./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1b81f923e96224472f8219a473f794261ff02356a47c6b09b527f0fc600725a8 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 04:29:25,267 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 04:29:25,357 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-09 04:29:25,364 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 04:29:25,365 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 04:29:25,407 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 04:29:25,408 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 04:29:25,408 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 04:29:25,409 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 04:29:25,411 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 04:29:25,411 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 04:29:25,412 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 04:29:25,412 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 04:29:25,413 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 04:29:25,413 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 04:29:25,413 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 04:29:25,414 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 04:29:25,414 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 04:29:25,415 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 04:29:25,415 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 04:29:25,421 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 04:29:25,422 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 04:29:25,423 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 04:29:25,423 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 04:29:25,424 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 04:29:25,424 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 04:29:25,424 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 04:29:25,425 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 04:29:25,426 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 04:29:25,426 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 04:29:25,427 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 04:29:25,427 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 04:29:25,428 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 04:29:25,429 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 04:29:25,429 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 04:29:25,429 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 04:29:25,430 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 04:29:25,430 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 04:29:25,430 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 04:29:25,431 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 04:29:25,431 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 04:29:25,432 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:29:25,432 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 04:29:25,432 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 04:29:25,432 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 04:29:25,433 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 04:29:25,433 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 04:29:25,434 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 04:29:25,434 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 04:29:25,434 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_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b81f923e96224472f8219a473f794261ff02356a47c6b09b527f0fc600725a8 [2024-11-09 04:29:25,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 04:29:25,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 04:29:25,867 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 04:29:25,868 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 04:29:25,869 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 04:29:25,870 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i Unable to find full path for "g++" [2024-11-09 04:29:27,932 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 04:29:28,213 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 04:29:28,214 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/sv-benchmarks/c/list-simple/dll2c_insert_unequal.i [2024-11-09 04:29:28,234 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/data/654cd8c9a/b8ac9bb2a409467da9b70560fea57354/FLAG522f188ed [2024-11-09 04:29:28,253 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/data/654cd8c9a/b8ac9bb2a409467da9b70560fea57354 [2024-11-09 04:29:28,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 04:29:28,257 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 04:29:28,259 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 04:29:28,260 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 04:29:28,267 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 04:29:28,268 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,269 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e9a35eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28, skipping insertion in model container [2024-11-09 04:29:28,269 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,328 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 04:29:28,753 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:29:28,769 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 04:29:28,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:29:28,881 INFO L204 MainTranslator]: Completed translation [2024-11-09 04:29:28,881 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28 WrapperNode [2024-11-09 04:29:28,881 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 04:29:28,883 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 04:29:28,883 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 04:29:28,883 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 04:29:28,892 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,914 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,946 INFO L138 Inliner]: procedures = 127, calls = 59, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 190 [2024-11-09 04:29:28,947 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 04:29:28,948 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 04:29:28,948 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 04:29:28,948 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 04:29:28,958 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,958 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,962 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,963 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,974 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,978 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,980 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,982 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:28,987 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 04:29:28,994 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 04:29:28,994 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 04:29:28,994 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 04:29:28,995 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28" (1/1) ... [2024-11-09 04:29:29,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:29:29,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:29,047 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 04:29:29,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 04:29:29,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 04:29:29,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 04:29:29,084 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-09 04:29:29,084 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-09 04:29:29,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 04:29:29,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 04:29:29,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 04:29:29,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-09 04:29:29,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-09 04:29:29,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 04:29:29,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-09 04:29:29,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 04:29:29,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 04:29:29,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 04:29:29,235 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 04:29:29,241 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 04:29:29,867 INFO L? ?]: Removed 201 outVars from TransFormulas that were not future-live. [2024-11-09 04:29:29,867 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 04:29:29,957 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 04:29:29,960 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-09 04:29:29,960 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:29:29 BoogieIcfgContainer [2024-11-09 04:29:29,960 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 04:29:29,963 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 04:29:29,964 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 04:29:29,967 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 04:29:29,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:29:28" (1/3) ... [2024-11-09 04:29:29,969 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1718ed4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:29:29, skipping insertion in model container [2024-11-09 04:29:29,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:28" (2/3) ... [2024-11-09 04:29:29,970 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1718ed4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:29:29, skipping insertion in model container [2024-11-09 04:29:29,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:29:29" (3/3) ... [2024-11-09 04:29:29,971 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_insert_unequal.i [2024-11-09 04:29:29,990 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 04:29:29,990 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 82 error locations. [2024-11-09 04:29:30,049 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 04:29:30,055 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@57fb0ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 04:29:30,056 INFO L334 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2024-11-09 04:29:30,061 INFO L276 IsEmpty]: Start isEmpty. Operand has 161 states, 74 states have (on average 2.3783783783783785) internal successors, (176), 156 states have internal predecessors, (176), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:29:30,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-09 04:29:30,074 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:30,075 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-09 04:29:30,075 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:29:30,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:30,082 INFO L85 PathProgramCache]: Analyzing trace with hash 312407480, now seen corresponding path program 1 times [2024-11-09 04:29:30,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:30,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178685849] [2024-11-09 04:29:30,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:30,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:29:30,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:30,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178685849] [2024-11-09 04:29:30,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178685849] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:30,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:29:30,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:29:30,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798705838] [2024-11-09 04:29:30,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:30,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:29:30,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:30,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:29:30,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:29:30,453 INFO L87 Difference]: Start difference. First operand has 161 states, 74 states have (on average 2.3783783783783785) internal successors, (176), 156 states have internal predecessors, (176), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:30,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:30,681 INFO L93 Difference]: Finished difference Result 157 states and 174 transitions. [2024-11-09 04:29:30,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:29:30,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-09 04:29:30,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:30,693 INFO L225 Difference]: With dead ends: 157 [2024-11-09 04:29:30,693 INFO L226 Difference]: Without dead ends: 155 [2024-11-09 04:29:30,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:29:30,698 INFO L432 NwaCegarLoop]: 150 mSDtfsCounter, 2 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:30,700 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 239 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:29:30,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-09 04:29:30,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2024-11-09 04:29:30,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 72 states have (on average 2.2916666666666665) internal successors, (165), 150 states have internal predecessors, (165), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:29:30,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 171 transitions. [2024-11-09 04:29:30,747 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 171 transitions. Word has length 5 [2024-11-09 04:29:30,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:30,748 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 171 transitions. [2024-11-09 04:29:30,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:30,749 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 171 transitions. [2024-11-09 04:29:30,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-09 04:29:30,749 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:30,749 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-09 04:29:30,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 04:29:30,750 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:29:30,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:30,751 INFO L85 PathProgramCache]: Analyzing trace with hash 312407481, now seen corresponding path program 1 times [2024-11-09 04:29:30,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:30,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595621295] [2024-11-09 04:29:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:30,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:29:30,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:30,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595621295] [2024-11-09 04:29:30,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595621295] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:30,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:29:30,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:29:30,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023656138] [2024-11-09 04:29:30,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:30,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:29:30,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:30,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:29:30,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:29:30,952 INFO L87 Difference]: Start difference. First operand 155 states and 171 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:31,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:31,146 INFO L93 Difference]: Finished difference Result 152 states and 168 transitions. [2024-11-09 04:29:31,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:29:31,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-09 04:29:31,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:31,148 INFO L225 Difference]: With dead ends: 152 [2024-11-09 04:29:31,148 INFO L226 Difference]: Without dead ends: 152 [2024-11-09 04:29:31,148 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:29:31,150 INFO L432 NwaCegarLoop]: 149 mSDtfsCounter, 2 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:31,150 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 243 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:29:31,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-09 04:29:31,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2024-11-09 04:29:31,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 72 states have (on average 2.25) internal successors, (162), 147 states have internal predecessors, (162), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:29:31,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 168 transitions. [2024-11-09 04:29:31,161 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 168 transitions. Word has length 5 [2024-11-09 04:29:31,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:31,162 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 168 transitions. [2024-11-09 04:29:31,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:31,162 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 168 transitions. [2024-11-09 04:29:31,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 04:29:31,163 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:31,163 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:31,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 04:29:31,164 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:29:31,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:31,164 INFO L85 PathProgramCache]: Analyzing trace with hash 693187719, now seen corresponding path program 1 times [2024-11-09 04:29:31,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:31,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895860491] [2024-11-09 04:29:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:31,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:29:31,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:31,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895860491] [2024-11-09 04:29:31,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895860491] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:31,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:29:31,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:29:31,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205657439] [2024-11-09 04:29:31,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:31,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:29:31,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:31,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:29:31,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:29:31,252 INFO L87 Difference]: Start difference. First operand 152 states and 168 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 04:29:31,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:31,315 INFO L93 Difference]: Finished difference Result 164 states and 182 transitions. [2024-11-09 04:29:31,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:29:31,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-11-09 04:29:31,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:31,317 INFO L225 Difference]: With dead ends: 164 [2024-11-09 04:29:31,317 INFO L226 Difference]: Without dead ends: 164 [2024-11-09 04:29:31,318 INFO L431 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 [2024-11-09 04:29:31,319 INFO L432 NwaCegarLoop]: 149 mSDtfsCounter, 11 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:31,320 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 294 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:29:31,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-11-09 04:29:31,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 154. [2024-11-09 04:29:31,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 74 states have (on average 2.2162162162162162) internal successors, (164), 149 states have internal predecessors, (164), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:29:31,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 170 transitions. [2024-11-09 04:29:31,335 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 170 transitions. Word has length 11 [2024-11-09 04:29:31,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:31,336 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 170 transitions. [2024-11-09 04:29:31,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 04:29:31,336 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 170 transitions. [2024-11-09 04:29:31,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-09 04:29:31,339 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:31,340 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:31,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 04:29:31,340 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:29:31,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:31,345 INFO L85 PathProgramCache]: Analyzing trace with hash 258600230, now seen corresponding path program 1 times [2024-11-09 04:29:31,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:31,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557692936] [2024-11-09 04:29:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:31,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:31,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 04:29:31,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:31,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557692936] [2024-11-09 04:29:31,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557692936] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:31,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:29:31,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:29:31,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64761944] [2024-11-09 04:29:31,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:31,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:29:31,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:31,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:29:31,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:29:31,726 INFO L87 Difference]: Start difference. First operand 154 states and 170 transitions. Second operand has 6 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:29:32,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:32,107 INFO L93 Difference]: Finished difference Result 153 states and 169 transitions. [2024-11-09 04:29:32,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:29:32,109 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-11-09 04:29:32,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:32,110 INFO L225 Difference]: With dead ends: 153 [2024-11-09 04:29:32,111 INFO L226 Difference]: Without dead ends: 153 [2024-11-09 04:29:32,111 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:29:32,114 INFO L432 NwaCegarLoop]: 142 mSDtfsCounter, 7 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:32,115 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 467 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:29:32,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-11-09 04:29:32,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2024-11-09 04:29:32,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 74 states have (on average 2.2027027027027026) internal successors, (163), 148 states have internal predecessors, (163), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:29:32,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 169 transitions. [2024-11-09 04:29:32,126 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 169 transitions. Word has length 20 [2024-11-09 04:29:32,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:32,127 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 169 transitions. [2024-11-09 04:29:32,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:29:32,127 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 169 transitions. [2024-11-09 04:29:32,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-09 04:29:32,128 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:32,128 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:32,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 04:29:32,130 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:29:32,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:32,131 INFO L85 PathProgramCache]: Analyzing trace with hash 258600231, now seen corresponding path program 1 times [2024-11-09 04:29:32,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:32,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682879950] [2024-11-09 04:29:32,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:32,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:32,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:29:32,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:32,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682879950] [2024-11-09 04:29:32,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682879950] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:32,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:29:32,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:29:32,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52440356] [2024-11-09 04:29:32,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:32,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:29:32,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:32,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:29:32,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:29:32,447 INFO L87 Difference]: Start difference. First operand 153 states and 169 transitions. Second operand has 6 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:29:32,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:32,792 INFO L93 Difference]: Finished difference Result 152 states and 168 transitions. [2024-11-09 04:29:32,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:29:32,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-11-09 04:29:32,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:32,794 INFO L225 Difference]: With dead ends: 152 [2024-11-09 04:29:32,794 INFO L226 Difference]: Without dead ends: 152 [2024-11-09 04:29:32,794 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:29:32,795 INFO L432 NwaCegarLoop]: 142 mSDtfsCounter, 6 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:32,796 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 491 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:29:32,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-09 04:29:32,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2024-11-09 04:29:32,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 74 states have (on average 2.189189189189189) internal successors, (162), 147 states have internal predecessors, (162), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:29:32,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 168 transitions. [2024-11-09 04:29:32,815 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 168 transitions. Word has length 20 [2024-11-09 04:29:32,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:32,816 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 168 transitions. [2024-11-09 04:29:32,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:29:32,816 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 168 transitions. [2024-11-09 04:29:32,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 04:29:32,819 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:32,819 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:32,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 04:29:32,820 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:29:32,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:32,821 INFO L85 PathProgramCache]: Analyzing trace with hash -593282425, now seen corresponding path program 1 times [2024-11-09 04:29:32,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:32,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605463710] [2024-11-09 04:29:32,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:32,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:29:33,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:33,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605463710] [2024-11-09 04:29:33,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605463710] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:33,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631248510] [2024-11-09 04:29:33,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:33,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:33,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:33,211 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:33,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 04:29:33,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:33,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 04:29:33,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:33,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:29:33,517 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-09 04:29:33,617 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-09 04:29:33,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-09 04:29:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2024-11-09 04:29:33,635 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:33,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631248510] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:33,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1053478874] [2024-11-09 04:29:33,753 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 04:29:33,753 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:33,758 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:29:33,765 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:29:33,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:29:35,387 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 155 for LOIs [2024-11-09 04:29:36,114 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:29:50,552 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1819#(and (not (= 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0))) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (exists ((|v_#memory_int_87| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_87| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select |v_#memory_int_87| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0 (select (select |#memory_int| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0))))) (exists ((|v_#memory_$Pointer$.offset_116| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_116| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select |v_#memory_$Pointer$.offset_116| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0 0)))) (= 2 |ULTIMATE.start_dll_circular_create_~len#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 4 (select |#length| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) (not (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0)) 1)) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (exists ((|v_#memory_$Pointer$.base_116| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_116| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select |v_#memory_$Pointer$.base_116| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0))) |#memory_$Pointer$.base|)) (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_dll_circular_create_~data#1| 1))' at error location [2024-11-09 04:29:50,552 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:29:50,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:29:50,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2024-11-09 04:29:50,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834296933] [2024-11-09 04:29:50,553 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:29:50,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 04:29:50,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:50,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 04:29:50,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=476, Unknown=3, NotChecked=44, Total=600 [2024-11-09 04:29:50,555 INFO L87 Difference]: Start difference. First operand 152 states and 168 transitions. Second operand has 11 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:29:51,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:51,758 INFO L93 Difference]: Finished difference Result 157 states and 176 transitions. [2024-11-09 04:29:51,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:29:51,758 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-11-09 04:29:51,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:51,759 INFO L225 Difference]: With dead ends: 157 [2024-11-09 04:29:51,759 INFO L226 Difference]: Without dead ends: 157 [2024-11-09 04:29:51,760 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=91, Invalid=560, Unknown=3, NotChecked=48, Total=702 [2024-11-09 04:29:51,764 INFO L432 NwaCegarLoop]: 139 mSDtfsCounter, 2 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:51,765 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 607 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 537 Invalid, 0 Unknown, 171 Unchecked, 1.0s Time] [2024-11-09 04:29:51,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-09 04:29:51,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2024-11-09 04:29:51,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 78 states have (on average 2.1538461538461537) internal successors, (168), 151 states have internal predecessors, (168), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 04:29:51,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 176 transitions. [2024-11-09 04:29:51,779 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 176 transitions. Word has length 22 [2024-11-09 04:29:51,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:51,780 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 176 transitions. [2024-11-09 04:29:51,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:29:51,780 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 176 transitions. [2024-11-09 04:29:51,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 04:29:51,780 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:51,781 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:51,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 04:29:51,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 04:29:51,982 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:29:51,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:51,982 INFO L85 PathProgramCache]: Analyzing trace with hash -593282424, now seen corresponding path program 1 times [2024-11-09 04:29:51,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:51,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105560326] [2024-11-09 04:29:51,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:51,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:29:52,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:52,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105560326] [2024-11-09 04:29:52,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105560326] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:52,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684968198] [2024-11-09 04:29:52,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:52,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:52,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:52,860 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:52,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 04:29:52,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:52,988 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 04:29:52,990 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:53,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:29:53,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 04:29:53,178 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-09 04:29:53,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:29:53,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 04:29:53,262 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 04:29:53,262 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 11 treesize of output 11 [2024-11-09 04:29:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2024-11-09 04:29:53,291 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:53,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684968198] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:53,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [754342242] [2024-11-09 04:29:53,542 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 04:29:53,543 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:53,543 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:29:53,543 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:29:53,544 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:29:54,392 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 155 for LOIs [2024-11-09 04:29:55,029 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:30:09,414 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2242#(and (not (= 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0))) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (<= 1 |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_130| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_130| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select |v_#memory_$Pointer$.base_130| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0))) |#memory_$Pointer$.base|)) (exists ((|v_#memory_$Pointer$.offset_130| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_130| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select |v_#memory_$Pointer$.offset_130| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0 0)))) (exists ((|v_#memory_int_101| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_101| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select |v_#memory_int_101| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0 (select (select |#memory_int| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0))))) (= 2 |ULTIMATE.start_dll_circular_create_~len#1|) (<= (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0)) 7) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 4 (select |#length| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_dll_circular_create_~data#1| 1))' at error location [2024-11-09 04:30:09,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:30:09,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:30:09,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2024-11-09 04:30:09,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351221329] [2024-11-09 04:30:09,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:09,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 04:30:09,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:09,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 04:30:09,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=569, Unknown=3, NotChecked=48, Total=702 [2024-11-09 04:30:09,416 INFO L87 Difference]: Start difference. First operand 157 states and 176 transitions. Second operand has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:30:10,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:10,766 INFO L93 Difference]: Finished difference Result 157 states and 175 transitions. [2024-11-09 04:30:10,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 04:30:10,766 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-11-09 04:30:10,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:10,767 INFO L225 Difference]: With dead ends: 157 [2024-11-09 04:30:10,767 INFO L226 Difference]: Without dead ends: 157 [2024-11-09 04:30:10,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=96, Invalid=661, Unknown=3, NotChecked=52, Total=812 [2024-11-09 04:30:10,768 INFO L432 NwaCegarLoop]: 140 mSDtfsCounter, 0 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:10,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 664 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 808 Invalid, 0 Unknown, 170 Unchecked, 1.2s Time] [2024-11-09 04:30:10,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-09 04:30:10,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2024-11-09 04:30:10,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 78 states have (on average 2.141025641025641) internal successors, (167), 151 states have internal predecessors, (167), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 04:30:10,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 175 transitions. [2024-11-09 04:30:10,775 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 175 transitions. Word has length 22 [2024-11-09 04:30:10,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:10,775 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 175 transitions. [2024-11-09 04:30:10,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:30:10,776 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 175 transitions. [2024-11-09 04:30:10,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 04:30:10,776 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:10,777 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:10,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 04:30:10,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 04:30:10,981 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:30:10,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:10,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1086394666, now seen corresponding path program 1 times [2024-11-09 04:30:10,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:10,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620984785] [2024-11-09 04:30:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:10,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:30:11,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:11,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620984785] [2024-11-09 04:30:11,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620984785] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:11,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904548620] [2024-11-09 04:30:11,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:11,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:11,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:11,118 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:11,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 04:30:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:11,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 04:30:11,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:30:11,287 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:11,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:30:11,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904548620] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:30:11,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1067805528] [2024-11-09 04:30:11,355 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 04:30:11,355 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:11,356 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:11,356 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:11,356 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:12,199 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 155 for LOIs [2024-11-09 04:30:12,647 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:30:30,361 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2717#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (exists ((|v_ULTIMATE.start_dll_circular_create_~last~0#1.base_19| Int)) (not (= (select |#valid| |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_19|) 1))) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_dll_circular_create_~data#1| 1))' at error location [2024-11-09 04:30:30,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:30:30,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:30:30,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-11-09 04:30:30,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841291086] [2024-11-09 04:30:30,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:30,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:30:30,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:30,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:30:30,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=360, Unknown=4, NotChecked=0, Total=420 [2024-11-09 04:30:30,363 INFO L87 Difference]: Start difference. First operand 157 states and 175 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:30,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:30,545 INFO L93 Difference]: Finished difference Result 157 states and 174 transitions. [2024-11-09 04:30:30,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:30:30,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2024-11-09 04:30:30,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:30,547 INFO L225 Difference]: With dead ends: 157 [2024-11-09 04:30:30,547 INFO L226 Difference]: Without dead ends: 157 [2024-11-09 04:30:30,547 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=56, Invalid=360, Unknown=4, NotChecked=0, Total=420 [2024-11-09 04:30:30,547 INFO L432 NwaCegarLoop]: 143 mSDtfsCounter, 1 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:30,548 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 706 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:30:30,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-09 04:30:30,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2024-11-09 04:30:30,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 78 states have (on average 2.128205128205128) internal successors, (166), 151 states have internal predecessors, (166), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 04:30:30,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 174 transitions. [2024-11-09 04:30:30,552 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 174 transitions. Word has length 24 [2024-11-09 04:30:30,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:30,553 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 174 transitions. [2024-11-09 04:30:30,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:30,553 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 174 transitions. [2024-11-09 04:30:30,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 04:30:30,553 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:30,554 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:30,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 04:30:30,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-09 04:30:30,754 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:30:30,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:30,755 INFO L85 PathProgramCache]: Analyzing trace with hash -686302055, now seen corresponding path program 1 times [2024-11-09 04:30:30,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:30,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139650898] [2024-11-09 04:30:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:30,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 04:30:30,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:30,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139650898] [2024-11-09 04:30:30,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139650898] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:30,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984302463] [2024-11-09 04:30:30,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:30,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:30,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:30,873 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:30,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 04:30:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:31,000 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 04:30:31,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:31,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:30:31,141 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-09 04:30:31,199 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-09 04:30:31,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-09 04:30:31,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 5 not checked. [2024-11-09 04:30:31,219 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:31,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984302463] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:31,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1690747104] [2024-11-09 04:30:31,314 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:30:31,314 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:31,314 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:31,315 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:31,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:32,175 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 155 for LOIs [2024-11-09 04:30:32,704 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:30:53,263 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3153#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (exists ((|v_ULTIMATE.start_dll_circular_create_~last~0#1.base_20| Int)) (not (= (select |#valid| |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_20|) 1))) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_dll_circular_create_~data#1| 1))' at error location [2024-11-09 04:30:53,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:30:53,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:30:53,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 9 [2024-11-09 04:30:53,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838633701] [2024-11-09 04:30:53,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:53,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 04:30:53,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:53,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 04:30:53,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=570, Unknown=6, NotChecked=48, Total=702 [2024-11-09 04:30:53,265 INFO L87 Difference]: Start difference. First operand 157 states and 174 transitions. Second operand has 10 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 04:30:54,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:54,262 INFO L93 Difference]: Finished difference Result 156 states and 173 transitions. [2024-11-09 04:30:54,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 04:30:54,263 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2024-11-09 04:30:54,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:54,264 INFO L225 Difference]: With dead ends: 156 [2024-11-09 04:30:54,264 INFO L226 Difference]: Without dead ends: 156 [2024-11-09 04:30:54,265 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=95, Invalid=715, Unknown=6, NotChecked=54, Total=870 [2024-11-09 04:30:54,265 INFO L432 NwaCegarLoop]: 136 mSDtfsCounter, 10 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:54,266 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 601 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 527 Invalid, 0 Unknown, 168 Unchecked, 0.8s Time] [2024-11-09 04:30:54,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-09 04:30:54,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2024-11-09 04:30:54,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 150 states have internal predecessors, (165), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 04:30:54,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 173 transitions. [2024-11-09 04:30:54,271 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 173 transitions. Word has length 25 [2024-11-09 04:30:54,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:54,271 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 173 transitions. [2024-11-09 04:30:54,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 04:30:54,271 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 173 transitions. [2024-11-09 04:30:54,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 04:30:54,272 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:54,272 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:54,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 04:30:54,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-09 04:30:54,473 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:30:54,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:54,473 INFO L85 PathProgramCache]: Analyzing trace with hash -686302054, now seen corresponding path program 1 times [2024-11-09 04:30:54,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:54,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845670496] [2024-11-09 04:30:54,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:54,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:30:54,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:54,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845670496] [2024-11-09 04:30:54,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845670496] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:54,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56508850] [2024-11-09 04:30:54,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:54,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:54,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:54,784 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:54,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 04:30:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:54,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 04:30:54,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:54,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:30:54,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 04:30:55,189 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-09 04:30:55,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:30:55,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 04:30:55,246 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 04:30:55,247 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 11 treesize of output 11 [2024-11-09 04:30:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2024-11-09 04:30:55,320 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:55,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56508850] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:55,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [44342149] [2024-11-09 04:30:55,545 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:30:55,545 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:55,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:55,545 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:55,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:56,513 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 155 for LOIs [2024-11-09 04:30:56,915 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:31:11,243 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3600#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (exists ((|v_ULTIMATE.start_dll_circular_create_~last~0#1.base_21| Int)) (<= (select |#length| |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_21|) 3)) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_dll_circular_create_~data#1| 1))' at error location [2024-11-09 04:31:11,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:31:11,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:31:11,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2024-11-09 04:31:11,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102650469] [2024-11-09 04:31:11,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:31:11,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 04:31:11,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:11,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 04:31:11,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=887, Unknown=3, NotChecked=60, Total=1056 [2024-11-09 04:31:11,246 INFO L87 Difference]: Start difference. First operand 156 states and 173 transitions. Second operand has 15 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 04:31:12,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:31:12,428 INFO L93 Difference]: Finished difference Result 175 states and 199 transitions. [2024-11-09 04:31:12,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 04:31:12,428 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2024-11-09 04:31:12,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:31:12,430 INFO L225 Difference]: With dead ends: 175 [2024-11-09 04:31:12,430 INFO L226 Difference]: Without dead ends: 175 [2024-11-09 04:31:12,431 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=137, Invalid=1124, Unknown=3, NotChecked=68, Total=1332 [2024-11-09 04:31:12,432 INFO L432 NwaCegarLoop]: 136 mSDtfsCounter, 26 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:31:12,432 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 861 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 621 Invalid, 0 Unknown, 194 Unchecked, 1.0s Time] [2024-11-09 04:31:12,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-09 04:31:12,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 168. [2024-11-09 04:31:12,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 89 states have (on average 2.056179775280899) internal successors, (183), 161 states have internal predecessors, (183), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 04:31:12,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 193 transitions. [2024-11-09 04:31:12,438 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 193 transitions. Word has length 25 [2024-11-09 04:31:12,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:31:12,438 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 193 transitions. [2024-11-09 04:31:12,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 04:31:12,438 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 193 transitions. [2024-11-09 04:31:12,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-09 04:31:12,439 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:31:12,439 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:31:12,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 04:31:12,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:31:12,644 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:31:12,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:31:12,645 INFO L85 PathProgramCache]: Analyzing trace with hash 199472780, now seen corresponding path program 1 times [2024-11-09 04:31:12,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:31:12,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813311230] [2024-11-09 04:31:12,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:12,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:31:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:12,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 04:31:12,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:31:12,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813311230] [2024-11-09 04:31:12,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813311230] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:31:12,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:31:12,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 04:31:12,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264737157] [2024-11-09 04:31:12,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:31:12,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 04:31:12,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:12,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 04:31:12,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:31:12,841 INFO L87 Difference]: Start difference. First operand 168 states and 193 transitions. Second operand has 7 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:31:13,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:31:13,731 INFO L93 Difference]: Finished difference Result 167 states and 192 transitions. [2024-11-09 04:31:13,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:31:13,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2024-11-09 04:31:13,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:31:13,733 INFO L225 Difference]: With dead ends: 167 [2024-11-09 04:31:13,733 INFO L226 Difference]: Without dead ends: 167 [2024-11-09 04:31:13,733 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:31:13,734 INFO L432 NwaCegarLoop]: 142 mSDtfsCounter, 8 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 04:31:13,734 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 545 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 04:31:13,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-09 04:31:13,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2024-11-09 04:31:13,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 89 states have (on average 2.044943820224719) internal successors, (182), 160 states have internal predecessors, (182), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 04:31:13,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 192 transitions. [2024-11-09 04:31:13,739 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 192 transitions. Word has length 26 [2024-11-09 04:31:13,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:31:13,739 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 192 transitions. [2024-11-09 04:31:13,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:31:13,740 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 192 transitions. [2024-11-09 04:31:13,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-09 04:31:13,740 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:31:13,740 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:31:13,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 04:31:13,741 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:31:13,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:31:13,741 