./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/sll-buckets-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-buckets-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --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 5a4c2149f6fe1f453f0ff04220f5041f2227f6654d0fa84d48205415ce284fcb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:23:11,861 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:23:12,030 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:23:12,042 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:23:12,044 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:23:12,111 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:23:12,113 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:23:12,113 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:23:12,115 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:23:12,121 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:23:12,122 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:23:12,123 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:23:12,123 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:23:12,126 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:23:12,126 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:23:12,127 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:23:12,127 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:23:12,128 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:23:12,128 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:23:12,129 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:23:12,131 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:23:12,132 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:23:12,133 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:23:12,134 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:23:12,135 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:23:12,135 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:23:12,136 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:23:12,136 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:23:12,137 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:23:12,137 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:23:12,139 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:23:12,139 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:23:12,140 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:23:12,140 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:23:12,140 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:23:12,141 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:23:12,141 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:23:12,141 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:23:12,142 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:23:12,142 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:23:12,142 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:23:12,143 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:23:12,143 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:23:12,143 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:23:12,144 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:23:12,144 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:23:12,145 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:23:12,145 INFO L153 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_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a4c2149f6fe1f453f0ff04220f5041f2227f6654d0fa84d48205415ce284fcb [2023-11-23 21:23:12,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:23:12,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:23:12,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:23:12,599 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:23:12,599 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:23:12,601 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/forester-heap/sll-buckets-2.i [2023-11-23 21:23:16,085 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:23:16,391 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:23:16,392 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/sv-benchmarks/c/forester-heap/sll-buckets-2.i [2023-11-23 21:23:16,407 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/bin/utaipan-verify-mE87zJ7Ire/data/b48bfd75c/583a953b84d646a7802c323bbd6405db/FLAGc89c7025a [2023-11-23 21:23:16,424 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/bin/utaipan-verify-mE87zJ7Ire/data/b48bfd75c/583a953b84d646a7802c323bbd6405db [2023-11-23 21:23:16,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:23:16,429 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:23:16,431 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:23:16,431 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:23:16,437 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:23:16,438 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:23:16" (1/1) ... [2023-11-23 21:23:16,439 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@be87e60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:16, skipping insertion in model container [2023-11-23 21:23:16,440 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:23:16" (1/1) ... [2023-11-23 21:23:16,496 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:23:16,816 WARN L240 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_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22663,22676] [2023-11-23 21:23:16,823 WARN L240 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_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22734,22747] [2023-11-23 21:23:16,825 WARN L240 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_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22862,22875] [2023-11-23 21:23:16,830 WARN L240 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_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23275,23288] [2023-11-23 21:23:16,831 WARN L240 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_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23364,23377] [2023-11-23 21:23:16,835 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:23:16,847 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:23:16,908 WARN L240 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_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22663,22676] [2023-11-23 21:23:16,911 WARN L240 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_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22734,22747] [2023-11-23 21:23:16,915 WARN L240 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_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22862,22875] [2023-11-23 21:23:16,929 WARN L240 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_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23275,23288] [2023-11-23 21:23:16,931 WARN L240 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_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23364,23377] [2023-11-23 21:23:16,933 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:23:16,968 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:23:16,969 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:16 WrapperNode [2023-11-23 21:23:16,969 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:23:16,971 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:23:16,971 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:23:16,971 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:23:16,980 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:16" (1/1) ... [2023-11-23 21:23:16,997 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:16" (1/1) ... [2023-11-23 21:23:17,029 INFO L138 Inliner]: procedures = 119, calls = 42, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 157 [2023-11-23 21:23:17,029 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:23:17,030 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:23:17,031 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:23:17,031 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:23:17,041 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:16" (1/1) ... [2023-11-23 21:23:17,042 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:16" (1/1) ... [2023-11-23 21:23:17,046 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:16" (1/1) ... [2023-11-23 21:23:17,047 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:16" (1/1) ... [2023-11-23 21:23:17,057 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:16" (1/1) ... [2023-11-23 21:23:17,063 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:16" (1/1) ... [2023-11-23 21:23:17,065 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:16" (1/1) ... [2023-11-23 21:23:17,067 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:16" (1/1) ... [2023-11-23 21:23:17,071 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:23:17,072 