./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 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P --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-53f42b1 [2021-11-21 00:41:33,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:41:33,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:41:33,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:41:33,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:41:33,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:41:33,250 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:41:33,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:41:33,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:41:33,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:41:33,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:41:33,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:41:33,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:41:33,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:41:33,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:41:33,268 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:41:33,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:41:33,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:41:33,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:41:33,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:41:33,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:41:33,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:41:33,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:41:33,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:41:33,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:41:33,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:41:33,307 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:41:33,309 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:41:33,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:41:33,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:41:33,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:41:33,314 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:41:33,317 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:41:33,319 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:41:33,321 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:41:33,321 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:41:33,322 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:41:33,322 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:41:33,323 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:41:33,324 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:41:33,325 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:41:33,326 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:41:33,376 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:41:33,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:41:33,377 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:41:33,377 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:41:33,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:41:33,378 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:41:33,378 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:41:33,378 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:41:33,379 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:41:33,379 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:41:33,379 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:41:33,379 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:41:33,379 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:41:33,380 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:41:33,380 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:41:33,380 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:41:33,380 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:41:33,380 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:41:33,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:41:33,381 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:41:33,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:41:33,382 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:41:33,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:41:33,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:41:33,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:41:33,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:41:33,383 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:41:33,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:41:33,383 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:41:33,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:41:33,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:41:33,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:41:33,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:41:33,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:41:33,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:41:33,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:41:33,389 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:41:33,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:41:33,389 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:41:33,390 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:41:33,390 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:41:33,390 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_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 [2021-11-21 00:41:33,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:41:33,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:41:33,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:41:33,671 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:41:33,672 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:41:33,673 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-11-21 00:41:33,734 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/data/5412dde90/6ac3ad8ab9594e55978ec2843d445d0f/FLAG758acffed [2021-11-21 00:41:34,301 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:41:34,302 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-11-21 00:41:34,316 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/data/5412dde90/6ac3ad8ab9594e55978ec2843d445d0f/FLAG758acffed [2021-11-21 00:41:34,606 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/data/5412dde90/6ac3ad8ab9594e55978ec2843d445d0f [2021-11-21 00:41:34,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:41:34,610 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:41:34,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:41:34,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:41:34,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:41:34,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:41:34" (1/1) ... [2021-11-21 00:41:34,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e443681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:34, skipping insertion in model container [2021-11-21 00:41:34,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:41:34" (1/1) ... [2021-11-21 00:41:34,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:41:34,682 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:41:34,992 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_6ce61f1a-3990-4573-a0a7-310a3fbee52b/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-11-21 00:41:34,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:41:35,004 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:41:35,049 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_6ce61f1a-3990-4573-a0a7-310a3fbee52b/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-11-21 00:41:35,049 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:41:35,088 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:41:35,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:35 WrapperNode [2021-11-21 00:41:35,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:41:35,089 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:41:35,090 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:41:35,090 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:41:35,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:35" (1/1) ... [2021-11-21 00:41:35,133 