INFO L85 PathProgramCache]: Analyzing trace with hash 199472781, now seen corresponding path program 1 times [2024-11-09 04:31:13,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:31:13,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234726110] [2024-11-09 04:31:13,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:13,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:31:13,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:31:14,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:31:14,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234726110] [2024-11-09 04:31:14,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234726110] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:31:14,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:31:14,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 04:31:14,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005085706] [2024-11-09 04:31:14,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:31:14,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 04:31:14,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:14,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 04:31:14,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:31:14,077 INFO L87 Difference]: Start difference. First operand 167 states and 192 transitions. Second operand has 7 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:31:14,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:31:14,740 INFO L93 Difference]: Finished difference Result 166 states and 191 transitions. [2024-11-09 04:31:14,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:31:14,741 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2024-11-09 04:31:14,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:31:14,742 INFO L225 Difference]: With dead ends: 166 [2024-11-09 04:31:14,742 INFO L226 Difference]: Without dead ends: 166 [2024-11-09 04:31:14,742 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:31:14,742 INFO L432 NwaCegarLoop]: 141 mSDtfsCounter, 7 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 04:31:14,743 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 570 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 04:31:14,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-09 04:31:14,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2024-11-09 04:31:14,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 89 states have (on average 2.033707865168539) internal successors, (181), 159 states have internal predecessors, (181), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 04:31:14,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 191 transitions. [2024-11-09 04:31:14,748 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 191 transitions. Word has length 26 [2024-11-09 04:31:14,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:31:14,748 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 191 transitions. [2024-11-09 04:31:14,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:31:14,749 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 191 transitions. [2024-11-09 04:31:14,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 04:31:14,749 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:31:14,750 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:31:14,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 04:31:14,750 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:31:14,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:31:14,750 INFO L85 PathProgramCache]: Analyzing trace with hash 449204546, now seen corresponding path program 1 times [2024-11-09 04:31:14,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:31:14,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672681435] [2024-11-09 04:31:14,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:14,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:31:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 04:31:15,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:31:15,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672681435] [2024-11-09 04:31:15,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672681435] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:31:15,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217790730] [2024-11-09 04:31:15,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:15,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:31:15,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:31:15,354 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:31:15,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 04:31:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:15,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 04:31:15,535 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:31:15,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:31:15,586 INFO L378 Elim1Store]: Elim1 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 5 treesize of output 3 [2024-11-09 04:31:15,693 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 04:31:15,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-09 04:31:15,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-09 04:31:15,830 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))))) is different from true [2024-11-09 04:31:15,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:31:15,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-09 04:31:15,999 INFO L378 Elim1Store]: Elim1 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 5 treesize of output 3 [2024-11-09 04:31:16,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:31:16,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 04:31:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 10 not checked. [2024-11-09 04:31:16,079 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:31:16,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217790730] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:31:16,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2010747203] [2024-11-09 04:31:16,247 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-09 04:31:16,248 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:31:16,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:31:16,248 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:31:16,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:31:17,564 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 8 for LOIs [2024-11-09 04:31:17,588 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:31:29,109 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4775#(and (= 5 |ULTIMATE.start_dll_circular_insert_~data#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~mid_index~0#1| 1) (= |ULTIMATE.start_dll_circular_insert_~head#1.offset| 0) (= |ULTIMATE.start_dll_circular_insert_~index#1| 1) (= |ULTIMATE.start_main_~uneq~0#1| 5) (= |ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.offset| 0) (= |ULTIMATE.start_dll_circular_insert_~new_node~0#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base| 0) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (exists ((|v_ULTIMATE.start_dll_circular_insert_~head#1.base_29| Int)) (and (not (= (select |#valid| |v_ULTIMATE.start_dll_circular_insert_~head#1.base_29|) 1)) (or (and (exists ((|v_#memory_$Pointer$.offset_206| (Array Int (Array Int Int))) (|v_old(#length)_AFTER_CALL_45| (Array Int Int)) (|v_old(#valid)_AFTER_CALL_45| (Array Int Int)) (|v_#memory_$Pointer$.base_206| (Array Int (Array Int Int))) (|v_#memory_int_177| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_AFTER_CALL_45| (Array Int (Array Int Int))) (|v_#memory_int_178| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_45| (Array Int (Array Int Int)))) (and (= (select (select (store (store |v_#memory_$Pointer$.offset_206| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4) (store (select |v_#memory_$Pointer$.offset_206| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 0 0)) (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0) (store (select (store |v_#memory_$Pointer$.offset_206| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4) (store (select |v_#memory_$Pointer$.offset_206| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 0 0)) (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4 0)) |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (<= 8 (select |v_old(#length)_AFTER_CALL_45| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0))) (= (store |v_#memory_int_177| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4) (store (select |v_#memory_int_177| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 0 (select (select |v_#memory_int_178| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 0))) |v_#memory_int_178|) (= (select |v_old(#valid)_AFTER_CALL_45| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 1) (= (select |v_old(#valid)_AFTER_CALL_45| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 1) (= |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| (store (store |v_#memory_$Pointer$.base_206| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4) (store (select |v_#memory_$Pointer$.base_206| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 0 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0))) (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0) (store (select (store |v_#memory_$Pointer$.base_206| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4) (store (select |v_#memory_$Pointer$.base_206| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 0 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0))) (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)))) (= |v_old(#memory_int)_AFTER_CALL_45| (store |v_#memory_int_178| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0) (store (select |v_#memory_int_178| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4 (select (select |v_old(#memory_int)_AFTER_CALL_45| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)))) (<= 4 (select |v_old(#length)_AFTER_CALL_45| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_45| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4))))) (= |ULTIMATE.start_main_~#s~0#1.base| |v_ULTIMATE.start_dll_circular_insert_~head#1.base_29|) (not (= |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| 0)) (exists ((|v_#memory_int_171| (Array Int (Array Int Int))) (|v_#memory_int_172| (Array Int (Array Int Int))) (|v_#memory_int_173| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_173| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (select |v_#memory_int_173| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 8 5))) (= (store |v_#memory_int_172| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (select |v_#memory_int_172| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4 (select (select |v_#memory_int_173| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4))) |v_#memory_int_173|) (= (store |v_#memory_int_171| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (select |v_#memory_int_171| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0 (select (select |v_#memory_int_172| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0))) |v_#memory_int_172|))) (exists ((|v_#memory_$Pointer$.base_200| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_200| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (store (store (select |v_#memory_$Pointer$.base_200| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0 0) 4 0) 8 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 8))) |#memory_$Pointer$.base|)) (exists ((|v_#memory_$Pointer$.offset_200| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_200| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (store (store (select |v_#memory_$Pointer$.offset_200| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0 0) 4 0) 8 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 8))))) (exists ((|v_#valid_201| (Array Int Int))) (and (= (select |v_#valid_201| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0) (= (store |v_#valid_201| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| 1) |#valid|))) (<= (+ |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#length_175| (Array Int Int))) (= |#length| (store |v_#length_175| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| 12)))) (and (= |ULTIMATE.start_main_~#s~0#1.base| |v_ULTIMATE.start_dll_circular_insert_~head#1.base_29|) (not (= |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| 0)) (exists ((|v_#memory_int_171| (Array Int (Array Int Int))) (|v_#memory_int_172| (Array Int (Array Int Int))) (|v_#memory_int_173| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_173| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (select |v_#memory_int_173| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 8 5))) (= (store |v_#memory_int_172| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (select |v_#memory_int_172| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4 (select (select |v_#memory_int_173| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4))) |v_#memory_int_173|) (= (store |v_#memory_int_171| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (select |v_#memory_int_171| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0 (select (select |v_#memory_int_172| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0))) |v_#memory_int_172|))) (exists ((|v_#memory_$Pointer$.base_200| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_200| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (store (store (select |v_#memory_$Pointer$.base_200| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0 0) 4 0) 8 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 8))) |#memory_$Pointer$.base|)) (exists ((|v_#memory_$Pointer$.offset_200| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_200| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (store (store (select |v_#memory_$Pointer$.offset_200| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0 0) 4 0) 8 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 8))))) (exists ((|v_#valid_201| (Array Int Int))) (and (= (select |v_#valid_201| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0) (= (store |v_#valid_201| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| 1) |#valid|))) (<= (+ |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#length_175| (Array Int Int))) (= |#length| (store |v_#length_175| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| 12))) (exists ((|v_#memory_$Pointer$.offset_206| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_AFTER_CALL_44| (Array Int (Array Int Int))) (|v_old(#valid)_AFTER_CALL_44| (Array Int Int)) (|v_#memory_$Pointer$.base_206| (Array Int (Array Int Int))) (|v_#memory_int_177| (Array Int (Array Int Int))) (|v_#memory_int_178| (Array Int (Array Int Int))) (|v_#length_BEFORE_CALL_76| (Array Int Int)) (|v_old(#memory_int)_AFTER_CALL_44| (Array Int (Array Int Int)))) (and (= (select |v_old(#valid)_AFTER_CALL_44| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 1) (= |v_old(#memory_int)_AFTER_CALL_44| (store |v_#memory_int_178| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0) (store (select |v_#memory_int_178| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4 (select (select |v_old(#memory_int)_AFTER_CALL_44| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)))) (= |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| (store (store |v_#memory_$Pointer$.base_206| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4) (store (select |v_#memory_$Pointer$.base_206| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 0 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0))) (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0) (store (select (store |v_#memory_$Pointer$.base_206| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4) (store (select |v_#memory_$Pointer$.base_206| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 0 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0))) (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)))) (<= 8 (select |v_#length_BEFORE_CALL_76| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0))) (= (store |v_#memory_int_177| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4) (store (select |v_#memory_int_177| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 0 (select (select |v_#memory_int_178| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 0))) |v_#memory_int_178|) (= (select |v_old(#valid)_AFTER_CALL_44| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 1) (<= 4 (select |v_#length_BEFORE_CALL_76| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4))) (= (select (select (store (store |v_#memory_$Pointer$.offset_206| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4) (store (select |v_#memory_$Pointer$.offset_206| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 0 0)) (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0) (store (select (store |v_#memory_$Pointer$.offset_206| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4) (store (select |v_#memory_$Pointer$.offset_206| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 0 0)) (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_44| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4 0)) |ULTIMATE.start_main_~#s~0#1.base|) 0) 0))))))) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2024-11-09 04:31:29,110 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:31:29,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:31:29,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2024-11-09 04:31:29,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599802519] [2024-11-09 04:31:29,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:31:29,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 04:31:29,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:29,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 04:31:29,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1151, Unknown=2, NotChecked=68, Total=1332 [2024-11-09 04:31:29,112 INFO L87 Difference]: Start difference. First operand 166 states and 191 transitions. Second operand has 16 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 13 states have internal predecessors, (47), 5 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 04:31:30,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:31:30,330 INFO L93 Difference]: Finished difference Result 174 states and 201 transitions. [2024-11-09 04:31:30,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:31:30,331 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 13 states have internal predecessors, (47), 5 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 35 [2024-11-09 04:31:30,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:31:30,332 INFO L225 Difference]: With dead ends: 174 [2024-11-09 04:31:30,332 INFO L226 Difference]: Without dead ends: 174 [2024-11-09 04:31:30,333 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=133, Invalid=1351, Unknown=2, NotChecked=74, Total=1560 [2024-11-09 04:31:30,334 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 347 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:31:30,334 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 469 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 620 Invalid, 0 Unknown, 168 Unchecked, 1.0s Time] [2024-11-09 04:31:30,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-11-09 04:31:30,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 155. [2024-11-09 04:31:30,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 89 states have (on average 1.9101123595505618) internal successors, (170), 148 states have internal predecessors, (170), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 04:31:30,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 180 transitions. [2024-11-09 04:31:30,339 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 180 transitions. Word has length 35 [2024-11-09 04:31:30,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:31:30,339 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 180 transitions. [2024-11-09 04:31:30,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 13 states have internal predecessors, (47), 5 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 04:31:30,340 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 180 transitions. [2024-11-09 04:31:30,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 04:31:30,341 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:31:30,341 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:31:30,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 04:31:30,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 04:31:30,542 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:31:30,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:31:30,542 INFO L85 PathProgramCache]: Analyzing trace with hash 449204547, now seen corresponding path program 1 times [2024-11-09 04:31:30,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:31:30,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763914694] [2024-11-09 04:31:30,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:30,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:31:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:31:31,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:31:31,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763914694] [2024-11-09 04:31:31,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763914694] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:31:31,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796053991] [2024-11-09 04:31:31,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:31,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:31:31,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:31:31,637 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:31:31,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 04:31:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:31,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 04:31:31,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:31:31,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 04:31:31,918 INFO L378 Elim1Store]: Elim1 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 5 treesize of output 3 [2024-11-09 04:31:31,930 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2024-11-09 04:31:31,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:31:31,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 04:31:32,020 INFO L378 Elim1Store]: Elim1 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 5 treesize of output 3 [2024-11-09 04:31:32,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:31:32,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 04:31:32,214 INFO L378 Elim1Store]: Elim1 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 5 treesize of output 3 [2024-11-09 04:31:32,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:31:32,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 04:31:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 04:31:32,324 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:31:32,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796053991] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:31:32,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:31:32,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 17 [2024-11-09 04:31:32,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072327175] [2024-11-09 04:31:32,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:31:32,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 04:31:32,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:32,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 04:31:32,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=253, Unknown=1, NotChecked=32, Total=342 [2024-11-09 04:31:32,326 INFO L87 Difference]: Start difference. First operand 155 states and 180 transitions. Second operand has 7 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:31:32,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:31:32,796 INFO L93 Difference]: Finished difference Result 149 states and 174 transitions. [2024-11-09 04:31:32,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:31:32,797 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-11-09 04:31:32,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:31:32,798 INFO L225 Difference]: With dead ends: 149 [2024-11-09 04:31:32,798 INFO L226 Difference]: Without dead ends: 149 [2024-11-09 04:31:32,798 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=284, Unknown=1, NotChecked=34, Total=380 [2024-11-09 04:31:32,799 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 53 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:31:32,799 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 350 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 271 Invalid, 0 Unknown, 172 Unchecked, 0.4s Time] [2024-11-09 04:31:32,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-11-09 04:31:32,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2024-11-09 04:31:32,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 89 states have (on average 1.8314606741573034) internal successors, (163), 141 states have internal predecessors, (163), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 04:31:32,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 173 transitions. [2024-11-09 04:31:32,804 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 173 transitions. Word has length 35 [2024-11-09 04:31:32,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:31:32,804 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 173 transitions. [2024-11-09 04:31:32,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:31:32,805 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 173 transitions. [2024-11-09 04:31:32,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-09 04:31:32,806 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:31:32,806 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:31:32,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 04:31:33,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 04:31:33,006 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:31:33,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:31:33,007 INFO L85 PathProgramCache]: Analyzing trace with hash 371274549, now seen corresponding path program 1 times [2024-11-09 04:31:33,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:31:33,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555688091] [2024-11-09 04:31:33,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:33,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:31:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:33,136 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 04:31:33,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:31:33,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555688091] [2024-11-09 04:31:33,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555688091] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:31:33,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411276650] [2024-11-09 04:31:33,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:33,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:31:33,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:31:33,139 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:31:33,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 04:31:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:33,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 04:31:33,324 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:31:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 04:31:33,383 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:31:33,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411276650] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:31:33,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:31:33,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2024-11-09 04:31:33,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245102152] [2024-11-09 04:31:33,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:31:33,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:31:33,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:33,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:31:33,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:31:33,385 INFO L87 Difference]: Start difference. First operand 148 states and 173 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:31:33,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:31:33,486 INFO L93 Difference]: Finished difference Result 127 states and 140 transitions. [2024-11-09 04:31:33,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:31:33,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2024-11-09 04:31:33,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:31:33,488 INFO L225 Difference]: With dead ends: 127 [2024-11-09 04:31:33,488 INFO L226 Difference]: Without dead ends: 127 [2024-11-09 04:31:33,488 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:31:33,489 INFO L432 NwaCegarLoop]: 120 mSDtfsCounter, 0 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:31:33,489 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 351 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:31:33,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-09 04:31:33,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2024-11-09 04:31:33,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 73 states have (on average 1.8356164383561644) internal successors, (134), 122 states have internal predecessors, (134), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:31:33,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 140 transitions. [2024-11-09 04:31:33,493 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 140 transitions. Word has length 36 [2024-11-09 04:31:33,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:31:33,494 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 140 transitions. [2024-11-09 04:31:33,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:31:33,494 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 140 transitions. [2024-11-09 04:31:33,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-09 04:31:33,495 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:31:33,495 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:31:33,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 04:31:33,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 04:31:33,696 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:31:33,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:31:33,696 INFO L85 PathProgramCache]: Analyzing trace with hash -858115843, now seen corresponding path program 1 times [2024-11-09 04:31:33,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:31:33,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469837260] [2024-11-09 04:31:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:33,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:31:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:31:34,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:31:34,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469837260] [2024-11-09 04:31:34,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469837260] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:31:34,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560050992] [2024-11-09 04:31:34,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:34,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:31:34,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:31:34,718 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:31:34,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 04:31:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:35,150 INFO L255 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-09 04:31:35,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:31:35,382 INFO L378 Elim1Store]: Elim1 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 9 treesize of output 5 [2024-11-09 04:31:35,534 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_node_create_~temp~0#1.base_64| Int)) (and (<= (+ |v_node_create_~temp~0#1.base_64| 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_64| (select |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_64|))) (= |c_#valid| (store |c_old(#valid)| |v_node_create_~temp~0#1.base_64| 1)))) is different from true [2024-11-09 04:31:35,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:31:35,552 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-09 04:31:35,582 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 04:31:35,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2024-11-09 04:31:35,680 INFO L378 Elim1Store]: Elim1 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 17 treesize of output 9 [2024-11-09 04:31:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 04:31:35,731 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:31:35,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560050992] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:31:35,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:31:35,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [14] total 19 [2024-11-09 04:31:35,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572741008] [2024-11-09 04:31:35,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:31:35,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 04:31:35,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:35,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 04:31:35,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=293, Unknown=1, NotChecked=34, Total=380 [2024-11-09 04:31:35,733 INFO L87 Difference]: Start difference. First operand 127 states and 140 transitions. Second operand has 10 states, 7 states have (on average 3.857142857142857) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:31:36,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:31:36,558 INFO L93 Difference]: Finished difference Result 169 states and 188 transitions. [2024-11-09 04:31:36,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 04:31:36,559 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 3.857142857142857) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2024-11-09 04:31:36,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:31:36,559 INFO L225 Difference]: With dead ends: 169 [2024-11-09 04:31:36,559 INFO L226 Difference]: Without dead ends: 169 [2024-11-09 04:31:36,560 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=359, Unknown=1, NotChecked=38, Total=462 [2024-11-09 04:31:36,560 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 83 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 04:31:36,560 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 475 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 447 Invalid, 0 Unknown, 208 Unchecked, 0.7s Time] [2024-11-09 04:31:36,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-09 04:31:36,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 135. [2024-11-09 04:31:36,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 81 states have (on average 1.8888888888888888) internal successors, (153), 130 states have internal predecessors, (153), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:31:36,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 159 transitions. [2024-11-09 04:31:36,565 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 159 transitions. Word has length 38 [2024-11-09 04:31:36,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:31:36,565 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 159 transitions. [2024-11-09 04:31:36,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 3.857142857142857) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:31:36,565 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 159 transitions. [2024-11-09 04:31:36,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-09 04:31:36,566 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:31:36,566 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:31:36,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 04:31:36,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 04:31:36,767 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:31:36,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:31:36,767 INFO L85 PathProgramCache]: Analyzing trace with hash -858115842, now seen corresponding path program 1 times [2024-11-09 04:31:36,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:31:36,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294476799] [2024-11-09 04:31:36,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:36,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:31:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:31:38,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:31:38,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294476799] [2024-11-09 04:31:38,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294476799] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:31:38,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544293178] [2024-11-09 04:31:38,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:38,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:31:38,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:31:38,683 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:31:38,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 04:31:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:38,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-09 04:31:38,980 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:31:39,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 04:31:39,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 04:31:39,593 INFO L378 Elim1Store]: Elim1 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 7 treesize of output 3 [2024-11-09 04:31:39,734 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_node_create_~temp~0#1.base_66| Int)) (and (<= (+ |v_node_create_~temp~0#1.base_66| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |v_node_create_~temp~0#1.base_66| (select |c_#length| |v_node_create_~temp~0#1.base_66|)) |c_#length|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |v_node_create_~temp~0#1.base_66| (select |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_66|))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |v_node_create_~temp~0#1.base_66| (select |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_66|))) (= (select |c_old(#valid)| |v_node_create_~temp~0#1.base_66|) 0))) is different from true [2024-11-09 04:31:39,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:31:39,759 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 04:31:39,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:31:39,770 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2024-11-09 04:31:39,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:31:39,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-09 04:31:39,800 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-09 04:31:39,801 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 15 treesize of output 15 [2024-11-09 04:31:39,878 INFO L378 Elim1Store]: Elim1 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 17 treesize of output 9 [2024-11-09 04:31:39,957 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2024-11-09 04:31:39,957 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:31:40,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544293178] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:31:40,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1261481722] [2024-11-09 04:31:40,439 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 04:31:40,439 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:31:40,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:31:40,439 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:31:40,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:31:41,831 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 8 for LOIs [2024-11-09 04:31:41,859 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:31:59,083 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6511#(and (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_insert_~head#1.base|) 0) |ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.offset|) (= 5 |ULTIMATE.start_dll_circular_insert_~data#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~mid_index~0#1| 1) (= |ULTIMATE.start_dll_circular_insert_~head#1.offset| 0) (= |ULTIMATE.start_dll_circular_insert_~index#1| 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_insert_~head#1.base|) 0) |ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (or (< (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_insert_~head#1.base|) 0)) (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_insert_~head#1.base|) 0) 4)) (< (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_insert_~head#1.base|) 0) 0)) (<= 4 (select |#length| |ULTIMATE.start_dll_circular_insert_~head#1.base|)) (<= 2 |ULTIMATE.start_dll_circular_insert_~head#1.base|) (or (and (exists ((|v_old(#valid)_AFTER_CALL_64| (Array Int Int)) (|v_#memory_$Pointer$.offset_229| (Array Int (Array Int Int))) (|v_#memory_int_BEFORE_CALL_91| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_AFTER_CALL_64| (Array Int (Array Int Int))) (|v_old(#length)_AFTER_CALL_64| (Array Int Int)) (|v_#memory_int_195| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_232| (Array Int (Array Int Int))) (|v_#memory_int_196| (Array Int (Array Int Int)))) (and (= |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| (store (store |v_#memory_$Pointer$.base_232| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4) (store (select |v_#memory_$Pointer$.base_232| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 0 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0))) (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0) (store (select (store |v_#memory_$Pointer$.base_232| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4) (store (select |v_#memory_$Pointer$.base_232| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 0 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0))) (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)))) (= (select |v_old(#valid)_AFTER_CALL_64| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 1) (= (select (select (store (store |v_#memory_$Pointer$.offset_229| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4) (store (select |v_#memory_$Pointer$.offset_229| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 0 0)) (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0) (store (select (store |v_#memory_$Pointer$.offset_229| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4) (store (select |v_#memory_$Pointer$.offset_229| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 0 0)) (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4 0)) |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (<= 4 (select |v_old(#length)_AFTER_CALL_64| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4))) (= (store |v_#memory_int_195| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4) (store (select |v_#memory_int_195| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 0 (select (select |v_#memory_int_196| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 0))) |v_#memory_int_196|) (<= 8 (select |v_old(#length)_AFTER_CALL_64| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0))) (= (select |v_old(#valid)_AFTER_CALL_64| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 1) (= (store |v_#memory_int_196| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0) (store (select |v_#memory_int_196| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4 (select (select |v_#memory_int_BEFORE_CALL_91| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_64| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4))) |v_#memory_int_BEFORE_CALL_91|))) (exists ((|v_#memory_$Pointer$.base_226| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_226| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (store (store (select |v_#memory_$Pointer$.base_226| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0 0) 4 0) 8 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 8))) |#memory_$Pointer$.base|)) (exists ((|v_#memory_$Pointer$.offset_223| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_223| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (store (store (select |v_#memory_$Pointer$.offset_223| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0 0) 4 0) 8 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 8))))) (not (= |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| 0)) (exists ((|v_#length_190| (Array Int Int))) (= |#length| (store |v_#length_190| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| 12))) (exists ((|v_#valid_211| (Array Int Int))) (and (= (store |v_#valid_211| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| 1) |#valid|) (= (select |v_#valid_211| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0))) (<= (+ |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| 1) |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_insert_~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_#memory_int_190| (Array Int (Array Int Int))) (|v_#memory_int_191| (Array Int (Array Int Int))) (|v_#memory_int_189| (Array Int (Array Int Int)))) (and (= |v_#memory_int_191| (store |v_#memory_int_190| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (select |v_#memory_int_190| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4 (select (select |v_#memory_int_191| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4)))) (= |#memory_int| (store |v_#memory_int_191| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (select |v_#memory_int_191| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 8 5))) (= (store |v_#memory_int_189| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (select |v_#memory_int_189| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0 (select (select |v_#memory_int_190| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0))) |v_#memory_int_190|)))) (and (exists ((|v_#memory_$Pointer$.base_226| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_226| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (store (store (select |v_#memory_$Pointer$.base_226| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0 0) 4 0) 8 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 8))) |#memory_$Pointer$.base|)) (exists ((|v_#memory_$Pointer$.offset_223| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_223| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (store (store (select |v_#memory_$Pointer$.offset_223| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0 0) 4 0) 8 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 8))))) (not (= |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| 0)) (exists ((|v_old(#memory_$Pointer$.base)_AFTER_CALL_65| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_229| (Array Int (Array Int Int))) (|v_old(#valid)_AFTER_CALL_65| (Array Int Int)) (|v_old(#length)_AFTER_CALL_65| (Array Int Int)) (|v_#memory_int_BEFORE_CALL_93| (Array Int (Array Int Int))) (|v_#memory_int_195| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_232| (Array Int (Array Int Int))) (|v_#memory_int_196| (Array Int (Array Int Int)))) (and (= |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| (store (store |v_#memory_$Pointer$.base_232| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4) (store (select |v_#memory_$Pointer$.base_232| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 0 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0))) (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0) (store (select (store |v_#memory_$Pointer$.base_232| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4) (store (select |v_#memory_$Pointer$.base_232| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 0 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0))) (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)))) (= (select (select (store (store |v_#memory_$Pointer$.offset_229| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4) (store (select |v_#memory_$Pointer$.offset_229| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 0 0)) (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0) (store (select (store |v_#memory_$Pointer$.offset_229| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4) (store (select |v_#memory_$Pointer$.offset_229| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 0 0)) (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4 0)) |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= (select |v_old(#valid)_AFTER_CALL_65| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 1) (<= 4 (select |v_old(#length)_AFTER_CALL_65| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4))) (= (store |v_#memory_int_195| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4) (store (select |v_#memory_int_195| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 0 (select (select |v_#memory_int_196| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 0))) |v_#memory_int_196|) (= (store |v_#memory_int_196| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0) (store (select |v_#memory_int_196| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4 (select (select |v_#memory_int_BEFORE_CALL_93| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4))) |v_#memory_int_BEFORE_CALL_93|) (= (select |v_old(#valid)_AFTER_CALL_65| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0)) 4)) 1) (<= 8 (select |v_old(#length)_AFTER_CALL_65| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_65| |ULTIMATE.start_main_~#s~0#1.base|) 0))))) (exists ((|v_#length_190| (Array Int Int))) (= |#length| (store |v_#length_190| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| 12))) (exists ((|v_#valid_211| (Array Int Int))) (and (= (store |v_#valid_211| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| 1) |#valid|) (= (select |v_#valid_211| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0))) (<= (+ |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| 1) |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_insert_~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_#memory_int_190| (Array Int (Array Int Int))) (|v_#memory_int_191| (Array Int (Array Int Int))) (|v_#memory_int_189| (Array Int (Array Int Int)))) (and (= |v_#memory_int_191| (store |v_#memory_int_190| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (select |v_#memory_int_190| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4 (select (select |v_#memory_int_191| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4)))) (= |#memory_int| (store |v_#memory_int_191| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (select |v_#memory_int_191| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 8 5))) (= (store |v_#memory_int_189| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (select |v_#memory_int_189| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0 (select (select |v_#memory_int_190| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0))) |v_#memory_int_190|))))) (= |ULTIMATE.start_dll_circular_insert_~new_node~0#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= 1 (select |#valid| |ULTIMATE.start_dll_circular_insert_~head#1.base|)))' at error location [2024-11-09 04:31:59,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:31:59,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:31:59,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2024-11-09 04:31:59,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210061386] [2024-11-09 04:31:59,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:31:59,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 04:31:59,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:59,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 04:31:59,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2281, Unknown=3, NotChecked=96, Total=2550 [2024-11-09 04:31:59,086 INFO L87 Difference]: Start difference. First operand 135 states and 159 transitions. Second operand has 26 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 23 states have internal predecessors, (55), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-09 04:32:03,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:03,048 INFO L93 Difference]: Finished difference Result 167 states and 184 transitions. [2024-11-09 04:32:03,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 04:32:03,049 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 23 states have internal predecessors, (55), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2024-11-09 04:32:03,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:03,050 INFO L225 Difference]: With dead ends: 167 [2024-11-09 04:32:03,050 INFO L226 Difference]: Without dead ends: 167 [2024-11-09 04:32:03,051 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=247, Invalid=3294, Unknown=3, NotChecked=116, Total=3660 [2024-11-09 04:32:03,052 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 399 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:03,052 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 1037 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1405 Invalid, 0 Unknown, 183 Unchecked, 2.8s Time] [2024-11-09 04:32:03,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-09 04:32:03,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 135. [2024-11-09 04:32:03,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 81 states have (on average 1.8641975308641976) internal successors, (151), 130 states have internal predecessors, (151), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:32:03,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 157 transitions. [2024-11-09 04:32:03,058 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 157 transitions. Word has length 38 [2024-11-09 04:32:03,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:03,058 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 157 transitions. [2024-11-09 04:32:03,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 23 states have internal predecessors, (55), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-09 04:32:03,059 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 157 transitions. [2024-11-09 04:32:03,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-09 04:32:03,062 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:03,063 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:32:03,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 04:32:03,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 04:32:03,263 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:32:03,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:03,264 INFO L85 PathProgramCache]: Analyzing trace with hash -858104952, now seen corresponding path program 1 times [2024-11-09 04:32:03,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:03,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634397625] [2024-11-09 04:32:03,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:03,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:03,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:03,350 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 04:32:03,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:03,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634397625] [2024-11-09 04:32:03,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634397625] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:32:03,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:32:03,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:32:03,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175083889] [2024-11-09 04:32:03,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:32:03,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:32:03,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:03,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:32:03,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:32:03,352 INFO L87 Difference]: Start difference. First operand 135 states and 157 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 04:32:03,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:03,462 INFO L93 Difference]: Finished difference Result 131 states and 146 transitions. [2024-11-09 04:32:03,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:32:03,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2024-11-09 04:32:03,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:03,464 INFO L225 Difference]: With dead ends: 131 [2024-11-09 04:32:03,464 INFO L226 Difference]: Without dead ends: 131 [2024-11-09 04:32:03,464 INFO L431 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 [2024-11-09 04:32:03,465 INFO L432 NwaCegarLoop]: 123 mSDtfsCounter, 2 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:03,465 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 238 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:32:03,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-11-09 04:32:03,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2024-11-09 04:32:03,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 77 states have (on average 1.8181818181818181) internal successors, (140), 126 states have internal predecessors, (140), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:32:03,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 146 transitions. [2024-11-09 04:32:03,469 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 146 transitions. Word has length 38 [2024-11-09 04:32:03,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:03,470 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 146 transitions. [2024-11-09 04:32:03,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 04:32:03,470 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 146 transitions. [2024-11-09 04:32:03,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-09 04:32:03,471 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:03,471 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:32:03,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-09 04:32:03,472 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:32:03,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:03,472 INFO L85 PathProgramCache]: Analyzing trace with hash -4704791, now seen corresponding path program 1 times [2024-11-09 04:32:03,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:03,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939927540] [2024-11-09 04:32:03,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:03,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 04:32:03,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:03,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939927540] [2024-11-09 04:32:03,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939927540] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:32:03,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:32:03,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:32:03,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371636596] [2024-11-09 04:32:03,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:32:03,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:32:03,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:03,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:32:03,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:32:03,648 INFO L87 Difference]: Start difference. First operand 131 states and 146 transitions. Second operand has 6 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 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) [2024-11-09 04:32:04,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:04,267 INFO L93 Difference]: Finished difference Result 125 states and 140 transitions. [2024-11-09 04:32:04,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:32:04,268 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 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 40 [2024-11-09 04:32:04,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:04,268 INFO L225 Difference]: With dead ends: 125 [2024-11-09 04:32:04,268 INFO L226 Difference]: Without dead ends: 125 [2024-11-09 04:32:04,269 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:32:04,269 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 30 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:04,269 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 336 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 04:32:04,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-09 04:32:04,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2024-11-09 04:32:04,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 77 states have (on average 1.7402597402597402) internal successors, (134), 120 states have internal predecessors, (134), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:32:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 140 transitions. [2024-11-09 04:32:04,275 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 140 transitions. Word has length 40 [2024-11-09 04:32:04,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:04,275 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 140 transitions. [2024-11-09 04:32:04,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 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) [2024-11-09 04:32:04,276 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 140 transitions. [2024-11-09 04:32:04,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-09 04:32:04,277 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:04,277 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:32:04,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-09 04:32:04,278 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:32:04,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:04,278 INFO L85 PathProgramCache]: Analyzing trace with hash -4704790, now seen corresponding path program 1 times [2024-11-09 04:32:04,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:04,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880167308] [2024-11-09 04:32:04,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:04,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 