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:23:17,072 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:23:17,072 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:23:17,073 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:16" (1/1) ... [2023-11-23 21:23:17,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:23:17,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:17,104 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:23:17,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:23:17,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:23:17,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:23:17,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:23:17,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:23:17,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:23:17,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:23:17,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:23:17,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:23:17,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:23:17,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:23:17,318 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:23:17,321 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:23:17,899 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:23:18,025 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:23:18,025 INFO L309 CfgBuilder]: Removed 15 assume(true) statements. [2023-11-23 21:23:18,027 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:18 BoogieIcfgContainer [2023-11-23 21:23:18,028 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:23:18,032 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:23:18,034 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:23:18,038 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:23:18,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:23:16" (1/3) ... [2023-11-23 21:23:18,040 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de8edb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:18, skipping insertion in model container [2023-11-23 21:23:18,040 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:16" (2/3) ... [2023-11-23 21:23:18,043 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de8edb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:18, skipping insertion in model container [2023-11-23 21:23:18,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:18" (3/3) ... [2023-11-23 21:23:18,045 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-buckets-2.i [2023-11-23 21:23:18,113 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:23:18,113 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-11-23 21:23:18,189 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:23:18,197 INFO L357 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=LoopHeads, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@65c2fd25, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:23:18,197 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-23 21:23:18,202 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 31 states have (on average 1.935483870967742) internal successors, (60), 36 states have internal predecessors, (60), 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) [2023-11-23 21:23:18,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 21:23:18,210 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:18,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 21:23:18,212 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-23 21:23:18,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:18,219 INFO L85 PathProgramCache]: Analyzing trace with hash 197102061, now seen corresponding path program 1 times [2023-11-23 21:23:18,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:18,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380076807] [2023-11-23 21:23:18,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:18,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:18,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:18,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380076807] [2023-11-23 21:23:18,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380076807] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:18,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:18,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:23:18,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376164958] [2023-11-23 21:23:18,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:18,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:23:18,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:18,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:23:18,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:23:18,899 INFO L87 Difference]: Start difference. First operand has 37 states, 31 states have (on average 1.935483870967742) internal successors, (60), 36 states have internal predecessors, (60), 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 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-11-23 21:23:19,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:19,086 INFO L93 Difference]: Finished difference Result 96 states and 160 transitions. [2023-11-23 21:23:19,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:23:19,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2023-11-23 21:23:19,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:19,100 INFO L225 Difference]: With dead ends: 96 [2023-11-23 21:23:19,101 INFO L226 Difference]: Without dead ends: 59 [2023-11-23 21:23:19,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:23:19,109 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 83 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:19,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 56 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:23:19,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-23 21:23:19,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 37. [2023-11-23 21:23:19,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.303030303030303) internal successors, (43), 36 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) [2023-11-23 21:23:19,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-11-23 21:23:19,156 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 5 [2023-11-23 21:23:19,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:19,157 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-11-23 21:23:19,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-11-23 21:23:19,158 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-11-23 21:23:19,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:23:19,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:19,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:19,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:23:19,160 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-23 21:23:19,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:19,161 INFO L85 PathProgramCache]: Analyzing trace with hash 436646993, now seen corresponding path program 1 times [2023-11-23 21:23:19,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:19,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112416678] [2023-11-23 21:23:19,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:19,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:19,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:19,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:19,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112416678] [2023-11-23 21:23:19,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112416678] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:19,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:19,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:23:19,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797026651] [2023-11-23 21:23:19,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:19,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:23:19,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:19,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:23:19,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:19,285 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-11-23 21:23:19,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:19,475 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2023-11-23 21:23:19,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:23:19,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2023-11-23 21:23:19,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:19,477 INFO L225 Difference]: With dead ends: 41 [2023-11-23 21:23:19,477 INFO L226 Difference]: Without dead ends: 39 [2023-11-23 21:23:19,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:19,480 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:19,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 46 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:23:19,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-23 21:23:19,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2023-11-23 21:23:19,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.28125) internal successors, (41), 34 states have internal predecessors, (41), 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) [2023-11-23 21:23:19,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-11-23 21:23:19,490 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 7 [2023-11-23 21:23:19,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:19,491 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-11-23 21:23:19,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-11-23 21:23:19,491 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-11-23 21:23:19,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 21:23:19,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:19,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:19,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:23:19,493 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-23 21:23:19,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:19,494 INFO L85 PathProgramCache]: Analyzing trace with hash -131530089, now seen corresponding path program 1 times [2023-11-23 21:23:19,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:19,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631636560] [2023-11-23 21:23:19,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:19,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:19,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:19,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631636560] [2023-11-23 21:23:19,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631636560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:19,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:19,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:23:19,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045879604] [2023-11-23 21:23:19,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:19,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:23:19,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:19,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:23:19,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:19,704 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-11-23 21:23:19,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:19,870 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2023-11-23 21:23:19,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:23:19,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2023-11-23 21:23:19,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:19,872 INFO L225 Difference]: With dead ends: 39 [2023-11-23 21:23:19,872 INFO L226 Difference]: Without dead ends: 37 [2023-11-23 21:23:19,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:19,874 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:19,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 54 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:23:19,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-23 21:23:19,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2023-11-23 21:23:19,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 32 states have internal predecessors, (39), 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) [2023-11-23 21:23:19,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2023-11-23 21:23:19,884 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 8 [2023-11-23 21:23:19,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:19,884 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2023-11-23 21:23:19,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-11-23 21:23:19,885 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2023-11-23 21:23:19,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 21:23:19,885 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:19,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:19,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:23:19,886 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-23 21:23:19,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:19,887 INFO L85 PathProgramCache]: Analyzing trace with hash 215961798, now seen corresponding path program 1 times [2023-11-23 21:23:19,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:19,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108787573] [2023-11-23 21:23:19,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:19,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:20,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:20,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108787573] [2023-11-23 21:23:20,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108787573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:20,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:20,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:23:20,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104774291] [2023-11-23 21:23:20,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:20,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:23:20,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:20,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:23:20,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:23:20,856 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2023-11-23 21:23:21,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:21,190 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2023-11-23 21:23:21,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:23:21,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2023-11-23 21:23:21,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:21,192 INFO L225 Difference]: With dead ends: 53 [2023-11-23 21:23:21,192 INFO L226 Difference]: Without dead ends: 42 [2023-11-23 21:23:21,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:23:21,203 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:21,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 76 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:23:21,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-23 21:23:21,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2023-11-23 21:23:21,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 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) [2023-11-23 21:23:21,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-11-23 21:23:21,227 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 9 [2023-11-23 21:23:21,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:21,227 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-11-23 21:23:21,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2023-11-23 21:23:21,229 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-11-23 21:23:21,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 21:23:21,231 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:21,231 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:21,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:23:21,233 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-23 21:23:21,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:21,233 INFO L85 PathProgramCache]: Analyzing trace with hash 490076125, now seen corresponding path program 1 times [2023-11-23 21:23:21,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:21,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411351369] [2023-11-23 21:23:21,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:21,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:21,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:21,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:21,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411351369] [2023-11-23 21:23:21,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411351369] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:23:21,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447404110] [2023-11-23 21:23:21,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:21,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:21,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:21,832 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:21,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:23:22,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:22,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-23 21:23:22,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:22,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:23:22,230 INFO L349 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2023-11-23 21:23:22,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2023-11-23 21:23:22,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 28 [2023-11-23 21:23:22,278 INFO L349 Elim1Store]: treesize reduction 44, result has 10.2 percent of original size [2023-11-23 21:23:22,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 41 [2023-11-23 21:23:22,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:23:22,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 117 [2023-11-23 21:23:22,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 107 [2023-11-23 21:23:22,663 INFO L378 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 64 [2023-11-23 21:23:22,729 INFO L349 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2023-11-23 21:23:22,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 29 [2023-11-23 21:23:22,913 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:23:22,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2023-11-23 21:23:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:22,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:23:23,052 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:23:23,053 INFO L378 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 93 [2023-11-23 21:23:23,079 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:23:23,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 123 [2023-11-23 21:23:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:23,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447404110] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:23:23,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1279309117] [2023-11-23 21:23:23,248 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-23 21:23:23,249 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:23:23,255 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:23:23,262 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:23:23,263 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:23:30,354 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:23:46,731 WARN L293 SmtUtils]: Spent 9.18s on a formula simplification that was a NOOP. DAG size: 251 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-23 21:23:48,324 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '641#(and (= |ULTIMATE.start_main_~itr~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~item~0#1.offset| 0) (= |ULTIMATE.start_main_~bucket~0#1.offset| 0) (= (select (select |#memory_int| 0) 8) (select (select |#memory_int| |ULTIMATE.start_main_~item~0#1.base|) 4)) (= |ULTIMATE.start_main_~itr~0#1.base| 0) (= |ULTIMATE.start_main_~bcki~0#1.base| 0) (= |ULTIMATE.start_main_~bcki~0#1.offset| 0))' at error location [2023-11-23 21:23:48,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:23:48,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:23:48,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-23 21:23:48,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055217818] [2023-11-23 21:23:48,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:23:48,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:23:48,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:48,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:23:48,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-23 21:23:48,328 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2023-11-23 21:23:49,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:49,480 INFO L93 Difference]: Finished difference Result 140 states and 171 transitions. [2023-11-23 21:23:49,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:23:49,486 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 13 [2023-11-23 21:23:49,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:49,489 INFO L225 Difference]: With dead ends: 140 [2023-11-23 21:23:49,490 INFO L226 Difference]: Without dead ends: 138 [2023-11-23 21:23:49,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2023-11-23 21:23:49,491 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 200 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:49,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 150 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:23:49,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-23 21:23:49,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 56. [2023-11-23 21:23:49,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 55 states have internal predecessors, (67), 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) [2023-11-23 21:23:49,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2023-11-23 21:23:49,518 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 13 [2023-11-23 21:23:49,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:49,519 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2023-11-23 21:23:49,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2023-11-23 21:23:49,519 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2023-11-23 21:23:49,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-23 21:23:49,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:49,524 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:49,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:23:49,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:49,750 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-23 21:23:49,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:49,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1275912563, now seen corresponding path program 1 times [2023-11-23 21:23:49,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:49,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051905222] [2023-11-23 21:23:49,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:49,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:50,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:50,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:50,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051905222] [2023-11-23 21:23:50,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051905222] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:23:50,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657397554] [2023-11-23 21:23:50,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:50,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:50,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:50,752 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:50,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbaea8b1-0546-49e0-9ade-4ddabc3f90ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:23:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:50,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-23 21:23:50,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:50,959 INFO L378 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 36 [2023-11-23 21:23:50,968 INFO L378 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 32 [2023-11-23 21:23:51,007 INFO L349 Elim1Store]: treesize reduction 54, result has 23.9 percent of original size [2023-11-23 21:23:51,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 68 [2023-11-23 21:23:51,013 INFO L378 Elim1Store]: Elim1 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 23 treesize of output 11 [2023-11-23 21:23:51,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:23:51,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:23:51,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:23:51,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 37 [2023-11-23 21:23:51,041 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-23 21:23:51,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2023-11-23 21:23:51,048 INFO L378 Elim1Store]: Elim1 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 11 treesize of output 15 [2023-11-23 21:23:51,066 INFO L378 Elim1Store]: Elim1 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 23 treesize of output 11 [2023-11-23 21:23:51,289 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:23:51,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 43 [2023-11-23 21:23:51,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 52 [2023-11-23 21:23:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:51,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:23:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:51,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657397554] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:23:51,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [193808167] [2023-11-23 21:23:51,896 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-23 21:23:51,896 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:23:51,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:23:51,896 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:23:51,897 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:23:53,568 INFO L180 IcfgInterpreter]: Interpretation finished