circular_prepend_~last~1#1.offset_6| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|))))) (store .cse8 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse8 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) .cse1 .cse3))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (_ bv8 32) (select (select (let ((.cse13 (let ((.cse14 (let ((.cse15 (let ((.cse16 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse17 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|)))) (store .cse16 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse16 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| |v_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.offset_6|))))) (store .cse15 .cse5 (store (select .cse15 .cse5) .cse6 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|))))) (store .cse14 .cse3 (store (select .cse14 .cse3) |v_ULTIMATE.start_dll_circular_prepend_~last~1#1.offset_6| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|))))) (store .cse13 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse13 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) .cse1 |v_ULTIMATE.start_dll_circular_prepend_~last~1#1.offset_6|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))))) is different from false [2021-11-23 03:55:41,263 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_prepend_~last~1#1.offset_6| (_ BitVec 32)) (|v_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.offset_6| (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32)) (v_DerPreprocessor_17 (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32)) (v_DerPreprocessor_16 (_ BitVec 32))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse12 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse5 (select .cse12 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|)) (.cse17 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset|)) (.cse3 (select (select |c_#memory_$Pointer$.base| .cse5) (bvadd (_ bv4 32) (select .cse17 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|)))) (.cse6 (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.offset_6|))) (select (select (let ((.cse0 (let ((.cse2 (let ((.cse4 (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| v_DerPreprocessor_17)))) (store .cse7 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| (store (select .cse7 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset| v_DerPreprocessor_16))))) (store .cse4 .cse5 (store (select .cse4 .cse5) .cse6 v_DerPreprocessor_15))))) (store .cse2 .cse3 (store (select .cse2 .cse3) |v_ULTIMATE.start_dll_circular_prepend_~last~1#1.offset_6| v_DerPreprocessor_14))))) (store .cse0 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|) .cse1 v_DerPreprocessor_13))) (select (select (let ((.cse8 (let ((.cse9 (let ((.cse10 (let ((.cse11 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse12 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|)))) (store .cse11 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| (store (select .cse11 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset| .cse5))))) (store .cse10 .cse5 (store (select .cse10 .cse5) .cse6 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|))))) (store .cse9 .cse3 (store (select .cse9 .cse3) |v_ULTIMATE.start_dll_circular_prepend_~last~1#1.offset_6| |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|))))) (store .cse8 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| (store (select .cse8 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|) .cse1 .cse3))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (_ bv8 32) (select (select (let ((.cse13 (let ((.cse14 (let ((.cse15 (let ((.cse16 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse17 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset|)))) (store .cse16 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| (store (select .cse16 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset| |v_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.offset_6|))))) (store .cse15 .cse5 (store (select .cse15 .cse5) .cse6 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset|))))) (store .cse14 .cse3 (store (select .cse14 .cse3) |v_ULTIMATE.start_dll_circular_prepend_~last~1#1.offset_6| |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset|))))) (store .cse13 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| (store (select .cse13 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|) .cse1 |v_ULTIMATE.start_dll_circular_prepend_~last~1#1.offset_6|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))))) is different from false [2021-11-23 03:55:42,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6237986 treesize of output 6190114 [2021-11-23 03:55:47,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:55:47,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605715788] [2021-11-23 03:55:47,709 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-23 03:55:47,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [600451852] [2021-11-23 03:55:47,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:47,709 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:55:47,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:55:47,711 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:55:47,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 03:55:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:48,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-23 03:55:48,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:55:48,554 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 [2021-11-23 03:55:49,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-23 03:55:50,319 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 03:55:50,319 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 25 treesize of output 32 [2021-11-23 03:55:51,695 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:55:51,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 41 [2021-11-23 03:55:52,649 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:55:52,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 70 [2021-11-23 03:55:52,664 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:55:52,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 57 [2021-11-23 03:55:52,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 03:55:53,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:55:54,596 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:55:54,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-11-23 03:55:54,816 INFO L354 Elim1Store]: treesize reduction 151, result has 12.7 percent of original size [2021-11-23 03:55:54,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 153 treesize of output 121 [2021-11-23 03:55:54,904 INFO L354 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2021-11-23 03:55:54,904 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 146 treesize of output 148 [2021-11-23 03:56:03,542 WARN L227 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 78 DAG size of output: 25 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 03:56:03,543 INFO L354 Elim1Store]: treesize reduction 271, result has 10.9 percent of original size [2021-11-23 03:56:03,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 1077 treesize of output 671 [2021-11-23 03:56:06,718 INFO L354 Elim1Store]: treesize reduction 808, result has 5.9 percent of original size [2021-11-23 03:56:06,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 24 case distinctions, treesize of input 733 treesize of output 250 [2021-11-23 03:56:07,055 INFO L354 Elim1Store]: treesize reduction 731, result has 7.0 percent of original size [2021-11-23 03:56:07,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 531 treesize of output 326 [2021-11-23 03:56:07,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 280 treesize of output 256 [2021-11-23 