04:32:04,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:04,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880167308] [2024-11-09 04:32:04,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880167308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:32:04,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958664400] [2024-11-09 04:32:04,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:04,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:32:04,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:32:04,467 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:32:04,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 04:32:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:04,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 04:32:04,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:32:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 04:32:04,800 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:32:04,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958664400] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:32:04,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:32:04,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2024-11-09 04:32:04,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83114009] [2024-11-09 04:32:04,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:32:04,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:32:04,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:04,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:32:04,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:32:04,804 INFO L87 Difference]: Start difference. First operand 125 states and 140 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:32:04,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:04,932 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2024-11-09 04:32:04,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:32:04,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2024-11-09 04:32:04,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:04,934 INFO L225 Difference]: With dead ends: 128 [2024-11-09 04:32:04,934 INFO L226 Difference]: Without dead ends: 128 [2024-11-09 04:32:04,934 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:32:04,935 INFO L432 NwaCegarLoop]: 113 mSDtfsCounter, 86 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:04,935 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 255 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:32:04,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-09 04:32:04,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2024-11-09 04:32:04,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 76 states have (on average 1.7105263157894737) internal successors, (130), 119 states have internal predecessors, (130), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:32:04,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 136 transitions. [2024-11-09 04:32:04,939 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 136 transitions. Word has length 40 [2024-11-09 04:32:04,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:04,939 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 136 transitions. [2024-11-09 04:32:04,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:32:04,940 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 136 transitions. [2024-11-09 04:32:04,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 04:32:04,940 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:04,940 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:32:04,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 04:32:05,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:32:05,142 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:32:05,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:05,142 INFO L85 PathProgramCache]: Analyzing trace with hash -476741906, now seen corresponding path program 1 times [2024-11-09 04:32:05,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:05,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766568589] [2024-11-09 04:32:05,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:05,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 04:32:05,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:05,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766568589] [2024-11-09 04:32:05,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766568589] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:32:05,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043784126] [2024-11-09 04:32:05,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:05,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:32:05,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:32:05,387 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:32:05,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 04:32:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:05,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 04:32:05,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:32:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 04:32:05,675 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:32:05,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043784126] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:32:05,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:32:05,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 6 [2024-11-09 04:32:05,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390197729] [2024-11-09 04:32:05,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:32:05,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:32:05,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:05,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:32:05,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:32:05,676 INFO L87 Difference]: Start difference. First operand 124 states and 136 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:32:05,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:05,814 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2024-11-09 04:32:05,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:32:05,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2024-11-09 04:32:05,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:05,815 INFO L225 Difference]: With dead ends: 124 [2024-11-09 04:32:05,815 INFO L226 Difference]: Without dead ends: 124 [2024-11-09 04:32:05,815 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:32:05,816 INFO L432 NwaCegarLoop]: 110 mSDtfsCounter, 79 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:05,816 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 360 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:32:05,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-09 04:32:05,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2024-11-09 04:32:05,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 74 states have (on average 1.6891891891891893) internal successors, (125), 115 states have internal predecessors, (125), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:32:05,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 131 transitions. [2024-11-09 04:32:05,820 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 131 transitions. Word has length 41 [2024-11-09 04:32:05,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:05,821 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 131 transitions. [2024-11-09 04:32:05,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:32:05,821 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 131 transitions. [2024-11-09 04:32:05,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 04:32:05,822 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:05,822 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:32:05,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 04:32:06,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-09 04:32:06,023 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:32:06,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:06,023 INFO L85 PathProgramCache]: Analyzing trace with hash -476731015, now seen corresponding path program 1 times [2024-11-09 04:32:06,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:06,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105201331] [2024-11-09 04:32:06,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:06,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 04:32:06,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:06,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105201331] [2024-11-09 04:32:06,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105201331] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:32:06,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:32:06,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:32:06,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007739065] [2024-11-09 04:32:06,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:32:06,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:32:06,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:06,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:32:06,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:32:06,143 INFO L87 Difference]: Start difference. First operand 120 states and 131 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 04:32:06,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:06,422 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2024-11-09 04:32:06,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:32:06,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2024-11-09 04:32:06,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:06,425 INFO L225 Difference]: With dead ends: 119 [2024-11-09 04:32:06,425 INFO L226 Difference]: Without dead ends: 119 [2024-11-09 04:32:06,425 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:32:06,425 INFO L432 NwaCegarLoop]: 109 mSDtfsCounter, 2 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:06,426 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 242 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:32:06,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-09 04:32:06,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2024-11-09 04:32:06,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 74 states have (on average 1.6756756756756757) internal successors, (124), 114 states have internal predecessors, (124), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:32:06,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 130 transitions. [2024-11-09 04:32:06,429 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 130 transitions. Word has length 41 [2024-11-09 04:32:06,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:06,429 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 130 transitions. [2024-11-09 04:32:06,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 04:32:06,430 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 130 transitions. [2024-11-09 04:32:06,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 04:32:06,430 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:06,430 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:32:06,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-09 04:32:06,430 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:32:06,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:06,431 INFO L85 PathProgramCache]: Analyzing trace with hash -476731014, now seen corresponding path program 1 times [2024-11-09 04:32:06,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:06,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910185378] [2024-11-09 04:32:06,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:06,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:32:08,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:08,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910185378] [2024-11-09 04:32:08,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910185378] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:32:08,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772454849] [2024-11-09 04:32:08,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:08,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:32:08,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:32:08,365 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:32:08,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 04:32:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:08,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 04:32:08,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:32:08,631 INFO L378 Elim1Store]: Elim1 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 7 treesize of output 3 [2024-11-09 04:32:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 04:32:08,767 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:32:08,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772454849] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:32:08,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:32:08,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [17] total 19 [2024-11-09 04:32:08,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137701478] [2024-11-09 04:32:08,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:32:08,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:32:08,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:08,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:32:08,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2024-11-09 04:32:08,768 INFO L87 Difference]: Start difference. First operand 119 states and 130 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 04:32:09,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:09,016 INFO L93 Difference]: Finished difference Result 118 states and 129 transitions. [2024-11-09 04:32:09,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:32:09,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2024-11-09 04:32:09,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:09,017 INFO L225 Difference]: With dead ends: 118 [2024-11-09 04:32:09,017 INFO L226 Difference]: Without dead ends: 118 [2024-11-09 04:32:09,017 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2024-11-09 04:32:09,018 INFO L432 NwaCegarLoop]: 108 mSDtfsCounter, 2 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:09,018 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 272 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:32:09,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-09 04:32:09,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2024-11-09 04:32:09,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 74 states have (on average 1.662162162162162) internal successors, (123), 113 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:32:09,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 129 transitions. [2024-11-09 04:32:09,022 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 129 transitions. Word has length 41 [2024-11-09 04:32:09,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:09,022 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 129 transitions. [2024-11-09 04:32:09,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 04:32:09,023 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 129 transitions. [2024-11-09 04:32:09,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-09 04:32:09,023 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:09,024 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:32:09,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 04:32:09,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:32:09,224 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:32:09,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:09,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1893759537, now seen corresponding path program 1 times [2024-11-09 04:32:09,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:09,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970755573] [2024-11-09 04:32:09,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:09,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:09,534 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 04:32:09,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:09,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970755573] [2024-11-09 04:32:09,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970755573] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:32:09,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:32:09,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:32:09,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322088450] [2024-11-09 04:32:09,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:32:09,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:32:09,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:09,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:32:09,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:32:09,538 INFO L87 Difference]: Start difference. First operand 118 states and 129 transitions. Second operand has 6 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 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) [2024-11-09 04:32:09,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:09,981 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2024-11-09 04:32:09,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:32:09,982 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 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 42 [2024-11-09 04:32:09,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:09,982 INFO L225 Difference]: With dead ends: 112 [2024-11-09 04:32:09,982 INFO L226 Difference]: Without dead ends: 112 [2024-11-09 04:32:09,983 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:32:09,983 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 22 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:09,984 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 332 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:32:09,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-09 04:32:09,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2024-11-09 04:32:09,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 74 states have (on average 1.5810810810810811) internal successors, (117), 107 states have internal predecessors, (117), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:32:09,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 123 transitions. [2024-11-09 04:32:09,987 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 123 transitions. Word has length 42 [2024-11-09 04:32:09,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:09,987 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 123 transitions. [2024-11-09 04:32:09,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 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) [2024-11-09 04:32:09,988 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 123 transitions. [2024-11-09 04:32:09,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 04:32:09,988 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:09,989 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:32:09,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-09 04:32:09,989 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:32:09,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:09,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1163218833, now seen corresponding path program 1 times [2024-11-09 04:32:09,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:09,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821087653] [2024-11-09 04:32:09,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:09,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:12,907 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:32:12,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:12,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821087653] [2024-11-09 04:32:12,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821087653] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:32:12,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283497003] [2024-11-09 04:32:12,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:12,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:32:12,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:32:12,909 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:32:12,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 04:32:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:13,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-11-09 04:32:13,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:32:13,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:32:13,982 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 04:32:13,983 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 11 treesize of output 11 [2024-11-09 04:32:14,192 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 04:32:14,352 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 04:32:14,353 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 1 case distinctions, treesize of input 41 treesize of output 38 [2024-11-09 04:32:14,667 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 04:32:14,667 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 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-09 04:32:14,859 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 25 [2024-11-09 04:32:15,034 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 04:32:15,035 INFO L378 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 22 [2024-11-09 04:32:15,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 04:32:15,052 INFO L378 Elim1Store]: Elim1 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 7 treesize of output 3 [2024-11-09 04:32:15,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:32:15,374 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 04:32:15,456 INFO L349 Elim1Store]: treesize reduction 72, result has 37.4 percent of original size [2024-11-09 04:32:15,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 57 [2024-11-09 04:32:15,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:32:15,483 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2024-11-09 04:32:15,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 50 [2024-11-09 04:32:15,780 INFO L378 Elim1Store]: Elim1 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 7 treesize of output 3 [2024-11-09 04:32:16,196 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 04:32:16,196 INFO L378 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 33 [2024-11-09 04:32:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:32:16,576 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:32:17,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283497003] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:32:17,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1545280756] [2024-11-09 04:32:17,301 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2024-11-09 04:32:17,301 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:32:17,301 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:32:17,301 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:32:17,302 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:32:18,512 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 8 for LOIs [2024-11-09 04:32:18,535 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:32:46,324 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9190#(and (= 5 |ULTIMATE.start_dll_circular_insert_~data#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~mid_index~0#1| 1) (= |ULTIMATE.start_dll_circular_insert_~head#1.offset| 0) (= |ULTIMATE.start_main_~uneq~0#1| 5) (<= 2 |ULTIMATE.start_dll_circular_insert_~head#1.base|) (exists ((|v_#memory_$Pointer$.offset_258| (Array Int (Array Int Int))) (|v_#memory_int_219| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_260| (Array Int (Array Int Int))) (|v_#memory_int_220| (Array Int (Array Int Int))) (|v_#memory_int_221| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_267| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_265| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.base_267| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (select |v_#memory_$Pointer$.base_267| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0))) |#memory_$Pointer$.base|) (<= 0 (select (select |v_#memory_$Pointer$.offset_260| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4)) (= |#memory_int| (store |v_#memory_int_221| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (select |v_#memory_int_221| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0 (select (select |#memory_int| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0)))) (= |v_#memory_$Pointer$.offset_260| (store (store |v_#memory_$Pointer$.offset_258| (select (select |v_#memory_$Pointer$.base_267| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) (store (select |v_#memory_$Pointer$.offset_258| (select (select |v_#memory_$Pointer$.base_267| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4)) (select (select |v_#memory_$Pointer$.offset_260| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) 0)) |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (select (store |v_#memory_$Pointer$.offset_258| (select (select |v_#memory_$Pointer$.base_267| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) (store (select |v_#memory_$Pointer$.offset_258| (select (select |v_#memory_$Pointer$.base_267| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4)) (select (select |v_#memory_$Pointer$.offset_260| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) 0)) |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4 (select (select |v_#memory_$Pointer$.offset_260| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4)))) (or (not (= (select (select |v_#memory_$Pointer$.offset_260| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) 0)) (not (= (select (select |v_#memory_$Pointer$.base_267| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) 0))) (= (store |v_#memory_int_219| (select (select |v_#memory_$Pointer$.base_267| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) (store (select |v_#memory_int_219| (select (select |v_#memory_$Pointer$.base_267| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4)) (select (select |v_#memory_$Pointer$.offset_260| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) (select (select |v_#memory_int_220| (select (select |v_#memory_$Pointer$.base_267| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4)) (select (select |v_#memory_$Pointer$.offset_260| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4)))) |v_#memory_int_220|) (= (store (store |v_#memory_$Pointer$.base_265| (select (select |v_#memory_$Pointer$.base_267| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) (store (select |v_#memory_$Pointer$.base_265| (select (select |v_#memory_$Pointer$.base_267| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4)) (select (select |v_#memory_$Pointer$.offset_260| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|)) |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (select (store |v_#memory_$Pointer$.base_265| (select (select |v_#memory_$Pointer$.base_267| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) (store (select |v_#memory_$Pointer$.base_265| (select (select |v_#memory_$Pointer$.base_267| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4)) (select (select |v_#memory_$Pointer$.offset_260| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|)) |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4 (select (select |v_#memory_$Pointer$.base_267| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4))) |v_#memory_$Pointer$.base_267|) (<= (+ 4 (select (select |v_#memory_$Pointer$.offset_260| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4)) (select |#length| (select (select |v_#memory_$Pointer$.base_267| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4))) (= (select |#valid| (select (select |v_#memory_$Pointer$.base_267| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4)) 1) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_260| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (select |v_#memory_$Pointer$.offset_260| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0 |ULTIMATE.start_dll_circular_insert_~last~1#1.offset|))) (= (store |v_#memory_int_220| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (select |v_#memory_int_220| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4 (select (select |v_#memory_int_221| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4))) |v_#memory_int_221|))) (= |ULTIMATE.start_dll_circular_insert_~new_node~0#1.offset| 0) (= 1 (select |#valid| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|)) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (not (= 1 (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0)))) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (<= 8 (select |#length| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|)))' at error location [2024-11-09 04:32:46,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:32:46,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:32:46,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 45 [2024-11-09 04:32:46,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136594559] [2024-11-09 04:32:46,324 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:32:46,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-09 04:32:46,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:46,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-09 04:32:46,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=5868, Unknown=6, NotChecked=0, Total=6162 [2024-11-09 04:32:46,327 INFO L87 Difference]: Start difference. First operand 112 states and 123 transitions. Second operand has 46 states, 35 states have (on average 2.085714285714286) internal successors, (73), 39 states have internal predecessors, (73), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 04:32:54,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:54,253 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2024-11-09 04:32:54,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 04:32:54,253 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 35 states have (on average 2.085714285714286) internal successors, (73), 39 states have internal predecessors, (73), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 44 [2024-11-09 04:32:54,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:54,254 INFO L225 Difference]: With dead ends: 113 [2024-11-09 04:32:54,254 INFO L226 Difference]: Without dead ends: 113 [2024-11-09 04:32:54,256 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2997 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=494, Invalid=8620, Unknown=6, NotChecked=0, Total=9120 [2024-11-09 04:32:54,256 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 189 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 1998 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 2021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:54,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 1293 Invalid, 2021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1998 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-09 04:32:54,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-09 04:32:54,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2024-11-09 04:32:54,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 74 states have (on average 1.5675675675675675) internal successors, (116), 106 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:32:54,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2024-11-09 04:32:54,260 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 44 [2024-11-09 04:32:54,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:54,261 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2024-11-09 04:32:54,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 35 states have (on average 2.085714285714286) internal successors, (73), 39 states have internal predecessors, (73), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 04:32:54,261 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2024-11-09 04:32:54,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 04:32:54,261 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:54,262 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:32:54,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 04:32:54,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:32:54,466 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:32:54,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:54,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1163218834, now seen corresponding path program 1 times [2024-11-09 04:32:54,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:54,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337216920] [2024-11-09 04:32:54,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:54,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:32:59,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:59,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337216920] [2024-11-09 04:32:59,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337216920] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:32:59,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576123935] [2024-11-09 04:32:59,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:59,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:32:59,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:32:59,343 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:32:59,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 04:33:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:00,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-11-09 04:33:00,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:33:00,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:33:00,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 04:33:01,219 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 04:33:01,220 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 11 treesize of output 11 [2024-11-09 04:33:01,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 04:33:01,672 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 04:33:01,723 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 04:33:02,018 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 04:33:02,019 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 1 case distinctions, treesize of input 66 treesize of output 57 [2024-11-09 04:33:02,059 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2024-11-09 04:33:02,774 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 04:33:02,775 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 1 case distinctions, treesize of input 59 treesize of output 52 [2024-11-09 04:33:02,789 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2024-11-09 04:33:03,143 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 30 [2024-11-09 04:33:03,187 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 26 [2024-11-09 04:33:03,485 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 04:33:03,485 INFO L378 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 52 [2024-11-09 04:33:03,498 INFO L378 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 33 treesize of output 13 [2024-11-09 04:33:11,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:33:11,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:33:11,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:33:11,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 37 [2024-11-09 04:33:11,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:33:11,427 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2024-11-09 04:33:11,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 78 [2024-11-09 04:33:11,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:33:11,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2024-11-09 04:33:11,708 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-09 04:33:11,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2024-11-09 04:33:14,811 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 04:33:14,811 INFO L378 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 52 [2024-11-09 04:33:14,830 INFO L378 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 40 treesize of output 16 [2024-11-09 04:33:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:33:15,492 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:33:19,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576123935] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:19,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1779150550] [2024-11-09 04:33:19,199 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2024-11-09 04:33:19,199 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:33:19,200 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:33:19,200 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:33:19,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:33:20,568 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 8 for LOIs [2024-11-09 04:33:20,621 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:34:16,228 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9694#(and (= 5 |ULTIMATE.start_dll_circular_insert_~data#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~mid_index~0#1| 1) (= |ULTIMATE.start_dll_circular_insert_~head#1.offset| 0) (= |ULTIMATE.start_main_~uneq~0#1| 5) (<= 2 |ULTIMATE.start_dll_circular_insert_~head#1.base|) (exists ((|v_#memory_$Pointer$.offset_291| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_293| (Array Int (Array Int Int))) (|v_#memory_int_243| (Array Int (Array Int Int))) (|v_#memory_int_244| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_300| (Array Int (Array Int Int))) (|v_#memory_int_245| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_298| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_245| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (select |v_#memory_int_245| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0 (select (select |#memory_int| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0))) |#memory_int|) (= (store |v_#memory_int_243| (select (select |v_#memory_$Pointer$.base_300| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) (store (select |v_#memory_int_243| (select (select |v_#memory_$Pointer$.base_300| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4)) (select (select |v_#memory_$Pointer$.offset_293| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) (select (select |v_#memory_int_244| (select (select |v_#memory_$Pointer$.base_300| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4)) (select (select |v_#memory_$Pointer$.offset_293| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4)))) |v_#memory_int_244|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_293| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (select |v_#memory_$Pointer$.offset_293| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0)))) (= (store |v_#memory_int_244| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (select |v_#memory_int_244| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4 (select (select |v_#memory_int_245| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4))) |v_#memory_int_245|) (or (not (= (select (select |v_#memory_$Pointer$.base_300| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) 0)) (not (= (select (select |v_#memory_$Pointer$.offset_293| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) 0))) (<= (+ (select (select |v_#memory_$Pointer$.offset_293| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) 4) (select |#length| (select (select |v_#memory_$Pointer$.base_300| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4))) (= (store (store |v_#memory_$Pointer$.base_298| (select (select |v_#memory_$Pointer$.base_300| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) (store (select |v_#memory_$Pointer$.base_298| (select (select |v_#memory_$Pointer$.base_300| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4)) (select (select |v_#memory_$Pointer$.offset_293| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|)) |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (select (store |v_#memory_$Pointer$.base_298| (select (select |v_#memory_$Pointer$.base_300| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) (store (select |v_#memory_$Pointer$.base_298| (select (select |v_#memory_$Pointer$.base_300| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4)) (select (select |v_#memory_$Pointer$.offset_293| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|)) |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4 (select (select |v_#memory_$Pointer$.base_300| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4))) |v_#memory_$Pointer$.base_300|) (= (store (store |v_#memory_$Pointer$.offset_291| (select (select |v_#memory_$Pointer$.base_300| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) (store (select |v_#memory_$Pointer$.offset_291| (select (select |v_#memory_$Pointer$.base_300| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4)) (select (select |v_#memory_$Pointer$.offset_293| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) 0)) |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (select (store |v_#memory_$Pointer$.offset_291| (select (select |v_#memory_$Pointer$.base_300| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) (store (select |v_#memory_$Pointer$.offset_291| (select (select |v_#memory_$Pointer$.base_300| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4)) (select (select |v_#memory_$Pointer$.offset_293| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) 0)) |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4 (select (select |v_#memory_$Pointer$.offset_293| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4))) |v_#memory_$Pointer$.offset_293|) (= (select |#valid| (select (select |v_#memory_$Pointer$.base_300| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4)) 1) (= (store |v_#memory_$Pointer$.base_300| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| (store (select |v_#memory_$Pointer$.base_300| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0))) |#memory_$Pointer$.base|) (<= 0 (select (select |v_#memory_$Pointer$.offset_293| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4)))) (= |ULTIMATE.start_dll_circular_insert_~new_node~0#1.offset| 0) (= 1 (select |#valid| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|)) (= |ULTIMATE.start_main_~data~0#1| 1) (or (< (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0)) (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0) 8)) (< (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0) 4) 0)) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (<= 8 (select |#length| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|)))' at error location [2024-11-09 04:34:16,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:34:16,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:34:16,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 47 [2024-11-09 04:34:16,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019248699] [2024-11-09 04:34:16,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:34:16,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-09 04:34:16,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:34:16,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-09 04:34:16,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=6180, Unknown=10, NotChecked=0, Total=6480 [2024-11-09 04:34:16,233 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 48 states, 37 states have (on average 1.972972972972973) internal successors, (73), 40 states have internal predecessors, (73), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 04:34:47,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:34:47,873 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2024-11-09 04:34:47,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 04:34:47,874 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 37 states have (on average 1.972972972972973) internal successors, (73), 40 states have internal predecessors, (73), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 44 [2024-11-09 04:34:47,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:34:47,875 INFO L225 Difference]: With dead ends: 115 [2024-11-09 04:34:47,875 INFO L226 Difference]: Without dead ends: 115 [2024-11-09 04:34:47,877 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3020 ImplicationChecksByTransitivity, 83.4s TimeCoverageRelationStatistics Valid=456, Invalid=9434, Unknown=10, NotChecked=0, Total=9900 [2024-11-09 04:34:47,878 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 220 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 2675 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 2684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:34:47,878 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1369 Invalid, 2684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2675 Invalid, 0 Unknown, 0 Unchecked, 21.0s Time] [2024-11-09 04:34:47,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-09 04:34:47,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2024-11-09 04:34:47,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 74 states have (on average 1.554054054054054) internal successors, (115), 105 states have internal predecessors, (115), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:34:47,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-11-09 04:34:47,882 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 44 [2024-11-09 04:34:47,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:34:47,883 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-11-09 04:34:47,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 37 states have (on average 1.972972972972973) internal successors, (73), 40 states have internal predecessors, (73), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 04:34:47,883 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-11-09 04:34:47,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 04:34:47,884 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:34:47,884 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:34:47,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 04:34:48,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:34:48,085 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr45REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:34:48,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:34:48,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1161804659, now seen corresponding path program 1 times [2024-11-09 04:34:48,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:34:48,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412860996] [2024-11-09 04:34:48,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:34:48,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:34:48,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:34:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 04:34:48,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:34:48,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412860996] [2024-11-09 04:34:48,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412860996] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:34:48,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:34:48,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:34:48,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735802868] [2024-11-09 04:34:48,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:34:48,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:34:48,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:34:48,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:34:48,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:34:48,771 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 6 states, 4 states have (on average 7.5) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:34:49,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:34:49,525 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2024-11-09 04:34:49,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:34:49,525 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 7.5) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2024-11-09 04:34:49,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:34:49,526 INFO L225 Difference]: With dead ends: 107 [2024-11-09 04:34:49,526 INFO L226 Difference]: Without dead ends: 107 [2024-11-09 04:34:49,526 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:34:49,527 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 167 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 04:34:49,527 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 142 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 04:34:49,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-09 04:34:49,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2024-11-09 04:34:49,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 74 states have (on average 1.5) internal successors, (111), 101 states have internal predecessors, (111), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:34:49,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2024-11-09 04:34:49,531 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 46 [2024-11-09 04:34:49,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:34:49,531 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2024-11-09 04:34:49,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 7.5) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:34:49,531 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2024-11-09 04:34:49,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 04:34:49,532 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:34:49,532 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:34:49,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-09 04:34:49,532 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:34:49,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:34:49,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1656211498, now seen corresponding path program 1 times [2024-11-09 04:34:49,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:34:49,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668645502] [2024-11-09 04:34:49,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:34:49,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:34:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:35:01,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:35:01,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668645502] [2024-11-09 04:35:01,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668645502] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:35:01,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476159791] [2024-11-09 04:35:01,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:01,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:01,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:35:01,445 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:35:01,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 04:35:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:01,753 INFO L255 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-09 04:35:01,757 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:35:03,885 INFO L378 Elim1Store]: Elim1 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 9 treesize of output 5 [2024-11-09 04:35:05,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:35:05,940 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-09 04:35:06,042 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 04:35:06,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2024-11-09 04:35:07,517 INFO L349 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2024-11-09 04:35:07,517 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 28 [2024-11-09 04:35:08,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:35:08,301 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2024-11-09 04:35:08,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2024-11-09 04:35:08,347 INFO L378 Elim1Store]: Elim1 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 5 treesize of output 3 [2024-11-09 04:35:08,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:35:08,394 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-09 04:35:08,679 INFO L349 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2024-11-09 04:35:08,679 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2024-11-09 04:35:11,660 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:35:11,660 INFO L378 Elim1Store]: Elim1 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 65 treesize of output 51 [2024-11-09 04:35:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 04:35:12,165 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:35:12,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476159791] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:35:12,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:35:12,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [31] total 41 [2024-11-09 04:35:12,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576734991] [2024-11-09 04:35:12,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:35:12,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 04:35:12,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:35:12,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 04:35:12,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1597, Unknown=1, NotChecked=0, Total=1722 [2024-11-09 04:35:12,168 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 13 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:35:16,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:35:18,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:35:23,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:35:30,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:35:32,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:35:35,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:35:37,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:35:39,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:35:41,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:35:43,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:35:43,286 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2024-11-09 04:35:43,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 04:35:43,286 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2024-11-09 04:35:43,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:35:43,287 INFO L225 Difference]: With dead ends: 108 [2024-11-09 04:35:43,287 INFO L226 Difference]: Without dead ends: 108 [2024-11-09 04:35:43,287 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=169, Invalid=2083, Unknown=4, NotChecked=0, Total=2256 [2024-11-09 04:35:43,288 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 143 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 29 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:35:43,288 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 413 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 571 Invalid, 9 Unknown, 0 Unchecked, 23.2s Time] [2024-11-09 04:35:43,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-09 04:35:43,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2024-11-09 04:35:43,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 75 states have (on average 1.4666666666666666) internal successors, (110), 99 states have internal predecessors, (110), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:35:43,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 116 transitions. [2024-11-09 04:35:43,290 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 116 transitions. Word has length 47 [2024-11-09 04:35:43,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:35:43,290 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 116 transitions. [2024-11-09 04:35:43,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:35:43,291 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 116 transitions. [2024-11-09 04:35:43,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 04:35:43,291 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:35:43,291 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:35:43,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-09 04:35:43,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 04:35:43,492 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:35:43,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:35:43,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1656211499, now seen corresponding path program 1 times [2024-11-09 04:35:43,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:35:43,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901469371] [2024-11-09 04:35:43,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:43,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:35:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:35:57,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:35:57,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901469371] [2024-11-09 04:35:57,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901469371] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:35:57,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755384732] [2024-11-09 04:35:57,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:57,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:57,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:35:57,318 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:35:57,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 04:35:57,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:57,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-11-09 04:35:57,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:35:57,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:35:57,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 04:35:58,215 INFO L378 Elim1Store]: Elim1 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 5 treesize of output 3 [2024-11-09 04:35:58,232 INFO L378 Elim1Store]: Elim1 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 5 treesize of output 3 [2024-11-09 04:35:58,696 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-09 04:35:58,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:35:58,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 04:35:58,931 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 04:35:58,931 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 11 treesize of output 11 [2024-11-09 04:35:59,556 INFO L378 Elim1Store]: Elim1 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 5 treesize of output 3 [2024-11-09 04:36:01,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:36:01,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2024-11-09 04:36:04,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 04:36:04,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:36:04,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 04:36:04,351 INFO L378 Elim1Store]: Elim1 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 7 treesize of output 3 [2024-11-09 04:36:06,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:36:06,960 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 04:36:07,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:36:07,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:36:07,131 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 04:36:07,131 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 21 treesize of output 26 [2024-11-09 04:36:07,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:36:07,176 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2024-11-09 04:36:09,691 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-11-09 04:36:09,691 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2024-11-09 04:36:09,849 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-09 04:36:09,849 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2024-11-09 04:36:11,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:36:11,515 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2024-11-09 04:36:11,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 79 [2024-11-09 04:36:11,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:36:11,717 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2024-11-09 04:36:11,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 88 [2024-11-09 04:36:12,004 INFO L378 Elim1Store]: Elim1 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 5 treesize of output 3 [2024-11-09 04:36:12,800 INFO L378 Elim1Store]: Elim1 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 5 treesize of output 3 [2024-11-09 04:36:13,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:36:13,666 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 04:36:13,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:36:13,764 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2024-11-09 04:36:14,097 INFO L349 Elim1Store]: treesize reduction 31, result has 26.2 percent of original size [2024-11-09 04:36:14,097 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 22 [2024-11-09 04:36:14,276 INFO L349 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2024-11-09 04:36:14,276 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2024-11-09 04:36:18,299 INFO L349 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2024-11-09 04:36:18,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 104 [2024-11-09 04:36:18,449 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:36:18,449 INFO L378 Elim1Store]: Elim1 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 84 treesize of output 88 [2024-11-09 04:36:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 10 not checked. [2024-11-09 04:36:22,120 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:36:25,656 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3563 (Array Int Int)) (|ULTIMATE.start_dll_circular_insert_~last~1#1.offset| Int)) (let ((.cse1 (+ |ULTIMATE.start_dll_circular_insert_~last~1#1.offset| 4))) (or (forall ((|ULTIMATE.start_dll_circular_insert_~last~1#1.base| Int)) (or (< (select |c_#length| |ULTIMATE.start_dll_circular_insert_~last~1#1.base|) (+ |ULTIMATE.start_dll_circular_insert_~last~1#1.offset| 8)) (< 0 (+ 9 (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3563))) (store .cse0 |ULTIMATE.start_dll_circular_insert_~last~1#1.base| (store (select .cse0 |ULTIMATE.start_dll_circular_insert_~last~1#1.base|) .cse1 |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (< .cse1 0)))) (forall ((v_ArrVal_3562 (Array Int Int)) (v_ArrVal_3563 (Array Int Int)) (|ULTIMATE.start_dll_circular_insert_~last~1#1.offset| Int)) (let ((.cse3 (+ |ULTIMATE.start_dll_circular_insert_~last~1#1.offset| 4))) (or (forall ((|ULTIMATE.start_dll_circular_insert_~last~1#1.base| Int)) (or (< (+ (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3563))) (store .cse2 |ULTIMATE.start_dll_circular_insert_~last~1#1.base| (store (select .cse2 |ULTIMATE.start_dll_circular_insert_~last~1#1.base|) .cse3 |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 11) (select |c_#length| (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3562))) (store .cse4 |ULTIMATE.start_dll_circular_insert_~last~1#1.base| (store (select .cse4 |ULTIMATE.start_dll_circular_insert_~last~1#1.base|) .cse3 |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (< (select |c_#length| |ULTIMATE.start_dll_circular_insert_~last~1#1.base|) (+ |ULTIMATE.start_dll_circular_insert_~last~1#1.offset| 8)))) (< .cse3 0))))) is different from false [2024-11-09 04:36:52,678 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-09 04:36:52,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2024-11-09 04:36:52,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2024-11-09 04:36:52,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [454978794] [2024-11-09 04:36:52,681 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2024-11-09 04:36:52,681 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:36:52,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:36:52,682 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:36:52,682 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:36:52,691 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:326) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:220) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 44 more [2024-11-09 04:36:52,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:36:52,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2024-11-09 04:36:52,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276203715] [2024-11-09 04:36:52,695 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 04:36:52,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 04:36:52,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:36:52,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 04:36:52,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2790, Unknown=9, NotChecked=214, Total=3192 [2024-11-09 04:36:52,697 INFO L87 Difference]: Start difference. First operand 104 states and 116 transitions. Second operand has 32 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:36:52,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 04:36:52,698 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 33.6s TimeCoverageRelationStatistics Valid=179, Invalid=2790, Unknown=9, NotChecked=214, Total=3192 [2024-11-09 04:36:52,699 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:36:52,699 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:36:52,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-09 04:36:52,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 04:36:52,900 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@65c762e0 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:460) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:104) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.chooseFalseSuccessor2(BasicAbstractInterpolantAutomaton.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:73) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:373) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2024-11-09 04:36:52,903 INFO L158 Benchmark]: Toolchain (without parser) took 444646.46ms. Allocated memory was 169.9MB in the beginning and 318.8MB in the end (delta: 148.9MB). Free memory was 133.1MB in the beginning and 230.1MB in the end (delta: -97.0MB). Peak memory consumption was 54.1MB. Max. memory is 16.1GB. [2024-11-09 04:36:52,904 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 100.7MB. Free memory is still 45.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 04:36:52,904 INFO L158 Benchmark]: CACSL2BoogieTranslator took 622.82ms. Allocated memory is still 169.9MB. Free memory was 133.1MB in the beginning and 112.2MB in the end (delta: 20.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-11-09 04:36:52,904 INFO L158 Benchmark]: Boogie Procedure Inliner took 64.31ms. Allocated memory is still 169.9MB. Free memory was 112.2MB in the beginning and 109.7MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 04:36:52,904 INFO L158 Benchmark]: Boogie Preprocessor took 45.77ms. Allocated memory is still 169.9MB. Free memory was 109.7MB in the beginning and 107.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 04:36:52,905 INFO L158 Benchmark]: RCFGBuilder took 966.43ms. Allocated memory was 169.9MB in the beginning and 220.2MB in the end (delta: 50.3MB). Free memory was 107.6MB in the beginning and 180.0MB in the end (delta: -72.4MB). Peak memory consumption was 44.5MB. Max. memory is 16.1GB. [2024-11-09 04:36:52,905 INFO L158 Benchmark]: TraceAbstraction took 442940.05ms. Allocated memory was 220.2MB in the beginning and 318.8MB in the end (delta: 98.6MB). Free memory was 178.9MB in the beginning and 230.1MB in the end (delta: -51.1MB). Peak memory consumption was 47.4MB. Max. memory is 16.1GB. [2024-11-09 04:36:52,906 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 100.7MB. Free memory is still 45.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 622.82ms. Allocated memory is still 169.9MB. Free memory was 133.1MB in the beginning and 112.2MB in the end (delta: 20.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 64.31ms. Allocated memory is still 169.9MB. Free memory was 112.2MB in the beginning and 109.7MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.77ms. Allocated memory is still 169.9MB. Free memory was 109.7MB in the beginning and 107.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 966.43ms. Allocated memory was 169.9MB in the beginning and 220.2MB in the end (delta: 50.3MB). Free memory was 107.6MB in the beginning and 180.0MB in the end (delta: -72.4MB). Peak memory consumption was 44.5MB. Max. memory is 16.1GB. * TraceAbstraction took 442940.05ms. Allocated memory was 220.2MB in the beginning and 318.8MB in the end (delta: 98.6MB). Free memory was 178.9MB in the beginning and 230.1MB in the end (delta: -51.1MB). Peak memory consumption was 47.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@65c762e0 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@65c762e0: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1b81f923e96224472f8219a473f794261ff02356a47c6b09b527f0fc600725a8 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 04:36:55,136 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 04:36:55,251 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2024-11-09 04:36:55,257 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 04:36:55,258 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 04:36:55,299 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 04:36:55,300 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 04:36:55,300 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 04:36:55,301 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 04:36:55,301 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 04:36:55,302 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 04:36:55,302 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 04:36:55,303 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 04:36:55,303 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 04:36:55,303 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 04:36:55,304 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 04:36:55,305 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 04:36:55,305 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 04:36:55,305 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 04:36:55,306 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 04:36:55,306 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 04:36:55,307 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 04:36:55,307 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 04:36:55,307 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 04:36:55,308 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 04:36:55,308 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 04:36:55,308 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 04:36:55,309 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 04:36:55,309 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-09 04:36:55,310 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 04:36:55,310 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-09 04:36:55,310 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 04:36:55,311 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 04:36:55,311 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 04:36:55,311 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 04:36:55,312 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 04:36:55,312 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 04:36:55,312 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 04:36:55,313 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:36:55,313 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 04:36:55,314 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 04:36:55,315 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2024-11-09 04:36:55,316 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-09 04:36:55,316 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 04:36:55,316 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 04:36:55,316 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b81f923e96224472f8219a473f794261ff02356a47c6b09b527f0fc600725a8 [2024-11-09 04:36:55,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 04:36:55,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 04:36:55,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 04:36:55,746 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 04:36:55,747 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 04:36:55,748 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i Unable to find full path for "g++" [2024-11-09 04:36:57,884 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 04:36:58,202 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 04:36:58,202 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/sv-benchmarks/c/list-simple/dll2c_insert_unequal.i [2024-11-09 04:36:58,220 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/data/e2dfbb32e/b8729ae502a5473aa08268a6d841b3de/FLAG0b012f6a6 [2024-11-09 04:36:58,240 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/data/e2dfbb32e/b8729ae502a5473aa08268a6d841b3de [2024-11-09 04:36:58,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 04:36:58,244 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 04:36:58,245 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 04:36:58,245 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 04:36:58,249 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 04:36:58,250 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:36:58" (1/1) ... [2024-11-09 04:36:58,251 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17486c93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:36:58, skipping insertion in model container [2024-11-09 04:36:58,251 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:36:58" (1/1) ... [2024-11-09 04:36:58,309 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 04:36:58,751 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:36:58,766 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 04:36:58,830 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:36:58,935 INFO L204 MainTranslator]: Completed translation [2024-11-09 04:36:58,935 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:36:58 WrapperNode [2024-11-09 04:36:58,936 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 04:36:58,937 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 04:36:58,937 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 04:36:58,937 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 04:36:58,953 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:36:58" (1/1) ... [2024-11-09 04:36:58,976 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:36:58" (1/1) ... [2024-11-09 04:36:59,013 INFO L138 Inliner]: procedures = 130, calls = 59, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 191 [2024-11-09 04:36:59,016 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 04:36:59,017 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 04:36:59,017 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 04:36:59,017 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 04:36:59,027 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:36:58" (1/1) ... [2024-11-09 04:36:59,028 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:36:58" (1/1) ... [2024-11-09 04:36:59,037 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:36:58" (1/1) ... [2024-11-09 04:36:59,038 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:36:58" (1/1) ... [2024-11-09 04:36:59,059 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:36:58" (1/1) ... [2024-11-09 04:36:59,065 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:36:58" (1/1) ... [2024-11-09 04:36:59,071 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:36:58" (1/1) ... [2024-11-09 04:36:59,073 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:36:58" (1/1) ... [2024-11-09 04:36:59,081 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 04:36:59,082 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 04:36:59,083 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 04:36:59,083 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 04:36:59,089 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:36:58" (1/1) ... [2024-11-09 04:36:59,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:36:59,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:36:59,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 04:36:59,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 04:36:59,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2024-11-09 04:36:59,164 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-09 04:36:59,164 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-09 04:36:59,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 04:36:59,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 04:36:59,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 04:36:59,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-09 04:36:59,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-09 04:36:59,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 04:36:59,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2024-11-09 04:36:59,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-09 04:36:59,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2024-11-09 04:36:59,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 04:36:59,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 04:36:59,356 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 04:36:59,358 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 04:37:00,396 INFO L? ?]: Removed 201 outVars from TransFormulas that were not future-live. [2024-11-09 04:37:00,397 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 04:37:00,422 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 04:37:00,424 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-09 04:37:00,425 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:37:00 BoogieIcfgContainer [2024-11-09 04:37:00,426 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 04:37:00,429 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 04:37:00,430 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 04:37:00,434 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 04:37:00,434 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:36:58" (1/3) ... [2024-11-09 04:37:00,436 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7db4a8e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:37:00, skipping insertion in model container [2024-11-09 04:37:00,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:36:58" (2/3) ... [2024-11-09 04:37:00,437 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7db4a8e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:37:00, skipping insertion in model container [2024-11-09 04:37:00,437 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:37:00" (3/3) ... [2024-11-09 04:37:00,439 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_insert_unequal.i [2024-11-09 04:37:00,458 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 04:37:00,459 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 82 error locations. [2024-11-09 04:37:00,513 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 04:37:00,518 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@1a9c2446, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 04:37:00,518 INFO L334 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2024-11-09 04:37:00,524 INFO L276 IsEmpty]: Start isEmpty. Operand has 180 states, 93 states have (on average 2.096774193548387) internal successors, (195), 175 states have internal predecessors, (195), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:37:00,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 04:37:00,531 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:00,532 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 04:37:00,533 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:37:00,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:00,540 INFO L85 PathProgramCache]: Analyzing trace with hash 897919794, now seen corresponding path program 1 times [2024-11-09 04:37:00,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:37:00,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [726727590] [2024-11-09 04:37:00,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:00,569 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:37:00,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:37:00,574 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:37:00,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-09 04:37:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:00,717 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:37:00,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:00,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-09 04:37:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:37:00,821 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:37:00,822 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:37:00,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [726727590] [2024-11-09 04:37:00,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [726727590] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:37:00,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:37:00,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:37:00,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538356027] [2024-11-09 04:37:00,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:37:00,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:37:00,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:37:00,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:37:00,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:37:00,866 INFO L87 Difference]: Start difference. First operand has 180 states, 93 states have (on average 2.096774193548387) internal successors, (195), 175 states have internal predecessors, (195), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:37:01,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:01,255 INFO L93 Difference]: Finished difference Result 176 states and 193 transitions. [2024-11-09 04:37:01,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:37:01,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-09 04:37:01,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:01,271 INFO L225 Difference]: With dead ends: 176 [2024-11-09 04:37:01,272 INFO L226 Difference]: Without dead ends: 173 [2024-11-09 04:37:01,274 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:37:01,279 INFO L432 NwaCegarLoop]: 184 mSDtfsCounter, 3 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:01,281 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 290 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:37:01,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-09 04:37:01,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2024-11-09 04:37:01,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 90 states have (on average 2.033333333333333) internal successors, (183), 168 states have internal predecessors, (183), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:37:01,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 189 transitions. [2024-11-09 04:37:01,345 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 189 transitions. Word has length 6 [2024-11-09 04:37:01,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:01,346 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 189 transitions. [2024-11-09 04:37:01,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:37:01,346 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 189 transitions. [2024-11-09 04:37:01,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 04:37:01,347 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:01,347 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 04:37:01,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2024-11-09 04:37:01,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:37:01,548 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:37:01,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:01,549 INFO L85 PathProgramCache]: Analyzing trace with hash 897919795, now seen corresponding path program 1 times [2024-11-09 04:37:01,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:37:01,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2092929257] [2024-11-09 04:37:01,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:01,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:37:01,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:37:01,553 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:37:01,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-11-09 04:37:01,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:01,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 04:37:01,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:01,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:37:01,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:37:01,657 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:37:01,658 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:37:01,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2092929257] [2024-11-09 04:37:01,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2092929257] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:37:01,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:37:01,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:37:01,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042341838] [2024-11-09 04:37:01,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:37:01,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:37:01,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:37:01,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:37:01,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:37:01,662 INFO L87 Difference]: Start difference. First operand 173 states and 189 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:37:02,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:02,068 INFO L93 Difference]: Finished difference Result 170 states and 186 transitions. [2024-11-09 04:37:02,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:37:02,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-09 04:37:02,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:02,070 INFO L225 Difference]: With dead ends: 170 [2024-11-09 04:37:02,070 INFO L226 Difference]: Without dead ends: 170 [2024-11-09 04:37:02,071 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:37:02,072 INFO L432 NwaCegarLoop]: 181 mSDtfsCounter, 3 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:02,072 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 291 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:37:02,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-09 04:37:02,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2024-11-09 04:37:02,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 90 states have (on average 2.0) internal successors, (180), 165 states have internal predecessors, (180), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:37:02,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 186 transitions. [2024-11-09 04:37:02,096 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 186 transitions. Word has length 6 [2024-11-09 04:37:02,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:02,096 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 186 transitions. [2024-11-09 04:37:02,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:37:02,096 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 186 transitions. [2024-11-09 04:37:02,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-09 04:37:02,097 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:02,097 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:02,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-11-09 04:37:02,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:37:02,298 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:37:02,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:02,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1610726812, now seen corresponding path program 1 times [2024-11-09 04:37:02,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:37:02,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [257558347] [2024-11-09 04:37:02,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:02,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:37:02,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:37:02,314 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:37:02,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-11-09 04:37:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:02,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 04:37:02,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:37:02,427 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:37:02,428 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:37:02,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [257558347] [2024-11-09 04:37:02,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [257558347] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:37:02,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:37:02,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:37:02,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819837481] [2024-11-09 04:37:02,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:37:02,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:37:02,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:37:02,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:37:02,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:37:02,431 INFO L87 Difference]: Start difference. First operand 170 states and 186 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 04:37:02,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:02,455 INFO L93 Difference]: Finished difference Result 182 states and 200 transitions. [2024-11-09 04:37:02,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:37:02,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-09 04:37:02,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:02,458 INFO L225 Difference]: With dead ends: 182 [2024-11-09 04:37:02,458 INFO L226 Difference]: Without dead ends: 182 [2024-11-09 04:37:02,458 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:37:02,459 INFO L432 NwaCegarLoop]: 183 mSDtfsCounter, 11 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:02,460 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 360 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:37:02,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-09 04:37:02,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 172. [2024-11-09 04:37:02,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 92 states have (on average 1.9782608695652173) internal successors, (182), 167 states have internal predecessors, (182), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:37:02,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 188 transitions. [2024-11-09 04:37:02,471 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 188 transitions. Word has length 14 [2024-11-09 04:37:02,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:02,472 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 188 transitions. [2024-11-09 04:37:02,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 04:37:02,472 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 188 transitions. [2024-11-09 04:37:02,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 04:37:02,473 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:02,473 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:02,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2024-11-09 04:37:02,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:37:02,675 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:37:02,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:02,676 INFO L85 PathProgramCache]: Analyzing trace with hash -561192986, now seen corresponding path program 1 times [2024-11-09 04:37:02,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:37:02,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321421198] [2024-11-09 04:37:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:02,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:37:02,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:37:02,683 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:37:02,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-11-09 04:37:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:02,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 04:37:02,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:02,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-09 04:37:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:37:02,926 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:37:02,927 