./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8 --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 c6bee9027c6ee41df2f7df0c67f6de4e3d806cb7 .............................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8 --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 c6bee9027c6ee41df2f7df0c67f6de4e3d806cb7 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:01:28,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:01:28,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:01:28,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:01:28,348 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:01:28,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:01:28,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:01:28,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:01:28,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:01:28,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:01:28,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:01:28,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:01:28,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:01:28,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:01:28,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:01:28,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:01:28,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:01:28,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:01:28,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:01:28,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:01:28,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:01:28,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:01:28,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:01:28,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:01:28,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:01:28,381 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:01:28,382 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:01:28,383 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:01:28,383 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:01:28,384 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:01:28,385 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:01:28,386 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:01:28,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:01:28,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:01:28,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:01:28,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:01:28,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:01:28,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:01:28,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:01:28,392 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:01:28,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:01:28,394 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:01:28,419 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:01:28,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:01:28,421 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:01:28,421 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:01:28,422 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:01:28,422 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:01:28,422 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:01:28,422 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:01:28,423 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:01:28,423 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:01:28,423 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:01:28,423 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:01:28,424 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:01:28,424 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:01:28,424 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:01:28,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:01:28,425 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:01:28,425 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:01:28,425 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:01:28,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:01:28,426 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:01:28,426 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:01:28,426 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:01:28,426 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:01:28,426 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:01:28,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:01:28,427 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:01:28,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:01:28,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:01:28,427 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:01:28,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:01:28,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:01:28,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:01:28,428 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:01:28,428 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:01:28,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:01:28,429 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:01:28,429 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:01:28,429 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:01:28,429 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_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6bee9027c6ee41df2f7df0c67f6de4e3d806cb7 [2021-10-13 07:01:28,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:01:28,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:01:28,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:01:28,739 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:01:28,739 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:01:28,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2021-10-13 07:01:28,820 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/data/dd6c6fd6c/b159e0c400bc4b7481a9aaeffa9dc965/FLAGedf0f4d66 [2021-10-13 07:01:29,474 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:01:29,484 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2021-10-13 07:01:29,506 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/data/dd6c6fd6c/b159e0c400bc4b7481a9aaeffa9dc965/FLAGedf0f4d66 [2021-10-13 07:01:29,747 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/data/dd6c6fd6c/b159e0c400bc4b7481a9aaeffa9dc965 [2021-10-13 07:01:29,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:01:29,755 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:01:29,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:01:29,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:01:29,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:01:29,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:01:29" (1/1) ... [2021-10-13 07:01:29,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74139d1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:29, skipping insertion in model container [2021-10-13 07:01:29,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:01:29" (1/1) ... [2021-10-13 07:01:29,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:01:29,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:01:30,232 WARN L228 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_e09abff6-c132-4c55-9eb5-746c350d4964/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i[24046,24059] [2021-10-13 07:01:30,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:01:30,249 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:01:30,297 WARN L228 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_e09abff6-c132-4c55-9eb5-746c350d4964/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i[24046,24059] [2021-10-13 07:01:30,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:01:30,330 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:01:30,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:30 WrapperNode [2021-10-13 07:01:30,331 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:01:30,332 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:01:30,332 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:01:30,332 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:01:30,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:30" (1/1) ... [2021-10-13 07:01:30,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:30" (1/1) ... [2021-10-13 07:01:30,404 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:01:30,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:01:30,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:01:30,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:01:30,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:30" (1/1) ... [2021-10-13 07:01:30,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:30" (1/1) ... [2021-10-13 07:01:30,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:30" (1/1) ... [2021-10-13 07:01:30,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:30" (1/1) ... [2021-10-13 07:01:30,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:30" (1/1) ... [2021-10-13 07:01:30,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:30" (1/1) ... [2021-10-13 07:01:30,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:30" (1/1) ... [2021-10-13 07:01:30,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:01:30,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:01:30,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:01:30,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:01:30,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:30" (1/1) ... [2021-10-13 07:01:30,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:01:30,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:01:30,503 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:01:30,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:01:30,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:01:30,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:01:30,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:01:30,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:01:30,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:01:30,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:01:30,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:01:30,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:01:30,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:01:30,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:01:31,328 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:01:31,328 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-13 07:01:31,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:01:31 BoogieIcfgContainer [2021-10-13 07:01:31,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:01:31,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:01:31,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:01:31,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:01:31,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:01:29" (1/3) ... [2021-10-13 07:01:31,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7587e2b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:01:31, skipping insertion in model container [2021-10-13 07:01:31,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:30" (2/3) ... [2021-10-13 07:01:31,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7587e2b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:01:31, skipping insertion in model container [2021-10-13 07:01:31,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:01:31" (3/3) ... [2021-10-13 07:01:31,341 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2021-10-13 07:01:31,347 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:01:31,347 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:01:31,395 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:01:31,408 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, mConcurrency=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 [2021-10-13 07:01:31,408 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:01:31,423 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:31,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:01:31,443 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:31,443 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:01:31,444 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:31,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:31,449 INFO L82 PathProgramCache]: Analyzing trace with hash -180350524, now seen corresponding path program 1 times [2021-10-13 07:01:31,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:31,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488957463] [2021-10-13 07:01:31,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:31,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:31,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:31,621 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:31,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488957463] [2021-10-13 07:01:31,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488957463] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:31,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:31,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:01:31,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469737870] [2021-10-13 07:01:31,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:01:31,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:31,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:01:31,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:31,652 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:31,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:31,748 INFO L93 Difference]: Finished difference Result 25 states and 37 transitions. [2021-10-13 07:01:31,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:01:31,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 07:01:31,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:31,758 INFO L225 Difference]: With dead ends: 25 [2021-10-13 07:01:31,759 INFO L226 Difference]: Without dead ends: 12 [2021-10-13 07:01:31,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:31,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-13 07:01:31,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-10-13 07:01:31,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:31,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2021-10-13 07:01:31,787 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 6 [2021-10-13 07:01:31,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:31,788 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2021-10-13 07:01:31,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:31,788 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2021-10-13 07:01:31,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:01:31,789 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:31,789 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:31,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:01:31,790 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:31,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:31,794 INFO L82 PathProgramCache]: Analyzing trace with hash -143098010, now seen corresponding path program 1 times [2021-10-13 07:01:31,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:31,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880441091] [2021-10-13 07:01:31,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:31,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:31,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:31,941 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:31,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880441091] [2021-10-13 07:01:31,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880441091] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:01:31,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265554914] [2021-10-13 07:01:31,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:31,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:01:31,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:01:31,947 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:01:31,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:01:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:32,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:01:32,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:32,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:32,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:32,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265554914] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:01:32,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [775482089] [2021-10-13 07:01:32,213 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-13 07:01:32,213 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:01:32,217 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:01:32,223 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:01:32,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:01:32,256 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:01:32,260 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:01:32,261 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:01:32,262 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-13 07:01:32,266 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:01:32,270 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:01:32,271 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 07:01:32,275 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 104 [2021-10-13 07:01:32,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:01:32,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:01:32,351 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:01:32,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 07:01:32,364 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:01:32,368 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:01:32,370 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:01:32,373 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:01:32,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:01:32,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:01:32,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:01:32,429 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:01:32,432 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 89 [2021-10-13 07:01:32,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:01:32,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:101, output treesize:89 [2021-10-13 07:01:32,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:01:32,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:01:32,644 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_11| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) 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:608) 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:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) 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) [2021-10-13 07:01:32,649 INFO L168 Benchmark]: Toolchain (without parser) took 2893.54 ms. Allocated memory is still 125.8 MB. Free memory was 92.6 MB in the beginning and 61.6 MB in the end (delta: 31.1 MB). Peak memory consumption was 30.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:01:32,649 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 77.6 MB. Free memory was 37.0 MB in the beginning and 37.0 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:01:32,650 INFO L168 Benchmark]: CACSL2BoogieTranslator took 574.62 ms. Allocated memory is still 125.8 MB. Free memory was 92.4 MB in the beginning and 94.3 MB in the end (delta: -1.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:01:32,651 INFO L168 Benchmark]: Boogie Procedure Inliner took 71.95 ms. Allocated memory is still 125.8 MB. Free memory was 94.3 MB in the beginning and 92.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:01:32,651 INFO L168 Benchmark]: Boogie Preprocessor took 58.95 ms. Allocated memory is still 125.8 MB. Free memory was 92.6 MB in the beginning and 91.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:01:32,652 INFO L168 Benchmark]: RCFGBuilder took 866.41 ms. Allocated memory is still 125.8 MB. Free memory was 91.0 MB in the beginning and 67.5 MB in the end (delta: 23.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:01:32,652 INFO L168 Benchmark]: TraceAbstraction took 1315.81 ms. Allocated memory is still 125.8 MB. Free memory was 67.0 MB in the beginning and 61.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:01:32,663 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 77.6 MB. Free memory was 37.0 MB in the beginning and 37.0 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 574.62 ms. Allocated memory is still 125.8 MB. Free memory was 92.4 MB in the beginning and 94.3 MB in the end (delta: -1.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 71.95 ms. Allocated memory is still 125.8 MB. Free memory was 94.3 MB in the beginning and 92.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 58.95 ms. Allocated memory is still 125.8 MB. Free memory was 92.6 MB in the beginning and 91.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 866.41 ms. Allocated memory is still 125.8 MB. Free memory was 91.0 MB in the beginning and 67.5 MB in the end (delta: 23.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1315.81 ms. Allocated memory is still 125.8 MB. Free memory was 67.0 MB in the beginning and 61.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_11| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_11|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:01:32,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:01:35,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:01:35,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:01:35,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:01:35,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:01:35,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:01:35,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:01:35,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:01:35,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:01:35,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:01:35,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:01:35,216 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:01:35,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:01:35,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:01:35,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:01:35,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:01:35,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:01:35,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:01:35,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:01:35,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:01:35,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:01:35,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:01:35,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:01:35,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:01:35,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:01:35,240 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:01:35,240 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:01:35,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:01:35,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:01:35,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:01:35,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:01:35,245 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:01:35,246 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:01:35,247 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:01:35,248 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:01:35,249 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:01:35,250 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:01:35,250 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:01:35,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:01:35,251 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:01:35,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:01:35,253 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:01:35,278 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:01:35,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:01:35,279 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:01:35,279 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:01:35,280 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:01:35,280 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:01:35,280 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:01:35,280 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:01:35,280 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:01:35,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:01:35,281 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:01:35,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:01:35,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:01:35,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:01:35,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:01:35,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:01:35,283 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:01:35,283 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:01:35,283 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:01:35,283 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:01:35,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:01:35,284 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:01:35,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:01:35,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:01:35,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:01:35,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:01:35,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:01:35,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:01:35,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:01:35,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:01:35,286 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:01:35,286 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:01:35,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:01:35,287 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:01:35,287 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:01:35,287 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_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6bee9027c6ee41df2f7df0c67f6de4e3d806cb7 [2021-10-13 07:01:35,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:01:35,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:01:35,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:01:35,696 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:01:35,696 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:01:35,697 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2021-10-13 07:01:35,771 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/data/d237bf561/297d349c53864eb8a18bc221924e2754/FLAGbd333bddf [2021-10-13 07:01:36,372 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:01:36,373 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2021-10-13 07:01:36,393 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/data/d237bf561/297d349c53864eb8a18bc221924e2754/FLAGbd333bddf [2021-10-13 07:01:36,635 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/data/d237bf561/297d349c53864eb8a18bc221924e2754 [2021-10-13 07:01:36,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:01:36,638 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:01:36,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:01:36,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:01:36,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:01:36,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:01:36" (1/1) ... [2021-10-13 07:01:36,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@111ace48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:36, skipping insertion in model container [2021-10-13 07:01:36,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:01:36" (1/1) ... [2021-10-13 07:01:36,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:01:36,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:01:37,028 WARN L228 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_e09abff6-c132-4c55-9eb5-746c350d4964/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i[24046,24059] [2021-10-13 07:01:37,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:01:37,043 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:01:37,085 WARN L228 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_e09abff6-c132-4c55-9eb5-746c350d4964/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i[24046,24059] [2021-10-13 07:01:37,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:01:37,121 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:01:37,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:37 WrapperNode [2021-10-13 07:01:37,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:01:37,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:01:37,123 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:01:37,124 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:01:37,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:37" (1/1) ... [2021-10-13 07:01:37,148 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:37" (1/1) ... [2021-10-13 07:01:37,172 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:01:37,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:01:37,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:01:37,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:01:37,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:37" (1/1) ... [2021-10-13 07:01:37,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:37" (1/1) ... [2021-10-13 07:01:37,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:37" (1/1) ... [2021-10-13 07:01:37,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:37" (1/1) ... [2021-10-13 07:01:37,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:37" (1/1) ... [2021-10-13 07:01:37,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:37" (1/1) ... [2021-10-13 07:01:37,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:37" (1/1) ... [2021-10-13 07:01:37,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:01:37,212 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:01:37,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:01:37,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:01:37,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:37" (1/1) ... [2021-10-13 07:01:37,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:01:37,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:01:37,240 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:01:37,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:01:37,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 07:01:37,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:01:37,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:01:37,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:01:37,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:01:37,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:01:37,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 07:01:37,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:01:37,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:01:37,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:01:37,786 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:01:37,788 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-13 07:01:37,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:01:37 BoogieIcfgContainer [2021-10-13 07:01:37,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:01:37,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:01:37,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:01:37,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:01:37,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:01:36" (1/3) ... [2021-10-13 07:01:37,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e1209d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:01:37, skipping insertion in model container [2021-10-13 07:01:37,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:37" (2/3) ... [2021-10-13 07:01:37,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e1209d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:01:37, skipping insertion in model container [2021-10-13 07:01:37,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:01:37" (3/3) ... [2021-10-13 07:01:37,799 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2021-10-13 07:01:37,804 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:01:37,805 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:01:37,863 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:01:37,874 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, mConcurrency=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 [2021-10-13 07:01:37,875 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:01:37,890 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:37,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:01:37,918 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:37,919 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:37,919 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:37,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:37,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1957812527, now seen corresponding path program 1 times [2021-10-13 07:01:37,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:01:37,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [317886031] [2021-10-13 07:01:37,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:37,940 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:01:37,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:01:37,943 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:01:37,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:01:38,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:38,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:01:38,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:38,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:38,201 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:01:38,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [317886031] [2021-10-13 07:01:38,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [317886031] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:38,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:38,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:01:38,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092766839] [2021-10-13 07:01:38,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:01:38,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:01:38,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:01:38,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:01:38,223 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:38,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:38,238 INFO L93 Difference]: Finished difference Result 48 states and 71 transitions. [2021-10-13 07:01:38,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:01:38,240 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 07:01:38,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:38,247 INFO L225 Difference]: With dead ends: 48 [2021-10-13 07:01:38,247 INFO L226 Difference]: Without dead ends: 24 [2021-10-13 07:01:38,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:01:38,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-13 07:01:38,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-13 07:01:38,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:38,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2021-10-13 07:01:38,279 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 12 [2021-10-13 07:01:38,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:38,279 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2021-10-13 07:01:38,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:38,280 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2021-10-13 07:01:38,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:01:38,281 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:38,281 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:38,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:01:38,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:01:38,493 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:38,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:38,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1580862863, now seen corresponding path program 1 times [2021-10-13 07:01:38,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:01:38,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178648130] [2021-10-13 07:01:38,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:38,496 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:01:38,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:01:38,497 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:01:38,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:01:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:38,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:01:38,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:38,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:38,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:38,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:01:38,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178648130] [2021-10-13 07:01:38,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178648130] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:38,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:38,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:01:38,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483512075] [2021-10-13 07:01:38,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:01:38,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:01:38,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:01:38,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:01:38,711 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:38,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:38,756 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2021-10-13 07:01:38,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:01:38,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 07:01:38,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:38,759 INFO L225 Difference]: With dead ends: 47 [2021-10-13 07:01:38,759 INFO L226 Difference]: Without dead ends: 32 [2021-10-13 07:01:38,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:01:38,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-13 07:01:38,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-13 07:01:38,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:38,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2021-10-13 07:01:38,765 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 12 [2021-10-13 07:01:38,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:38,766 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2021-10-13 07:01:38,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:38,766 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2021-10-13 07:01:38,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 07:01:38,767 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:38,767 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:38,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:01:38,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:01:38,980 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:38,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:38,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1406565039, now seen corresponding path program 1 times [2021-10-13 07:01:38,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:01:38,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [882539068] [2021-10-13 07:01:38,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:38,983 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:01:38,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:01:38,984 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:01:38,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:01:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:39,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:01:39,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:39,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:01:39,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:39,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:01:39,389 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:01:39,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [882539068] [2021-10-13 07:01:39,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [882539068] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:39,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:39,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:01:39,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050064497] [2021-10-13 07:01:39,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:01:39,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:01:39,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:01:39,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:39,392 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:39,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:39,491 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2021-10-13 07:01:39,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:01:39,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 07:01:39,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:39,494 INFO L225 Difference]: With dead ends: 57 [2021-10-13 07:01:39,494 INFO L226 Difference]: Without dead ends: 33 [2021-10-13 07:01:39,495 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:39,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-13 07:01:39,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-10-13 07:01:39,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:39,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-10-13 07:01:39,504 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 26 [2021-10-13 07:01:39,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:39,504 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-10-13 07:01:39,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:39,505 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-10-13 07:01:39,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 07:01:39,507 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:39,507 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:39,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:01:39,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:01:39,722 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:39,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:39,723 INFO L82 PathProgramCache]: Analyzing trace with hash -282378703, now seen corresponding path program 1 times [2021-10-13 07:01:39,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:01:39,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268024830] [2021-10-13 07:01:39,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:39,724 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:01:39,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:01:39,728 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:01:39,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:01:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:39,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:01:39,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:40,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:40,164 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:01:40,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268024830] [2021-10-13 07:01:40,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268024830] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:01:40,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1142864397] [2021-10-13 07:01:40,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:40,165 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:01:40,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:01:40,169 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:01:40,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-10-13 07:01:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:40,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:01:40,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:40,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:40,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:40,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1142864397] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:01:40,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393060534] [2021-10-13 07:01:40,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:40,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:01:40,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:01:40,572 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:01:40,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 07:01:40,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:40,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:01:40,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:40,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:41,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393060534] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:01:41,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:01:41,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 6] total 10 [2021-10-13 07:01:41,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050250836] [2021-10-13 07:01:41,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:01:41,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:01:41,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:01:41,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:01:41,079 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:41,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:41,247 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2021-10-13 07:01:41,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:01:41,248 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 07:01:41,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:41,248 INFO L225 Difference]: With dead ends: 68 [2021-10-13 07:01:41,249 INFO L226 Difference]: Without dead ends: 53 [2021-10-13 07:01:41,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:01:41,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-13 07:01:41,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-10-13 07:01:41,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:41,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2021-10-13 07:01:41,256 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 26 [2021-10-13 07:01:41,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:41,257 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2021-10-13 07:01:41,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:41,257 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2021-10-13 07:01:41,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-13 07:01:41,259 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:41,259 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:41,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-10-13 07:01:41,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:01:41,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:01:41,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:01:41,860 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:41,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:41,860 INFO L82 PathProgramCache]: Analyzing trace with hash 2036506556, now seen corresponding path program 2 times [2021-10-13 07:01:41,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:01:41,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352722720] [2021-10-13 07:01:41,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:01:41,861 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:01:41,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:01:41,862 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:01:41,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 07:01:42,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:01:42,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:01:42,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:01:42,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:42,268 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 [2021-10-13 07:01:42,325 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:01:42,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-13 07:01:42,378 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-13 07:01:42,378 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 16 treesize of output 17 [2021-10-13 07:01:42,522 INFO L354 Elim1Store]: treesize reduction 156, result has 14.3 percent of original size [2021-10-13 07:01:42,522 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 4 case distinctions, treesize of input 60 treesize of output 51 [2021-10-13 07:01:42,578 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-13 07:01:42,578 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 3 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:01:42,649 INFO L354 Elim1Store]: treesize reduction 84, result has 16.8 percent of original size [2021-10-13 07:01:42,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 27 [2021-10-13 07:01:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-13 07:01:42,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:43,005 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:01:43,008 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-10-13 07:01:57,572 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:01:57,573 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-10-13 07:01:57,577 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:01:57,578 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-10-13 07:01:59,587 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_create_#t~ite7| (_ BitVec 32)) (v_DerPreprocessor_3 (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32)) (v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (store (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv16 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) |ULTIMATE.start_dll_create_#t~ite7|) (bvadd (_ bv4 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) v_DerPreprocessor_3) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_2)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_1))) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset) (_ bv0 32))) is different from false [2021-10-13 07:02:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 4 refuted. 1 times theorem prover too weak. 24 trivial. 2 not checked. [2021-10-13 07:02:00,974 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:02:00,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352722720] [2021-10-13 07:02:00,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352722720] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:02:00,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1088864170] [2021-10-13 07:02:00,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:02:00,976 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:02:00,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:02:00,980 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:02:00,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-10-13 07:02:01,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:02:01,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:02:01,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 07:02:01,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:02:01,739 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 [2021-10-13 07:02:01,785 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:02:01,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-10-13 07:02:01,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:01,850 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 0 case distinctions, treesize of input 16 treesize of output 17 [2021-10-13 07:02:01,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:01,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:01,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:01,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:01,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:01,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:01,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 51 [2021-10-13 07:02:01,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:01,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:01,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:01,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:02:01,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:02,021 INFO L354 Elim1Store]: treesize reduction 74, result has 18.7 percent of original size [2021-10-13 07:02:02,021 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 3 case distinctions, treesize of input 40 treesize of output 27 [2021-10-13 07:02:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-13 07:02:02,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:02:02,332 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:02:02,333 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-10-13 07:02:03,863 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_4 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (= (_ bv0 32) (select (select (store |c_#memory_int| c_ULTIMATE.start_dll_create_~head~0.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_4)) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset))) is different from false [2021-10-13 07:02:03,877 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:02:03,878 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-10-13 07:02:03,881 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:02:03,882 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-10-13 07:02:23,137 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 4 refuted. 2 times theorem prover too weak. 24 trivial. 1 not checked. [2021-10-13 07:02:23,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1088864170] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:02:23,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908039561] [2021-10-13 07:02:23,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:02:23,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:02:23,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:02:23,143 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:02:23,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 07:02:23,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:02:23,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:02:23,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 07:02:23,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:02:23,509 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 [2021-10-13 07:02:23,557 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:02:23,558 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 15 treesize of output 15 [2021-10-13 07:02:23,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:23,591 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 0 case distinctions, treesize of input 16 treesize of output 17 [2021-10-13 07:02:23,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:23,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:23,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:23,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:23,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:23,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:23,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 51 [2021-10-13 07:02:23,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:23,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:23,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:23,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:02:23,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:02:23,733 INFO L354 Elim1Store]: treesize reduction 74, result has 18.7 percent of original size [2021-10-13 07:02:23,734 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 3 case distinctions, treesize of input 40 treesize of output 27 [2021-10-13 07:02:23,848 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-13 07:02:23,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:02:23,904 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:02:23,905 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-10-13 07:02:39,106 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:02:39,107 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-10-13 07:02:39,110 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:02:39,111 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-10-13 07:02:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 4 refuted. 3 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-13 07:02:50,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908039561] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:02:50,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:02:50,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 12, 11, 12] total 25 [2021-10-13 07:02:50,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317762908] [2021-10-13 07:02:50,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 07:02:50,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:02:50,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 07:02:50,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=422, Unknown=17, NotChecked=86, Total=600 [2021-10-13 07:02:50,287 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:03:05,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:03:05,859 INFO L93 Difference]: Finished difference Result 88 states and 118 transitions. [2021-10-13 07:03:05,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 07:03:05,860 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-10-13 07:03:05,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:03:05,862 INFO L225 Difference]: With dead ends: 88 [2021-10-13 07:03:05,862 INFO L226 Difference]: Without dead ends: 75 [2021-10-13 07:03:05,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 251 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 74683.5ms TimeCoverageRelationStatistics Valid=252, Invalid=926, Unknown=20, NotChecked=134, Total=1332 [2021-10-13 07:03:05,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-13 07:03:05,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2021-10-13 07:03:05,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.3272727272727274) internal successors, (73), 55 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:03:05,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2021-10-13 07:03:05,871 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 47 [2021-10-13 07:03:05,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:03:05,872 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2021-10-13 07:03:05,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:03:05,873 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2021-10-13 07:03:05,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-13 07:03:05,874 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:03:05,874 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:03:05,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-10-13 07:03:06,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:03:06,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-10-13 07:03:06,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:03:06,478 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:03:06,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:03:06,478 INFO L82 PathProgramCache]: Analyzing trace with hash 2038353598, now seen corresponding path program 1 times [2021-10-13 07:03:06,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:03:06,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840090862] [2021-10-13 07:03:06,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:03:06,479 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:03:06,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:03:06,480 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:03:06,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 07:03:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:03:06,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 