03:56:08,271 INFO L354 Elim1Store]: treesize reduction 61, result has 6.2 percent of original size [2021-11-23 03:56:08,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 216 treesize of output 112 [2021-11-23 03:56:08,315 INFO L354 Elim1Store]: treesize reduction 92, result has 1.1 percent of original size [2021-11-23 03:56:08,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 87 treesize of output 65 [2021-11-23 03:56:08,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-11-23 03:56:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:56:08,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:56:11,448 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_prepend_~last~1#1.offset_7| (_ BitVec 32)) (v_DerPreprocessor_24 (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse18 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse17 (select .cse18 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|)) (.cse12 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse5 (select .cse12 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|)) (.cse6 (bvadd (_ bv4 32) .cse17))) (let ((.cse1 (bvadd |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| (_ bv4 32))) (.cse3 (select (select |c_#memory_$Pointer$.base| .cse5) .cse6))) (select (select (let ((.cse0 (let ((.cse2 (let ((.cse4 (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| v_DerPreprocessor_27)))) (store .cse7 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse7 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| v_DerPreprocessor_26))))) (store .cse4 .cse5 (store (select .cse4 .cse5) .cse6 v_DerPreprocessor_25))))) (store .cse2 .cse3 (store (select .cse2 .cse3) |v_ULTIMATE.start_dll_circular_prepend_~last~1#1.offset_7| v_DerPreprocessor_24))))) (store .cse0 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) .cse1 v_DerPreprocessor_23))) (select (select (let ((.cse8 (let ((.cse9 (let ((.cse10 (let ((.cse11 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse12 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|)))) (store .cse11 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse11 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| .cse5))))) (store .cse10 .cse5 (store (select .cse10 .cse5) .cse6 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|))))) (store .cse9 .cse3 (store (select .cse9 .cse3) |v_ULTIMATE.start_dll_circular_prepend_~last~1#1.offset_7| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|))))) (store .cse8 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse8 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) .cse1 .cse3))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (select (select (let ((.cse13 (let ((.cse14 (let ((.cse15 (let ((.cse16 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse18 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|)))) (store .cse16 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse16 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| .cse17))))) (store .cse15 .cse5 (store (select .cse15 .cse5) .cse6 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|))))) (store .cse14 .cse3 (store (select .cse14 .cse3) |v_ULTIMATE.start_dll_circular_prepend_~last~1#1.offset_7| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|))))) (store .cse13 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse13 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) .cse1 |v_ULTIMATE.start_dll_circular_prepend_~last~1#1.offset_7|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv8 32))))))))) is different from false [2021-11-23 03:57:12,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3410774 treesize of output 3384790 [2021-11-23 03:57:15,361 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-23 03:57:15,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642216209] [2021-11-23 03:57:15,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:57:15,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:57:15,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:57:15,369 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:57:15,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2db2845-077d-4b27-bb34-47e3047705ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:57:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:57:15,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-23 03:57:15,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:57:15,518 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 [2021-11-23 03:57:17,511 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 03:57:17,512 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 21 treesize of output 28 [2021-11-23 03:57:20,009 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-23 03:57:20,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 62 [2021-11-23 03:57:22,622 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:57:22,622 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 1 case distinctions, treesize of input 57 treesize of output 44 [2021-11-23 03:57:26,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:57:27,417 INFO L354 Elim1Store]: treesize reduction 151, result has 12.7 percent of original size [2021-11-23 03:57:27,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 165 treesize of output 133 [2021-11-23 03:57:27,502 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-11-23 03:57:27,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 158 treesize of output 162 [2021-11-23 03:57:27,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-23 03:58:15,617 WARN L227 SmtUtils]: Spent 45.32s on a formula simplification. DAG size of input: 177 DAG size of output: 44 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 03:58:15,617 INFO L354 Elim1Store]: treesize reduction 974, result has 6.3 percent of original size [2021-11-23 03:58:15,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 24 case distinctions, treesize of input 1003 treesize of output 485 [2021-11-23 03:58:17,402 INFO L354 Elim1Store]: treesize reduction 499, result has 9.3 percent of original size [2021-11-23 03:58:17,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 819 treesize of output 425 [2021-11-23 03:58:17,725 INFO L354 Elim1Store]: treesize reduction 731, result has 7.0 percent of original size [2021-11-23 03:58:17,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 567 treesize of output 362 [2021-11-23 03:58:17,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 316 treesize of output 292 [2021-11-23 03:58:18,850 INFO L354 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2021-11-23 03:58:18,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 260 treesize of output 127 [2021-11-23 03:58:18,893 INFO L354 Elim1Store]: treesize reduction 92, result has 1.1 percent of original size [2021-11-23 03:58:18,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 99 treesize of output 73 [2021-11-23 03:58:19,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:58:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:58:19,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:58:43,011 WARN L227 SmtUtils]: Spent 6.86s on a formula simplification that was a NOOP. DAG size: 87 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:59:18,639 WARN L227 SmtUtils]: Spent 6.28s on a formula simplification that was a NOOP. DAG size: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:59:19,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1599322421 treesize of output 1587067189 [2021-11-23 04:01:38,560 WARN L227 SmtUtils]: Spent 2.31m on a formula simplification that was a NOOP. DAG size: 1421 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 04:03:55,759 WARN L227 SmtUtils]: Spent 2.28m on a formula simplification that was a NOOP. DAG size: 1425 (called from [L 179] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate)