./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/dll_of_dll-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-manipulation/dll_of_dll-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8 --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 0eca46c14885d62179341dcc13b398752af03e020a80dcf533f4c9afc7372707 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:08:00,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:08:00,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:08:00,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:08:00,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:08:00,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:08:00,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:08:00,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:08:00,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:08:00,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:08:00,863 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:08:00,865 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:08:00,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:08:00,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:08:00,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:08:00,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:08:00,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:08:00,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:08:00,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:08:00,878 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:08:00,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:08:00,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:08:00,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:08:00,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:08:00,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:08:00,902 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:08:00,903 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:08:00,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:08:00,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:08:00,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:08:00,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:08:00,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:08:00,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:08:00,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:08:00,916 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:08:00,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:08:00,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:08:00,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:08:00,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:08:00,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:08:00,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:08:00,923 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:08:00,971 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:08:00,971 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:08:00,972 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:08:00,973 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:08:00,973 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:08:00,973 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:08:00,973 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:08:00,974 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:08:00,980 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:08:00,980 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:08:00,981 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:08:00,982 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:08:00,982 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:08:00,982 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:08:00,983 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:08:00,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:08:00,984 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:08:00,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:08:00,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:08:00,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:08:00,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:08:00,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:08:00,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:08:00,985 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:08:00,985 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:08:00,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:08:00,986 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:08:00,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:08:00,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:08:00,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:08:00,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:08:00,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:08:00,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:08:00,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:08:00,989 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:08:00,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:08:00,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:08:00,990 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:08:00,990 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:08:00,990 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_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0eca46c14885d62179341dcc13b398752af03e020a80dcf533f4c9afc7372707 [2021-11-07 02:08:01,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:08:01,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:08:01,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:08:01,284 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:08:01,285 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:08:01,288 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/heap-manipulation/dll_of_dll-2.i [2021-11-07 02:08:01,364 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/data/95362afe7/2273f34795a849f48b53745b250c3feb/FLAG511d5d233 [2021-11-07 02:08:01,945 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:08:01,946 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/sv-benchmarks/c/heap-manipulation/dll_of_dll-2.i [2021-11-07 02:08:01,966 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/data/95362afe7/2273f34795a849f48b53745b250c3feb/FLAG511d5d233 [2021-11-07 02:08:02,249 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/data/95362afe7/2273f34795a849f48b53745b250c3feb [2021-11-07 02:08:02,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:08:02,255 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:08:02,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:08:02,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:08:02,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:08:02,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:08:02" (1/1) ... [2021-11-07 02:08:02,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ddb52bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:02, skipping insertion in model container [2021-11-07 02:08:02,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:08:02" (1/1) ... [2021-11-07 02:08:02,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:08:02,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:08:02,616 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_55c54837-0e18-4641-bea6-1e85acbee0df/sv-benchmarks/c/heap-manipulation/dll_of_dll-2.i[22634,22647] [2021-11-07 02:08:02,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:08:02,666 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:08:02,720 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_55c54837-0e18-4641-bea6-1e85acbee0df/sv-benchmarks/c/heap-manipulation/dll_of_dll-2.i[22634,22647] [2021-11-07 02:08:02,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:08:02,784 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:08:02,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:02 WrapperNode [2021-11-07 02:08:02,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:08:02,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:08:02,786 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:08:02,786 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:08:02,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:02" (1/1) ... [2021-11-07 02:08:02,814 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:02" (1/1) ... [2021-11-07 02:08:02,857 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:08:02,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:08:02,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:08:02,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:08:02,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:02" (1/1) ... [2021-11-07 02:08:02,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:02" (1/1) ... [2021-11-07 02:08:02,877 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:02" (1/1) ... [2021-11-07 02:08:02,877 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:02" (1/1) ... [2021-11-07 02:08:02,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:02" (1/1) ... [2021-11-07 02:08:02,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:02" (1/1) ... [2021-11-07 02:08:02,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:02" (1/1) ... [2021-11-07 02:08:02,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:08:02,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:08:02,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:08:02,934 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:08:02,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:02" (1/1) ... [2021-11-07 02:08:02,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:08:02,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:02,995 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:08:03,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:08:03,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:08:03,039 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_master [2021-11-07 02:08:03,039 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_master [2021-11-07 02:08:03,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:08:03,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:08:03,040 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 02:08:03,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 02:08:03,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:08:03,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:08:03,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 02:08:03,040 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_generic [2021-11-07 02:08:03,041 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_generic [2021-11-07 02:08:03,041 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_slave [2021-11-07 02:08:03,041 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_slave [2021-11-07 02:08:03,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 02:08:03,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:08:03,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:08:04,311 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:08:04,311 INFO L299 CfgBuilder]: Removed 148 assume(true) statements. [2021-11-07 02:08:04,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:08:04 BoogieIcfgContainer [2021-11-07 02:08:04,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:08:04,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:08:04,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:08:04,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:08:04,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:08:02" (1/3) ... [2021-11-07 02:08:04,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fffef37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:08:04, skipping insertion in model container [2021-11-07 02:08:04,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:02" (2/3) ... [2021-11-07 02:08:04,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fffef37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:08:04, skipping insertion in model container [2021-11-07 02:08:04,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:08:04" (3/3) ... [2021-11-07 02:08:04,325 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_of_dll-2.i [2021-11-07 02:08:04,347 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:08:04,347 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2021-11-07 02:08:04,390 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:08:04,396 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:08:04,396 INFO L340 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2021-11-07 02:08:04,419 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 133 states have (on average 1.887218045112782) internal successors, (251), 161 states have internal predecessors, (251), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 02:08:04,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 02:08:04,425 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:04,426 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:04,426 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 23 more)] === [2021-11-07 02:08:04,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:04,432 INFO L85 PathProgramCache]: Analyzing trace with hash 393272608, now seen corresponding path program 1 times [2021-11-07 02:08:04,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:08:04,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048482284] [2021-11-07 02:08:04,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:04,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:08:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:04,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:08:04,678 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:08:04,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048482284] [2021-11-07 02:08:04,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048482284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:04,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:04,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 02:08:04,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934952312] [2021-11-07 02:08:04,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:08:04,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:08:04,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:08:04,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:08:04,720 INFO L87 Difference]: Start difference. First operand has 171 states, 133 states have (on average 1.887218045112782) internal successors, (251), 161 states have internal predecessors, (251), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 02:08:04,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:04,781 INFO L93 Difference]: Finished difference Result 340 states and 534 transitions. [2021-11-07 02:08:04,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:08:04,783 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 19 [2021-11-07 02:08:04,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:04,798 INFO L225 Difference]: With dead ends: 340 [2021-11-07 02:08:04,799 INFO L226 Difference]: Without dead ends: 169 [2021-11-07 02:08:04,802 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:08:04,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-07 02:08:04,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-11-07 02:08:04,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 132 states have (on average 1.2803030303030303) internal successors, (169), 159 states have internal predecessors, (169), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 02:08:04,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 183 transitions. [2021-11-07 02:08:04,847 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 183 transitions. Word has length 19 [2021-11-07 02:08:04,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:04,848 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 183 transitions. [2021-11-07 02:08:04,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 02:08:04,849 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 183 transitions. [2021-11-07 02:08:04,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 02:08:04,851 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:04,851 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:04,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 02:08:04,852 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 23 more)] === [2021-11-07 02:08:04,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:04,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2008883332, now seen corresponding path program 1 times [2021-11-07 02:08:04,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:08:04,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678184425] [2021-11-07 02:08:04,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:04,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:08:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:05,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:08:05,065 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:08:05,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678184425] [2021-11-07 02:08:05,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678184425] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:05,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:05,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 02:08:05,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700902189] [2021-11-07 02:08:05,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:08:05,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:08:05,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:08:05,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:08:05,072 INFO L87 Difference]: Start difference. First operand 169 states and 183 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 02:08:05,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:05,479 INFO L93 Difference]: Finished difference Result 196 states and 220 transitions. [2021-11-07 02:08:05,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:08:05,480 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2021-11-07 02:08:05,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:05,483 INFO L225 Difference]: With dead ends: 196 [2021-11-07 02:08:05,484 INFO L226 Difference]: Without dead ends: 194 [2021-11-07 02:08:05,485 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:08:05,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-07 02:08:05,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 177. [2021-11-07 02:08:05,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 138 states have (on average 1.2753623188405796) internal successors, (176), 164 states have internal predecessors, (176), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-07 02:08:05,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 195 transitions. [2021-11-07 02:08:05,504 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 195 transitions. Word has length 20 [2021-11-07 02:08:05,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:05,505 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 195 transitions. [2021-11-07 02:08:05,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 02:08:05,505 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 195 transitions. [2021-11-07 02:08:05,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 02:08:05,507 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:05,507 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:05,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 02:08:05,508 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 23 more)] === [2021-11-07 02:08:05,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:05,508 INFO L85 PathProgramCache]: Analyzing trace with hash 574916028, now seen corresponding path program 1 times [2021-11-07 02:08:05,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:08:05,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911607614] [2021-11-07 02:08:05,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:05,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:08:05,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:08:05,717 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:08:05,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911607614] [2021-11-07 02:08:05,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911607614] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:08:05,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366715333] [2021-11-07 02:08:05,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:05,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:05,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:05,722 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:05,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 02:08:05,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:05,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 02:08:05,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:06,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:08:06,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:08:06,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366715333] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:06,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-11-07 02:08:06,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5] total 6 [2021-11-07 02:08:06,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361646609] [2021-11-07 02:08:06,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:08:06,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:08:06,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:08:06,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:08:06,649 INFO L87 Difference]: Start difference. First operand 177 states and 195 transitions. Second operand has 6 states, 4 states have (on average 4.25) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 02:08:06,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:06,768 INFO L93 Difference]: Finished difference Result 356 states and 405 transitions. [2021-11-07 02:08:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:08:06,768 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 4.25) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 23 [2021-11-07 02:08:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:06,770 INFO L225 Difference]: With dead ends: 356 [2021-11-07 02:08:06,771 INFO L226 Difference]: Without dead ends: 181 [2021-11-07 02:08:06,772 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:08:06,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-07 02:08:06,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-11-07 02:08:06,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 139 states have (on average 1.2733812949640289) internal successors, (177), 166 states have internal predecessors, (177), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-07 02:08:06,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 197 transitions. [2021-11-07 02:08:06,797 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 197 transitions. Word has length 23 [2021-11-07 02:08:06,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:06,797 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 197 transitions. [2021-11-07 02:08:06,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 4.25) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 02:08:06,798 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 197 transitions. [2021-11-07 02:08:06,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:08:06,800 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:06,800 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:06,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:07,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:07,029 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 23 more)] === [2021-11-07 02:08:07,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:07,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1430679642, now seen corresponding path program 1 times [2021-11-07 02:08:07,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:08:07,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610485425] [2021-11-07 02:08:07,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:07,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:08:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-07 02:08:07,215 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:08:07,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610485425] [2021-11-07 02:08:07,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610485425] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:08:07,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270645047] [2021-11-07 02:08:07,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:07,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:07,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:07,218 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:07,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 02:08:07,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:07,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-07 02:08:07,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:07,704 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-07 02:08:07,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 31 [2021-11-07 02:08:07,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-07 02:08:07,798 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-07 02:08:07,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:08,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 78 [2021-11-07 02:08:08,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 74 [2021-11-07 02:08:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-07 02:08:08,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270645047] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:08,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1263971816] [2021-11-07 02:08:08,585 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-07 02:08:08,585 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 02:08:08,594 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) 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:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-07 02:08:08,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 02:08:08,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 12 [2021-11-07 02:08:08,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940021715] [2021-11-07 02:08:08,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:08:08,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:08:08,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:08:08,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:08:08,602 INFO L87 Difference]: Start difference. First operand 181 states and 197 transitions. Second operand has 12 states, 9 states have (on average 3.0) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (10), 1 states have call predecessors, (10), 4 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-07 02:08:09,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:09,219 INFO L93 Difference]: Finished difference Result 187 states and 205 transitions. [2021-11-07 02:08:09,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:08:09,220 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.0) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (10), 1 states have call predecessors, (10), 4 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) Word has length 66 [2021-11-07 02:08:09,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:09,228 INFO L225 Difference]: With dead ends: 187 [2021-11-07 02:08:09,228 INFO L226 Difference]: Without dead ends: 185 [2021-11-07 02:08:09,229 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:08:09,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-07 02:08:09,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 179. [2021-11-07 02:08:09,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 138 states have (on average 1.2681159420289856) internal successors, (175), 164 states have internal predecessors, (175), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-07 02:08:09,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 195 transitions. [2021-11-07 02:08:09,257 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 195 transitions. Word has length 66 [2021-11-07 02:08:09,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:09,258 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 195 transitions. [2021-11-07 02:08:09,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.0) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (10), 1 states have call predecessors, (10), 4 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-07 02:08:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 195 transitions. [2021-11-07 02:08:09,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:08:09,268 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:09,269 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:09,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:09,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:09,481 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 23 more)] === [2021-11-07 02:08:09,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:09,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1884105562, now seen corresponding path program 1 times [2021-11-07 02:08:09,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:08:09,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060129738] [2021-11-07 02:08:09,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:09,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:08:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:30,954 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 02:08:30,954 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:08:30,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060129738] [2021-11-07 02:08:30,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060129738] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:08:30,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243753704] [2021-11-07 02:08:30,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:30,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:30,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:30,960 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:30,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c54837-0e18-4641-bea6-1e85acbee0df/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 02:08:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:31,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 205 conjunts are in the unsatisfiable core [2021-11-07 02:08:31,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:31,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:08:32,274 INFO L354 Elim1Store]: treesize reduction 89, result has 23.9 percent of original size [2021-11-07 02:08:32,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 50 [2021-11-07 02:08:32,477 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-07 02:08:32,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 57 [2021-11-07 02:08:33,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 34 [2021-11-07 02:08:33,047 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-11-07 02:08:33,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 37 [2021-11-07 02:08:33,175 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:08:33,177 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-07 02:08:46,664 WARN L207 SmtUtils]: Spent 13.23 s on a formula simplification that was a NOOP. DAG size: 49 [2021-11-07 02:08:46,964 INFO L354 Elim1Store]: treesize reduction 698, result has 20.4 percent of original size [2021-11-07 02:08:46,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 948 treesize of output 673 [2021-11-07 02:08:47,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 641 treesize of output 639 [2021-11-07 02:08:47,324 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-11-07 02:08:47,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 76 [2021-11-07 02:08:47,560 INFO L354 Elim1Store]: treesize reduction 18, result has 58.1 percent of original size [2021-11-07 02:08:47,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 170 treesize of output 107 [2021-11-07 02:08:47,573 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-11-07 02:08:47,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 170 treesize of output 83 [2021-11-07 02:08:47,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:08:47,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 59 [2021-11-07 02:08:47,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-07 02:08:47,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 02:08:47,850 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:08:47,851 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 129 [2021-11-07 02:08:57,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 530 treesize of output 510 [2021-11-07 02:08:57,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2021-11-07 02:08:57,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 02:08:57,712 INFO L354 Elim1Store]: treesize reduction 31, result has 48.3 percent of original size [2021-11-07 02:08:57,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 278 [2021-11-07 02:08:57,762 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:08:57,763 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 02:08:57,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:08:57,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 67 [2021-11-07 02:08:57,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 157 [2021-11-07 02:09:00,271 WARN L860 $PredicateComparison]: unable to prove that (exists ((|##fun~$Pointer$~TO~VOID_dll_insert_slave_~item~0.base| Int)) (and (< |##fun~$Pointer$~TO~VOID_dll_insert_slave_~item~0.base| |c_#StackHeapBarrier|) (or (exists ((v_arrayElimCell_34 Int)) (let ((.cse3 (select |c_old(#memory_$Pointer$.base)| |##fun~$Pointer$~TO~VOID_dll_insert_slave_~item~0.base|))) (let ((.cse0 (select (select (store |c_old(#memory_$Pointer$.base)| |##fun~$Pointer$~TO~VOID_dll_insert_slave_~item~0.base| (store .cse3 0 0)) |c_##fun~$Pointer$~TO~VOID_#in~12.base|) |c_##fun~$Pointer$~TO~VOID_#in~12.offset|))) (and (or (not (= v_arrayElimCell_34 0)) (not (= .cse0 0))) (= |c_#memory_$Pointer$.base| (let ((.cse1 (let ((.cse2 (store |c_old(#memory_$Pointer$.base)| |##fun~$Pointer$~TO~VOID_dll_insert_slave_~item~0.base| (store .cse3 0 .cse0)))) (store .cse2 .cse0 (store (select .cse2 .cse0) (+ 4 v_arrayElimCell_34) |##fun~$Pointer$~TO~VOID_dll_insert_slave_~item~0.base|))))) (store .cse1 |c_##fun~$Pointer$~TO~VOID_#in~12.base| (store (select .cse1 |c_##fun~$Pointer$~TO~VOID_#in~12.base|) |c_##fun~$Pointer$~TO~VOID_#in~12.offset| |##fun~$Pointer$~TO~VOID_dll_insert_slave_~item~0.base|)))))))) (let ((.cse5 (select |c_old(#memory_$Pointer$.base)| |##fun~$Pointer$~TO~VOID_dll_insert_slave_~item~0.base|))) (let ((.cse6 (select (select (store |c_old(#memory_$Pointer$.base)| |##fun~$Pointer$~TO~VOID_dll_insert_slave_~item~0.base| (store .cse5 0 0)) |c_##fun~$Pointer$~TO~VOID_#in~12.base|) |c_##fun~$Pointer$~TO~VOID_#in~12.offset|))) (and (= (let ((.cse4 (store |c_old(#memory_$Pointer$.base)| |##fun~$Pointer$~TO~VOID_dll_insert_slave_~item~0.base| (store .cse5 0 .cse6)))) (store .cse4 |c_##fun~$Pointer$~TO~VOID_#in~12.base| (store (select .cse4 |c_##fun~$Pointer$~TO~VOID_#in~12.base|) |c_##fun~$Pointer$~TO~VOID_#in~12.offset| |##fun~$Pointer$~TO~VOID_dll_insert_slave_~item~0.base|))) |c_#memory_$Pointer$.base|) (= .cse6 0))))))) is different from true