07:03:06,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:03:06,963 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 [2021-10-13 07:03:07,020 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:03:07,021 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 15 treesize of output 15 [2021-10-13 07:03:07,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:07,065 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 0 case distinctions, treesize of input 16 treesize of output 17 [2021-10-13 07:03:07,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:07,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:07,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:07,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:07,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:07,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:07,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 51 [2021-10-13 07:03:07,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:07,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:07,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:07,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:03:07,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:07,213 INFO L354 Elim1Store]: treesize reduction 74, result has 18.7 percent of original size [2021-10-13 07:03:07,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 27 [2021-10-13 07:03:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-13 07:03:07,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:03:07,702 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:03:07,703 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-10-13 07:03:09,494 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (= (select (select (store |c_#memory_int| c_ULTIMATE.start_dll_create_~head~0.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_10)) c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_dll_create_~new_head~0.offset)) (_ bv0 32))) is different from false [2021-10-13 07:03:09,509 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:03:09,516 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-10-13 07:03:09,519 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:03:09,520 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-10-13 07:03:11,548 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_create_#t~ite7| (_ BitVec 32)) (v_DerPreprocessor_10 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (store (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv16 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) |ULTIMATE.start_dll_create_#t~ite7|) (bvadd (_ bv4 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) v_DerPreprocessor_12) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_11)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_10))) c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_dll_create_~new_head~0.offset)) (_ bv0 32))) is different from false [2021-10-13 07:03:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 3 not checked. [2021-10-13 07:03:15,044 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:03:15,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840090862] [2021-10-13 07:03:15,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840090862] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:03:15,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [143182446] [2021-10-13 07:03:15,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:03:15,045 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:03:15,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:03:15,046 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:03:15,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-13 07:03:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:03:15,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 07:03:15,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:03:15,832 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 [2021-10-13 07:03:15,883 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:03:15,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-10-13 07:03:15,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:15,907 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 0 case distinctions, treesize of input 16 treesize of output 17 [2021-10-13 07:03:15,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:15,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:15,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:15,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:15,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:15,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:15,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 51 [2021-10-13 07:03:15,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:15,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:15,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:15,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:03:16,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:16,023 INFO L354 Elim1Store]: treesize reduction 74, result has 18.7 percent of original size [2021-10-13 07:03:16,023 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 3 case distinctions, treesize of input 40 treesize of output 27 [2021-10-13 07:03:16,134 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-13 07:03:16,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:03:16,202 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:03:16,203 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-10-13 07:03:25,123 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:03:25,128 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-10-13 07:03:25,133 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:03:25,134 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-10-13 07:03:27,159 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_create_#t~ite7| (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (store (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv16 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) |ULTIMATE.start_dll_create_#t~ite7|) (bvadd (_ bv4 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) v_DerPreprocessor_15) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_14)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_13))) c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_dll_create_~new_head~0.offset)) (_ bv0 32))) is different from false [2021-10-13 07:03:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 4 refuted. 1 times theorem prover too weak. 24 trivial. 2 not checked. [2021-10-13 07:03:27,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [143182446] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:03:27,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720517381] [2021-10-13 07:03:27,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:03:27,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:03:27,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:03:27,480 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:03:27,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 07:03:27,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:03:27,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 07:03:27,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:03:27,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:03:27,905 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:03:27,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-10-13 07:03:27,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:27,934 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 0 case distinctions, treesize of input 16 treesize of output 17 [2021-10-13 07:03:27,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:27,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:27,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:27,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:27,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:27,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:27,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 51 [2021-10-13 07:03:28,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:28,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:28,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:28,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:03:28,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:03:28,050 INFO L354 Elim1Store]: treesize reduction 74, result has 18.7 percent of original size [2021-10-13 07:03:28,050 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 3 case distinctions, treesize of input 40 treesize of output 27 [2021-10-13 07:03:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-13 07:03:28,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:03:28,212 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:03:28,213 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-10-13 07:03:30,195 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32)) (v_DerPreprocessor_16 (_ BitVec 32))) (= (select (select (store |c_#memory_int| c_ULTIMATE.start_dll_create_~head~0.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_16)) c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_dll_create_~new_head~0.offset)) (_ bv0 32))) is different from false [2021-10-13 07:03:30,209 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:03:30,210 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-10-13 07:03:30,212 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:03:30,213 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-10-13 07:03:32,234 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_create_#t~ite7| (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32)) (v_DerPreprocessor_17 (_ BitVec 32)) (v_DerPreprocessor_18 (_ BitVec 32)) (v_DerPreprocessor_16 (_ BitVec 32))) (= (_ bv0 32) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (store (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv16 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) |ULTIMATE.start_dll_create_#t~ite7|) (bvadd (_ bv4 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) v_DerPreprocessor_18) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_17)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_16))) c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_dll_create_~new_head~0.offset)))) is different from false [2021-10-13 07:03:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 3 not checked. [2021-10-13 07:03:32,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720517381] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:03:32,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:03:32,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12, 13, 12, 13] total 23 [2021-10-13 07:03:32,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238653068] [2021-10-13 07:03:32,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 07:03:32,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:03:32,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 07:03:32,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=263, Unknown=9, NotChecked=180, Total=506 [2021-10-13 07:03:32,440 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:03:46,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:03:46,679 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2021-10-13 07:03:46,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 07:03:46,680 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-10-13 07:03:46,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:03:46,681 INFO L225 Difference]: With dead ends: 90 [2021-10-13 07:03:46,682 INFO L226 Difference]: Without dead ends: 77 [2021-10-13 07:03:46,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 256 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 5 IntricatePredicates, 2 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 30144.3ms TimeCoverageRelationStatistics Valid=240, Invalid=762, Unknown=10, NotChecked=320, Total=1332 [2021-10-13 07:03:46,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-13 07:03:46,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2021-10-13 07:03:46,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 57 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:03:46,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2021-10-13 07:03:46,690 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 47 [2021-10-13 07:03:46,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:03:46,691 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2021-10-13 07:03:46,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:03:46,691 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2021-10-13 07:03:46,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-13 07:03:46,692 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:03:46,693 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:03:46,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:03:46,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:03:47,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:03:47,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:03:47,296 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:03:47,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:03:47,297 INFO L82 PathProgramCache]: Analyzing trace with hash 2038355520, now seen corresponding path program 1 times [2021-10-13 07:03:47,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:03:47,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602265135] [2021-10-13 07:03:47,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:03:47,298 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:03:47,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:03:47,299 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:03:47,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 07:03:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:03:47,901 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:03:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:03:48,239 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 07:03:48,240 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:03:48,241 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:03:48,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:03:48,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:03:48,464 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:03:48,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:03:48 BoogieIcfgContainer [2021-10-13 07:03:48,523 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:03:48,523 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:03:48,523 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:03:48,524 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:03:48,524 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:01:37" (3/4) ... [2021-10-13 07:03:48,526 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:03:48,630 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:03:48,630 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:03:48,631 INFO L168 Benchmark]: Toolchain (without parser) took 131992.83 ms. Allocated memory was 54.5 MB in the beginning and 297.8 MB in the end (delta: 243.3 MB). Free memory was 31.6 MB in the beginning and 181.8 MB in the end (delta: -150.2 MB). Peak memory consumption was 91.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:03:48,632 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 54.5 MB. Free memory is still 36.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:03:48,632 INFO L168 Benchmark]: CACSL2BoogieTranslator took 475.61 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.3 MB in the beginning and 42.5 MB in the end (delta: -11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:03:48,633 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.33 ms. Allocated memory is still 67.1 MB. Free memory was 42.5 MB in the beginning and 40.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:03:48,633 INFO L168 Benchmark]: Boogie Preprocessor took 37.73 ms. Allocated memory is still 67.1 MB. Free memory was 40.4 MB in the beginning and 38.7 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:03:48,634 INFO L168 Benchmark]: RCFGBuilder took 578.90 ms. Allocated memory is still 67.1 MB. Free memory was 38.7 MB in the beginning and 42.0 MB in the end (delta: -3.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:03:48,635 INFO L168 Benchmark]: TraceAbstraction took 130729.62 ms. Allocated memory was 67.1 MB in the beginning and 297.8 MB in the end (delta: 230.7 MB). Free memory was 41.4 MB in the beginning and 185.9 MB in the end (delta: -144.5 MB). Peak memory consumption was 87.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:03:48,636 INFO L168 Benchmark]: Witness Printer took 107.20 ms. Allocated memory is still 297.8 MB. Free memory was 185.9 MB in the beginning and 181.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:03:48,639 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 54.5 MB. Free memory is still 36.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 475.61 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.3 MB in the beginning and 42.5 MB in the end (delta: -11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.33 ms. Allocated memory is still 67.1 MB. Free memory was 42.5 MB in the beginning and 40.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.73 ms. Allocated memory is still 67.1 MB. Free memory was 40.4 MB in the beginning and 38.7 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 578.90 ms. Allocated memory is still 67.1 MB. Free memory was 38.7 MB in the beginning and 42.0 MB in the end (delta: -3.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 130729.62 ms. Allocated memory was 67.1 MB in the beginning and 297.8 MB in the end (delta: 230.7 MB). Free memory was 41.4 MB in the beginning and 185.9 MB in the end (delta: -144.5 MB). Peak memory consumption was 87.5 MB. Max. memory is 16.1 GB. * Witness Printer took 107.20 ms. Allocated memory is still 297.8 MB. Free memory was 185.9 MB in the beginning and 181.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 616]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L599] const int len = 5; [L579] DLL head = ((void *)0); [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND FALSE !(\read(head)) [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND FALSE !(len > 0) [L596] return head; [L600] DLL head = dll_create(len); [L601] head->next [L601] COND TRUE head->next [L602] EXPR head->data_0 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 [L602] EXPR head->data_1 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L602] EXPR head->data_2 [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L602] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L616] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 130601.5ms, OverallIterations: 7, TraceHistogramMax: 5, EmptinessCheckTime: 40.3ms, AutomataDifference: 30183.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 177 SDtfs, 726 SDslu, 522 SDs, 0 SdLazy, 737 SolverSat, 116 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7519.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 837 GetRequests, 740 SyntacticMatches, 14 SemanticMatches, 83 ConstructedPredicates, 7 IntricatePredicates, 3 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 105022.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=6, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 53.7ms AutomataMinimizationTime, 6 MinimizatonAttempts, 39 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 253.5ms SsaConstructionTime, 1869.2ms SatisfiabilityAnalysisTime, 93019.6ms InterpolantComputationTime, 457 NumberOfCodeBlocks, 457 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 796 ConstructedInterpolants, 18 QuantifiedInterpolants, 4062 SizeOfPredicates, 117 NumberOfNonLiveVariables, 1509 ConjunctsInSsa, 136 ConjunctsInUnsatCore, 24 InterpolantComputations, 6 PerfectInterpolantSequences, 834/972 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-13 07:03:48,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e09abff6-c132-4c55-9eb5-746c350d4964/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...