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:35" (1/1) ... [2021-11-21 00:41:35,170 INFO L137 Inliner]: procedures = 127, calls = 47, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 134 [2021-11-21 00:41:35,171 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:41:35,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:41:35,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:41:35,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:41:35,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:35" (1/1) ... [2021-11-21 00:41:35,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:35" (1/1) ... [2021-11-21 00:41:35,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:35" (1/1) ... [2021-11-21 00:41:35,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:35" (1/1) ... [2021-11-21 00:41:35,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:35" (1/1) ... [2021-11-21 00:41:35,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:35" (1/1) ... [2021-11-21 00:41:35,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:35" (1/1) ... [2021-11-21 00:41:35,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:41:35,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:41:35,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:41:35,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:41:35,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:35" (1/1) ... [2021-11-21 00:41:35,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:41:35,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:41:35,282 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:41:35,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:41:35,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:41:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:41:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-21 00:41:35,336 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-21 00:41:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:41:35,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:41:35,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:41:35,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:41:35,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:41:35,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:41:35,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:41:35,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:41:35,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:41:35,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:41:35,513 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:41:35,514 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:41:35,802 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:41:35,878 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:41:35,879 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 00:41:35,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:41:35 BoogieIcfgContainer [2021-11-21 00:41:35,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:41:35,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:41:35,892 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:41:35,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:41:35,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:41:34" (1/3) ... [2021-11-21 00:41:35,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@631a29f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:41:35, skipping insertion in model container [2021-11-21 00:41:35,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:35" (2/3) ... [2021-11-21 00:41:35,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@631a29f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:41:35, skipping insertion in model container [2021-11-21 00:41:35,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:41:35" (3/3) ... [2021-11-21 00:41:35,899 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_equal.i [2021-11-21 00:41:35,904 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:41:35,904 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:41:35,950 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:41:35,957 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 [2021-11-21 00:41:35,958 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:41:35,974 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) [2021-11-21 00:41:35,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 00:41:35,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:35,980 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:41:35,980 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:35,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:35,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1264371919, now seen corresponding path program 1 times [2021-11-21 00:41:35,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:35,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908584089] [2021-11-21 00:41:35,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:35,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:41:36,238 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:36,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908584089] [2021-11-21 00:41:36,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908584089] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:36,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:36,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:41:36,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711329721] [2021-11-21 00:41:36,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:36,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:41:36,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:36,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:41:36,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:41:36,283 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) [2021-11-21 00:41:36,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:36,435 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2021-11-21 00:41:36,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:41:36,438 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 [2021-11-21 00:41:36,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:36,445 INFO L225 Difference]: With dead ends: 43 [2021-11-21 00:41:36,445 INFO L226 Difference]: Without dead ends: 20 [2021-11-21 00:41:36,447 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 [2021-11-21 00:41:36,451 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 [2021-11-21 00:41:36,452 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] [2021-11-21 00:41:36,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-21 00:41:36,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-21 00:41:36,487 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) [2021-11-21 00:41:36,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-21 00:41:36,489 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2021-11-21 00:41:36,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:36,490 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-21 00:41:36,490 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) [2021-11-21 00:41:36,490 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-21 00:41:36,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 00:41:36,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:36,492 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:41:36,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:41:36,493 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:36,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:36,496 INFO L85 PathProgramCache]: Analyzing trace with hash -336525961, now seen corresponding path program 1 times [2021-11-21 00:41:36,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:36,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663379439] [2021-11-21 00:41:36,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:36,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:38,007 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:38,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663379439] [2021-11-21 00:41:38,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663379439] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:41:38,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645759039] [2021-11-21 00:41:38,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:38,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:41:38,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:41:38,012 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:41:38,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:41:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:38,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-21 00:41:38,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:38,269 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 [2021-11-21 00:41:38,331 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 [2021-11-21 00:41:38,457 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:41:38,458 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 [2021-11-21 00:41:38,673 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:41:38,675 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 [2021-11-21 00:41:38,845 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:41:38,845 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 [2021-11-21 00:41:39,101 INFO L354 Elim1Store]: treesize reduction 45, result has 19.6 percent of original size [2021-11-21 00:41:39,102 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 [2021-11-21 00:41:39,310 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-21 00:41:39,312 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 [2021-11-21 00:41:39,329 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 00:41:39,330 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 [2021-11-21 00:41:39,447 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 [2021-11-21 00:41:39,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:41:39,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:41:39,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:41:39,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:41:39,696 INFO L354 Elim1Store]: treesize reduction 342, result has 5.8 percent of original size [2021-11-21 00:41:39,697 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 [2021-11-21 00:41:39,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:41:39,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:41:39,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:41:39,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:41:39,714 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 [2021-11-21 00:41:39,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:41:39,745 INFO L354 Elim1Store]: treesize reduction 68, result has 28.4 percent of original size [2021-11-21 00:41:39,745 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 [2021-11-21 00:41:40,175 INFO L354 Elim1Store]: treesize reduction 86, result has 1.1 percent of original size [2021-11-21 00:41:40,176 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 [2021-11-21 00:41:40,234 INFO L354 Elim1Store]: treesize reduction 124, result has 0.8 percent of original size [2021-11-21 00:41:40,235 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 [2021-11-21 00:41:40,817 INFO L354 Elim1Store]: treesize reduction 558, result has 6.4 percent of original size [2021-11-21 00:41:40,817 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 [2021-11-21 00:41:41,622 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 [2021-11-21 00:41:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:41:41,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:41:41,783 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-21 00:41:41,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [35487064] [2021-11-21 00:41:41,808 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 00:41:41,809 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:41:41,814 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:41:41,819 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:41:41,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:41:41,890 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@1b3c10dc 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$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:278) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:264) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:41:41,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:41:41,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-21 00:41:41,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611872401] [2021-11-21 00:41:41,898 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 00:41:41,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-21 00:41:41,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:41,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-21 00:41:41,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2021-11-21 00:41:41,903 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) [2021-11-21 00:41:41,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 00:41:41,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2021-11-21 00:41:41,906 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 [2021-11-21 00:41:41,909 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] [2021-11-21 00:41:41,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:41:42,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-21 00:41:42,124 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@1b3c10dc 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:359) 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$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$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) [2021-11-21 00:41:42,126 INFO L158 Benchmark]: Toolchain (without parser) took 7516.40ms. Allocated memory was 104.9MB in the beginning and 167.8MB in the end (delta: 62.9MB). Free memory was 70.7MB in the beginning and 66.9MB in the end (delta: 3.8MB). Peak memory consumption was 66.6MB. Max. memory is 16.1GB. [2021-11-21 00:41:42,127 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 104.9MB. Free memory was 55.9MB in the beginning and 55.8MB in the end (delta: 45.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:41:42,127 INFO L158 Benchmark]: CACSL2BoogieTranslator took 473.03ms. Allocated memory is still 104.9MB. Free memory was 70.5MB in the beginning and 70.0MB in the end (delta: 454.1kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-21 00:41:42,128 INFO L158 Benchmark]: Boogie Procedure Inliner took 81.37ms. Allocated memory is still 104.9MB. Free memory was 70.0MB in the beginning and 67.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:41:42,128 INFO L158 Benchmark]: Boogie Preprocessor took 53.47ms. Allocated memory is still 104.9MB. Free memory was 67.9MB in the beginning and 66.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:41:42,129 INFO L158 Benchmark]: RCFGBuilder took 655.78ms. Allocated memory was 104.9MB in the beginning and 138.4MB in the end (delta: 33.6MB). Free memory was 66.2MB in the beginning and 111.6MB in the end (delta: -45.4MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. [2021-11-21 00:41:42,129 INFO L158 Benchmark]: TraceAbstraction took 6233.87ms. Allocated memory was 138.4MB in the beginning and 167.8MB in the end (delta: 29.4MB). Free memory was 112.3MB in the beginning and 66.9MB in the end (delta: 45.4MB). Peak memory consumption was 73.8MB. Max. memory is 16.1GB. [2021-11-21 00:41:42,131 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 104.9MB. Free memory was 55.9MB in the beginning and 55.8MB in the end (delta: 45.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 473.03ms. Allocated memory is still 104.9MB. Free memory was 70.5MB in the beginning and 70.0MB in the end (delta: 454.1kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 81.37ms. Allocated memory is still 104.9MB. Free memory was 70.0MB in the beginning and 67.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.47ms. Allocated memory is still 104.9MB. Free memory was 67.9MB in the beginning and 66.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 655.78ms. Allocated memory was 104.9MB in the beginning and 138.4MB in the end (delta: 33.6MB). Free memory was 66.2MB in the beginning and 111.6MB in the end (delta: -45.4MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. * TraceAbstraction took 6233.87ms. Allocated memory was 138.4MB in the beginning and 167.8MB in the end (delta: 29.4MB). Free memory was 112.3MB in the beginning and 66.9MB in the end (delta: 45.4MB). Peak memory consumption was 73.8MB. 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@1b3c10dc de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@1b3c10dc: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-21 00:41:42,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/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_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P --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-53f42b1 [2021-11-21 00:41:44,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:41:44,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:41:45,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:41:45,030 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:41:45,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:41:45,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:41:45,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:41:45,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:41:45,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:41:45,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:41:45,057 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:41:45,058 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:41:45,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:41:45,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:41:45,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:41:45,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:41:45,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:41:45,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:41:45,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:41:45,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:41:45,085 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:41:45,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:41:45,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:41:45,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:41:45,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:41:45,102 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:41:45,104 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:41:45,105 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:41:45,106 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:41:45,106 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:41:45,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:41:45,110 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:41:45,111 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:41:45,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:41:45,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:41:45,114 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:41:45,114 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:41:45,115 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:41:45,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:41:45,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:41:45,123 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-21 00:41:45,157 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:41:45,159 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:41:45,160 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:41:45,160 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:41:45,161 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:41:45,161 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:41:45,161 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:41:45,162 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:41:45,163 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:41:45,163 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:41:45,164 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:41:45,164 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:41:45,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:41:45,166 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:41:45,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:41:45,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:41:45,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:41:45,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:41:45,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:41:45,168 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 00:41:45,168 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 00:41:45,168 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:41:45,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:41:45,169 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:41:45,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:41:45,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:41:45,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 00:41:45,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:41:45,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:41:45,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:41:45,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:41:45,171 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:41:45,172 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 00:41:45,172 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 00:41:45,172 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:41:45,173 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:41:45,173 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:41:45,173 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_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 [2021-11-21 00:41:45,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:41:45,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:41:45,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:41:45,595 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:41:45,596 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:41:45,597 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-11-21 00:41:45,664 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/data/fc054063d/6b88b357ebb5465abf7cb182419f6793/FLAG50648a96f [2021-11-21 00:41:46,231 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:41:46,231 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-11-21 00:41:46,249 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/data/fc054063d/6b88b357ebb5465abf7cb182419f6793/FLAG50648a96f [2021-11-21 00:41:46,535 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/data/fc054063d/6b88b357ebb5465abf7cb182419f6793 [2021-11-21 00:41:46,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:41:46,539 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:41:46,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:41:46,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:41:46,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:41:46,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:41:46" (1/1) ... [2021-11-21 00:41:46,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a843b61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:46, skipping insertion in model container [2021-11-21 00:41:46,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:41:46" (1/1) ... [2021-11-21 00:41:46,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:41:46,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:41:47,037 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_6ce61f1a-3990-4573-a0a7-310a3fbee52b/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-11-21 00:41:47,041 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:41:47,057 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:41:47,116 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_6ce61f1a-3990-4573-a0a7-310a3fbee52b/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-11-21 00:41:47,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:41:47,160 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:41:47,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:47 WrapperNode [2021-11-21 00:41:47,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:41:47,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:41:47,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:41:47,163 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:41:47,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:47" (1/1) ... [2021-11-21 00:41:47,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:47" (1/1) ... [2021-11-21 00:41:47,233 INFO L137 Inliner]: procedures = 130, calls = 47, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 135 [2021-11-21 00:41:47,234 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:41:47,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:41:47,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:41:47,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:41:47,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:47" (1/1) ... [2021-11-21 00:41:47,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:47" (1/1) ... [2021-11-21 00:41:47,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:47" (1/1) ... [2021-11-21 00:41:47,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:47" (1/1) ... [2021-11-21 00:41:47,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:47" (1/1) ... [2021-11-21 00:41:47,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:47" (1/1) ... [2021-11-21 00:41:47,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:47" (1/1) ... [2021-11-21 00:41:47,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:41:47,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:41:47,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:41:47,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:41:47,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:47" (1/1) ... [2021-11-21 00:41:47,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:41:47,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:41:47,358 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:41:47,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:41:47,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-21 00:41:47,408 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-21 00:41:47,408 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-21 00:41:47,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:41:47,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:41:47,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:41:47,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:41:47,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:41:47,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:41:47,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-21 00:41:47,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:41:47,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 00:41:47,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:41:47,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:41:47,610 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:41:47,626 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:41:48,359 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:41:48,367 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:41:48,373 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 00:41:48,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:41:48 BoogieIcfgContainer [2021-11-21 00:41:48,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:41:48,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:41:48,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:41:48,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:41:48,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:41:46" (1/3) ... [2021-11-21 00:41:48,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51082179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:41:48, skipping insertion in model container [2021-11-21 00:41:48,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:47" (2/3) ... [2021-11-21 00:41:48,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51082179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:41:48, skipping insertion in model container [2021-11-21 00:41:48,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:41:48" (3/3) ... [2021-11-21 00:41:48,389 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_equal.i [2021-11-21 00:41:48,397 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:41:48,397 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:41:48,472 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:41:48,489 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 [2021-11-21 00:41:48,492 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:41:48,519 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) [2021-11-21 00:41:48,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 00:41:48,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:48,528 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] [2021-11-21 00:41:48,528 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:48,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:48,536 INFO L85 PathProgramCache]: Analyzing trace with hash 976010426, now seen corresponding path program 1 times [2021-11-21 00:41:48,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:41:48,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443684681] [2021-11-21 00:41:48,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:48,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:41:48,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:41:48,561 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:41:48,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 00:41:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:48,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-21 00:41:48,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:48,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:41:48,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:41:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:41:48,998 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:41:48,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [443684681] [2021-11-21 00:41:48,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [443684681] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:49,000 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:49,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 00:41:49,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851701743] [2021-11-21 00:41:49,003 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:49,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 00:41:49,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:41:49,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 00:41:49,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:41:49,048 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) [2021-11-21 00:41:49,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:49,075 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2021-11-21 00:41:49,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 00:41:49,077 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 [2021-11-21 00:41:49,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:49,084 INFO L225 Difference]: With dead ends: 61 [2021-11-21 00:41:49,084 INFO L226 Difference]: Without dead ends: 27 [2021-11-21 00:41:49,088 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 [2021-11-21 00:41:49,092 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 [2021-11-21 00:41:49,094 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] [2021-11-21 00:41:49,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-21 00:41:49,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-21 00:41:49,141 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) [2021-11-21 00:41:49,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-11-21 00:41:49,145 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 24 [2021-11-21 00:41:49,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:49,147 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-11-21 00:41:49,148 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) [2021-11-21 00:41:49,149 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-11-21 00:41:49,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 00:41:49,151 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:49,151 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] [2021-11-21 00:41:49,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:41:49,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:41:49,367 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:49,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:49,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1442307826, now seen corresponding path program 1 times [2021-11-21 00:41:49,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:41:49,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475710148] [2021-11-21 00:41:49,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:49,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:41:49,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:41:49,371 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:41:49,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 00:41:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:49,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:41:49,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:49,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:49,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:41:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:41:49,670 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:41:49,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475710148] [2021-11-21 00:41:49,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475710148] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:49,671 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:49,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-21 00:41:49,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227860460] [2021-11-21 00:41:49,671 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:49,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:41:49,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:41:49,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:41:49,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:41:49,675 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) [2021-11-21 00:41:49,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:49,699 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2021-11-21 00:41:49,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:41:49,700 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 [2021-11-21 00:41:49,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:49,702 INFO L225 Difference]: With dead ends: 50 [2021-11-21 00:41:49,702 INFO L226 Difference]: Without dead ends: 32 [2021-11-21 00:41:49,703 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 [2021-11-21 00:41:49,704 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 [2021-11-21 00:41:49,705 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] [2021-11-21 00:41:49,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-21 00:41:49,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-11-21 00:41:49,712 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) [2021-11-21 00:41:49,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-11-21 00:41:49,714 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 24 [2021-11-21 00:41:49,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:49,714 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-11-21 00:41:49,715 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) [2021-11-21 00:41:49,715 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-11-21 00:41:49,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 00:41:49,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:49,717 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] [2021-11-21 00:41:49,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:41:49,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:41:49,931 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:49,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:49,932 INFO L85 PathProgramCache]: Analyzing trace with hash 915772386, now seen corresponding path program 1 times [2021-11-21 00:41:49,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:41:49,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606965093] [2021-11-21 00:41:49,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:49,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:41:49,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:41:49,935 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:41:49,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 00:41:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:50,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 00:41:50,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:50,612 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:41:50,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-21 00:41:50,847 INFO L354 Elim1Store]: treesize reduction 27, result has 34.1 percent of original size [2021-11-21 00:41:50,848 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 [2021-11-21 00:41:55,588 INFO L354 Elim1Store]: treesize reduction 427, result has 17.7 percent of original size [2021-11-21 00:41:55,589 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 [2021-11-21 00:41:57,240 INFO L354 Elim1Store]: treesize reduction 48, result has 76.4 percent of original size [2021-11-21 00:41:57,240 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 [2021-11-21 00:41:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:41:58,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:42:19,773 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 [2021-11-21 00:42:22,247 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 [2021-11-21 00:42:22,541 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 89959 treesize of output 89443 [2021-11-21 00:42:29,265 WARN L227 SmtUtils]: Spent 6.72s 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) [2021-11-21 00:42:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2021-11-21 00:42:39,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:42:39,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606965093] [2021-11-21 00:42:39,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606965093] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:42:39,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [335397062] [2021-11-21 00:42:39,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:39,083 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:42:39,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:42:39,088 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:42:39,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-21 00:42:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:39,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 00:42:39,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:42,156 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 [2021-11-21 00:42:42,369 INFO L354 Elim1Store]: treesize reduction 193, result has 11.1 percent of original size [2021-11-21 00:42:42,370 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 [2021-11-21 00:42:42,892 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-21 00:42:42,893 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 [2021-11-21 00:42:42,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:42:42,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:42:59,276 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 [2021-11-21 00:43:01,659 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 [2021-11-21 00:43:01,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 169 [2021-11-21 00:43:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2021-11-21 00:43:04,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [335397062] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:43:04,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226893688] [2021-11-21 00:43:04,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:04,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:04,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:04,124 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:04,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:43:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:04,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-21 00:43:04,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:05,254 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 [2021-11-21 00:43:05,465 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-21 00:43:05,465 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 [2021-11-21 00:43:05,972 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-21 00:43:05,973 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 [2021-11-21 00:43:05,986 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 [2021-11-21 00:43:06,002 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 [2021-11-21 00:43:06,009 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 [2021-11-21 00:43:06,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:43:06,161 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 [2021-11-21 00:43:06,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:43:06,173 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 [2021-11-21 00:43:06,283 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 [2021-11-21 00:43:06,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:43:06,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:06,676 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 [2021-11-21 00:43:22,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:43:22,249 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 [2021-11-21 00:43:22,311 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-21 00:43:22,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-21 00:43:22,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16, 15] total 38 [2021-11-21 00:43:22,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701152157] [2021-11-21 00:43:22,312 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-21 00:43:22,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-21 00:43:22,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:43:22,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-21 00:43:22,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2641, Unknown=19, NotChecked=428, Total=3306 [2021-11-21 00:43:22,317 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) [2021-11-21 00:43:45,987 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:43:46,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:46,415 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-11-21 00:43:46,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 00:43:46,417 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 [2021-11-21 00:43:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:46,419 INFO L225 Difference]: With dead ends: 37 [2021-11-21 00:43:46,419 INFO L226 Difference]: Without dead ends: 29 [2021-11-21 00:43:46,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 78.6s TimeCoverageRelationStatistics Valid=289, Invalid=3247, Unknown=20, NotChecked=476, Total=4032 [2021-11-21 00:43:46,423 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:46,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 256 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 161 Invalid, 0 Unknown, 168 Unchecked, 6.3s Time] [2021-11-21 00:43:46,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-21 00:43:46,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-11-21 00:43:46,428 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) [2021-11-21 00:43:46,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-21 00:43:46,429 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 34 [2021-11-21 00:43:46,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:46,430 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-21 00:43:46,430 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) [2021-11-21 00:43:46,431 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-11-21 00:43:46,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 00:43:46,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:46,432 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] [2021-11-21 00:43:46,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:46,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-11-21 00:43:46,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-21 00:43:47,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:47,033 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:43:47,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:47,034 INFO L85 PathProgramCache]: Analyzing trace with hash 917619428, now seen corresponding path program 1 times [2021-11-21 00:43:47,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:43:47,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339899830] [2021-11-21 00:43:47,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:47,035 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:43:47,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:43:47,036 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:43:47,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-21 00:43:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:47,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-21 00:43:47,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:47,312 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 [2021-11-21 00:43:47,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-11-21 00:43:47,644 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 00:43:47,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-11-21 00:43:47,989 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:43:47,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 32 [2021-11-21 00:43:48,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:48,317 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-21 00:43:48,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 44 [2021-11-21 00:43:49,315 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:43:49,315 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 [2021-11-21 00:43:50,005 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-21 00:43:50,005 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 122 treesize of output 88 [2021-11-21 00:43:50,022 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 00:43:50,023 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 79 treesize of output 73 [2021-11-21 00:43:50,053 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 [2021-11-21 00:43:50,585 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 [2021-11-21 00:43:51,290 INFO L354 Elim1Store]: treesize reduction 242, result has 8.3 percent of original size [2021-11-21 00:43:51,291 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 133 [2021-11-21 00:43:51,379 INFO L354 Elim1Store]: treesize reduction 64, result has 24.7 percent of original size [2021-11-21 00:43:51,379 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 146 treesize of output 146 [2021-11-21 00:43:51,615 INFO L354 Elim1Store]: treesize reduction 88, result has 14.6 percent of original size [2021-11-21 00:43:51,616 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 [2021-11-21 00:44:38,326 WARN L227 SmtUtils]: Spent 45.55s 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) [2021-11-21 00:44:38,327 INFO L354 Elim1Store]: treesize reduction 1086, result has 6.2 percent of original size [2021-11-21 00:44:38,327 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 [2021-11-21 00:44:44,513 WARN L227 SmtUtils]: Spent 6.17s 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) [2021-11-21 00:44:44,514 INFO L354 Elim1Store]: treesize reduction 591, result has 7.9 percent of original size [2021-11-21 00:44:44,514 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 [2021-11-21 00:44:45,526 INFO L354 Elim1Store]: treesize reduction 788, result has 11.0 percent of original size [2021-11-21 00:44:45,526 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 [2021-11-21 00:44:45,581 INFO L354 Elim1Store]: treesize reduction 129, result has 16.2 percent of original size [2021-11-21 00:44:45,581 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 [2021-11-21 00:44:46,304 INFO L354 Elim1Store]: treesize reduction 128, result has 14.1 percent of original size [2021-11-21 00:44:46,304 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 [2021-11-21 00:44:46,341 INFO L354 Elim1Store]: treesize reduction 108, result has 0.9 percent of original size [2021-11-21 00:44:46,342 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 [2021-11-21 00:44:46,867 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 [2021-11-21 00:44:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:44:47,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:44:49,829 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 [2021-11-21 00:44:52,448 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 [2021-11-21 00:44:53,585 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 [2021-11-21 00:44:58,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:44:58,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339899830] [2021-11-21 00:44:58,442 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-21 00:44:58,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [405292882] [2021-11-21 00:44:58,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:44:58,442 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:44:58,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:44:58,443 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:44:58,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-21 00:44:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:44:58,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-21 00:44:58,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:44:59,142 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 [2021-11-21 00:45:00,124 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 [2021-11-21 00:45:00,965 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 00:45:00,966 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 25 treesize of output 32 [2021-11-21 00:45:02,436 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:45:02,436 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 [2021-11-21 00:45:03,387 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 00:45:03,388 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 [2021-11-21 00:45:03,402 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:45:03,402 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 [2021-11-21 00:45:03,416 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 [2021-11-21 00:45:04,447 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 [2021-11-21 00:45:05,231 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:45:05,231 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 [2021-11-21 00:45:05,454 INFO L354 Elim1Store]: treesize reduction 151, result has 12.7 percent of original size [2021-11-21 00:45:05,455 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 [2021-11-21 00:45:05,548 INFO L354 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2021-11-21 00:45:05,548 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 [2021-11-21 00:45:12,506 INFO L354 Elim1Store]: treesize reduction 271, result has 10.9 percent of original size [2021-11-21 00:45:12,506 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 [2021-11-21 00:45:15,036 INFO L354 Elim1Store]: treesize reduction 808, result has 5.9 percent of original size [2021-11-21 00:45:15,037 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 [2021-11-21 00:45:15,365 INFO L354 Elim1Store]: treesize reduction 731, result has 7.0 percent of original size [2021-11-21 00:45:15,365 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 [2021-11-21 00:45:15,378 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 [2021-11-21 00:45:16,574 INFO L354 Elim1Store]: treesize reduction 61, result has 6.2 percent of original size [2021-11-21 00:45:16,574 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 [2021-11-21 00:45:16,626 INFO L354 Elim1Store]: treesize reduction 92, result has 1.1 percent of original size [2021-11-21 00:45:16,626 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 [2021-11-21 00:45:17,215 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 [2021-11-21 00:45:17,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:45:17,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:45:19,622 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 [2021-11-21 00:46:08,360 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 [2021-11-21 00:46:10,453 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-21 00:46:10,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816923902] [2021-11-21 00:46:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:10,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:46:10,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:46:10,460 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:46:10,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce61f1a-3990-4573-a0a7-310a3fbee52b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 00:46:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:10,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-21 00:46:10,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:46:10,577 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 [2021-11-21 00:46:12,339 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 00:46:12,340 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 [2021-11-21 00:46:14,484 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-21 00:46:14,484 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 48 treesize of output 65 [2021-11-21 00:46:17,065 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:46:17,066 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 [2021-11-21 00:46:20,670 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 [2021-11-21 00:46:21,619 INFO L354 Elim1Store]: treesize reduction 151, result has 12.7 percent of original size [2021-11-21 00:46:21,620 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 168 treesize of output 136 [2021-11-21 00:46:21,715 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-11-21 00:46:21,715 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 161 treesize of output 165 [2021-11-21 00:46:21,840 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 [2021-11-21 00:46:57,871 WARN L227 SmtUtils]: Spent 33.62s 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) [2021-11-21 00:46:57,872 INFO L354 Elim1Store]: treesize reduction 974, result has 6.3 percent of original size [2021-11-21 00:46:57,872 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 [2021-11-21 00:46:59,142 INFO L354 Elim1Store]: treesize reduction 499, result has 9.3 percent of original size [2021-11-21 00:46:59,143 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 [2021-11-21 00:46:59,445 INFO L354 Elim1Store]: treesize reduction 731, result has 7.0 percent of original size [2021-11-21 00:46:59,446 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 [2021-11-21 00:46:59,462 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 [2021-11-21 00:47:00,506 INFO L354 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2021-11-21 00:47:00,507 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 [2021-11-21 00:47:00,542 INFO L354 Elim1Store]: treesize reduction 92, result has 1.1 percent of original size [2021-11-21 00:47:00,542 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 [2021-11-21 00:47:01,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-21 00:47:01,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:47:01,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:18,288 WARN L227 SmtUtils]: Spent 5.62s 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) [2021-11-21 00:47:44,935 WARN L227 SmtUtils]: Spent 5.93s 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) [2021-11-21 00:47:45,864 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 [2021-11-21 00:49:37,170 WARN L227 SmtUtils]: Spent 1.86m on a formula simplification that was a NOOP. DAG size: 1421 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 00:51:29,144 WARN L227 SmtUtils]: Spent 1.86m 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) [2021-11-21 00:53:30,509 WARN L227 SmtUtils]: Spent 2.02m on a formula simplification that was a NOOP. DAG size: 1400 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)