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:37:02,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321421198] [2024-11-09 04:37:02,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321421198] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:37:02,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:37:02,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:37:02,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823526366] [2024-11-09 04:37:02,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:37:02,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:37:02,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:37:02,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:37:02,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:37:02,932 INFO L87 Difference]: Start difference. First operand 172 states and 188 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:37:03,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:03,741 INFO L93 Difference]: Finished difference Result 171 states and 187 transitions. [2024-11-09 04:37:03,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:37:03,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2024-11-09 04:37:03,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:03,743 INFO L225 Difference]: With dead ends: 171 [2024-11-09 04:37:03,743 INFO L226 Difference]: Without dead ends: 171 [2024-11-09 04:37:03,744 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:37:03,745 INFO L432 NwaCegarLoop]: 174 mSDtfsCounter, 6 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:03,745 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 560 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 04:37:03,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-09 04:37:03,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2024-11-09 04:37:03,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 92 states have (on average 1.9673913043478262) internal successors, (181), 166 states have internal predecessors, (181), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:37:03,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 187 transitions. [2024-11-09 04:37:03,763 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 187 transitions. Word has length 25 [2024-11-09 04:37:03,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:03,764 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 187 transitions. [2024-11-09 04:37:03,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:37:03,765 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 187 transitions. [2024-11-09 04:37:03,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 04:37:03,765 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:03,766 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:03,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-11-09 04:37:03,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:37:03,969 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:37:03,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:03,969 INFO L85 PathProgramCache]: Analyzing trace with hash -561192985, now seen corresponding path program 1 times [2024-11-09 04:37:03,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:37:03,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249501304] [2024-11-09 04:37:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:03,970 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:37:03,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:37:03,973 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:37:03,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-11-09 04:37:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:04,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 04:37:04,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:04,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:37:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:37:04,240 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:37:04,241 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:37:04,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249501304] [2024-11-09 04:37:04,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249501304] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:37:04,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:37:04,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:37:04,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966875664] [2024-11-09 04:37:04,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:37:04,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:37:04,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:37:04,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:37:04,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:37:04,243 INFO L87 Difference]: Start difference. First operand 171 states and 187 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:37:05,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:05,138 INFO L93 Difference]: Finished difference Result 170 states and 186 transitions. [2024-11-09 04:37:05,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:37:05,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2024-11-09 04:37:05,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:05,143 INFO L225 Difference]: With dead ends: 170 [2024-11-09 04:37:05,144 INFO L226 Difference]: Without dead ends: 170 [2024-11-09 04:37:05,144 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:37:05,145 INFO L432 NwaCegarLoop]: 174 mSDtfsCounter, 6 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:05,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 584 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 04:37:05,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-09 04:37:05,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2024-11-09 04:37:05,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 92 states have (on average 1.9565217391304348) internal successors, (180), 165 states have internal predecessors, (180), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:37:05,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 186 transitions. [2024-11-09 04:37:05,153 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 186 transitions. Word has length 25 [2024-11-09 04:37:05,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:05,154 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 186 transitions. [2024-11-09 04:37:05,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:37:05,154 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 186 transitions. [2024-11-09 04:37:05,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 04:37:05,155 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:05,155 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:05,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2024-11-09 04:37:05,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:37:05,359 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:37:05,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:05,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1859419463, now seen corresponding path program 1 times [2024-11-09 04:37:05,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:37:05,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [860559270] [2024-11-09 04:37:05,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:05,360 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:37:05,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:37:05,363 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:37:05,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-11-09 04:37:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:05,517 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 04:37:05,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:05,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-09 04:37:05,621 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= (_ bv0 1) (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-09 04:37:05,730 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-09 04:37:05,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-09 04:37:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2024-11-09 04:37:05,749 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:37:06,107 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:37:06,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [860559270] [2024-11-09 04:37:06,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [860559270] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:37:06,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [476965454] [2024-11-09 04:37:06,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:06,108 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 04:37:06,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 04:37:06,111 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 04:37:06,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2024-11-09 04:37:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:06,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 04:37:06,391 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:06,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-09 04:37:06,504 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-09 04:37:06,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-11-09 04:37:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:37:06,557 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:37:06,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [476965454] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:37:06,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:37:06,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 6] total 11 [2024-11-09 04:37:06,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099053548] [2024-11-09 04:37:06,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:37:06,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 04:37:06,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:37:06,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 04:37:06,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=86, Unknown=1, NotChecked=18, Total=132 [2024-11-09 04:37:06,559 INFO L87 Difference]: Start difference. First operand 170 states and 186 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:37:08,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:08,056 INFO L93 Difference]: Finished difference Result 175 states and 194 transitions. [2024-11-09 04:37:08,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 04:37:08,057 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2024-11-09 04:37:08,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:08,058 INFO L225 Difference]: With dead ends: 175 [2024-11-09 04:37:08,058 INFO L226 Difference]: Without dead ends: 175 [2024-11-09 04:37:08,059 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=86, Unknown=1, NotChecked=18, Total=132 [2024-11-09 04:37:08,061 INFO L432 NwaCegarLoop]: 169 mSDtfsCounter, 0 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:08,061 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 899 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 04:37:08,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-09 04:37:08,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2024-11-09 04:37:08,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 96 states have (on average 1.9375) internal successors, (186), 169 states have internal predecessors, (186), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 04:37:08,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 194 transitions. [2024-11-09 04:37:08,076 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 194 transitions. Word has length 27 [2024-11-09 04:37:08,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:08,077 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 194 transitions. [2024-11-09 04:37:08,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:37:08,077 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 194 transitions. [2024-11-09 04:37:08,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 04:37:08,078 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:08,078 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:08,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-11-09 04:37:08,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2024-11-09 04:37:08,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt [2024-11-09 04:37:08,479 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:37:08,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:08,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1859419464, now seen corresponding path program 1 times [2024-11-09 04:37:08,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:37:08,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329700843] [2024-11-09 04:37:08,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:08,481 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:37:08,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:37:08,482 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:37:08,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-11-09 04:37:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:08,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 04:37:08,672 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:08,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-09 04:37:08,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:37:08,907 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-09 04:37:08,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:37:08,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 04:37:08,997 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-09 04:37:08,997 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 13 treesize of output 13 [2024-11-09 04:37:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2024-11-09 04:37:09,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:09,276 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:37:09,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329700843] [2024-11-09 04:37:09,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329700843] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:37:09,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1390641998] [2024-11-09 04:37:09,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:09,277 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 04:37:09,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 04:37:09,279 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 04:37:09,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2024-11-09 04:37:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:09,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 04:37:09,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:09,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:37:09,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-09 04:37:09,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:37:09,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 04:37:09,827 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-09 04:37:09,827 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 13 treesize of output 13 [2024-11-09 04:37:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2024-11-09 04:37:09,848 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:10,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1390641998] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:37:10,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018492133] [2024-11-09 04:37:10,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:10,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:10,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:37:10,033 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:37:10,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 04:37:10,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:10,167 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 04:37:10,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:10,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:37:10,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:37:10,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 04:37:10,429 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-09 04:37:10,429 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 13 treesize of output 13 [2024-11-09 04:37:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2024-11-09 04:37:10,456 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:10,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018492133] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:37:10,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:37:10,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 9 [2024-11-09 04:37:10,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279185781] [2024-11-09 04:37:10,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:37:10,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 04:37:10,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:37:10,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 04:37:10,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2024-11-09 04:37:10,640 INFO L87 Difference]: Start difference. First operand 175 states and 194 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:37:12,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:12,026 INFO L93 Difference]: Finished difference Result 175 states and 193 transitions. [2024-11-09 04:37:12,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 04:37:12,027 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2024-11-09 04:37:12,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:12,028 INFO L225 Difference]: With dead ends: 175 [2024-11-09 04:37:12,028 INFO L226 Difference]: Without dead ends: 175 [2024-11-09 04:37:12,029 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=126, Unknown=1, NotChecked=22, Total=182 [2024-11-09 04:37:12,029 INFO L432 NwaCegarLoop]: 172 mSDtfsCounter, 0 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:12,030 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 557 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 539 Invalid, 0 Unknown, 186 Unchecked, 1.3s Time] [2024-11-09 04:37:12,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-09 04:37:12,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2024-11-09 04:37:12,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 96 states have (on average 1.9270833333333333) internal successors, (185), 169 states have internal predecessors, (185), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 04:37:12,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 193 transitions. [2024-11-09 04:37:12,036 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 193 transitions. Word has length 27 [2024-11-09 04:37:12,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:12,037 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 193 transitions. [2024-11-09 04:37:12,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:37:12,037 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 193 transitions. [2024-11-09 04:37:12,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 04:37:12,038 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:12,038 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:12,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2024-11-09 04:37:12,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2024-11-09 04:37:12,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 04:37:12,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:12,642 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:37:12,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:12,644 INFO L85 PathProgramCache]: Analyzing trace with hash 195863530, now seen corresponding path program 1 times [2024-11-09 04:37:12,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:37:12,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844081306] [2024-11-09 04:37:12,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:12,645 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:37:12,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:37:12,648 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:37:12,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-11-09 04:37:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:12,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:37:12,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:37:12,880 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:12,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:37:12,929 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:37:12,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844081306] [2024-11-09 04:37:12,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844081306] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:37:12,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1039517487] [2024-11-09 04:37:12,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:12,930 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 04:37:12,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 04:37:12,933 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 04:37:12,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2024-11-09 04:37:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:13,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:37:13,127 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:37:13,162 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:13,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:37:13,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1039517487] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:37:13,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106671452] [2024-11-09 04:37:13,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:13,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:13,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:37:13,212 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:37:13,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 04:37:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:13,348 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:37:13,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:13,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:37:13,390 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:37:13,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106671452] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:37:13,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 04:37:13,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 6 [2024-11-09 04:37:13,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118989756] [2024-11-09 04:37:13,438 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 04:37:13,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:37:13,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:37:13,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:37:13,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:37:13,439 INFO L87 Difference]: Start difference. First operand 175 states and 193 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:37:13,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:13,599 INFO L93 Difference]: Finished difference Result 175 states and 192 transitions. [2024-11-09 04:37:13,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:37:13,600 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2024-11-09 04:37:13,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:13,601 INFO L225 Difference]: With dead ends: 175 [2024-11-09 04:37:13,601 INFO L226 Difference]: Without dead ends: 175 [2024-11-09 04:37:13,601 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:37:13,602 INFO L432 NwaCegarLoop]: 175 mSDtfsCounter, 1 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:13,602 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 859 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:37:13,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-09 04:37:13,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2024-11-09 04:37:13,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 96 states have (on average 1.9166666666666667) internal successors, (184), 169 states have internal predecessors, (184), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 04:37:13,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 192 transitions. [2024-11-09 04:37:13,608 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 192 transitions. Word has length 29 [2024-11-09 04:37:13,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:13,609 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 192 transitions. [2024-11-09 04:37:13,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:37:13,609 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 192 transitions. [2024-11-09 04:37:13,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-09 04:37:13,610 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:13,610 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:13,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2024-11-09 04:37:13,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 04:37:14,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2024-11-09 04:37:14,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:37:14,211 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:37:14,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:14,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1772003801, now seen corresponding path program 1 times [2024-11-09 04:37:14,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:37:14,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629147154] [2024-11-09 04:37:14,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:14,212 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:37:14,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:37:14,214 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:37:14,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-11-09 04:37:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:14,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:37:14,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 04:37:14,410 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:14,429 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-11-09 04:37:14,429 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 16 treesize of output 15 [2024-11-09 04:37:14,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 04:37:14,455 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:37:14,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629147154] [2024-11-09 04:37:14,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629147154] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:37:14,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1278737767] [2024-11-09 04:37:14,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:14,456 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 04:37:14,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 04:37:14,457 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 04:37:14,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2024-11-09 04:37:14,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:14,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 04:37:14,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 04:37:14,737 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:14,755 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-11-09 04:37:14,755 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 16 treesize of output 15 [2024-11-09 04:37:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 04:37:14,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1278737767] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:37:14,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740583611] [2024-11-09 04:37:14,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:14,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:14,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:37:14,788 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:37:14,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 04:37:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:14,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:37:14,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 04:37:14,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:14,983 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-11-09 04:37:14,984 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 16 treesize of output 15 [2024-11-09 04:37:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 04:37:15,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740583611] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:37:15,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 04:37:15,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2024-11-09 04:37:15,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158007572] [2024-11-09 04:37:15,009 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 04:37:15,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:37:15,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:37:15,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:37:15,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:37:15,011 INFO L87 Difference]: Start difference. First operand 175 states and 192 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:37:15,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:15,326 INFO L93 Difference]: Finished difference Result 180 states and 201 transitions. [2024-11-09 04:37:15,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:37:15,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2024-11-09 04:37:15,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:15,329 INFO L225 Difference]: With dead ends: 180 [2024-11-09 04:37:15,329 INFO L226 Difference]: Without dead ends: 180 [2024-11-09 04:37:15,329 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:37:15,330 INFO L432 NwaCegarLoop]: 181 mSDtfsCounter, 6 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:15,330 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 447 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:37:15,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-11-09 04:37:15,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2024-11-09 04:37:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 100 states have (on average 1.91) internal successors, (191), 173 states have internal predecessors, (191), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 04:37:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 199 transitions. [2024-11-09 04:37:15,336 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 199 transitions. Word has length 30 [2024-11-09 04:37:15,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:15,336 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 199 transitions. [2024-11-09 04:37:15,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:37:15,337 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 199 transitions. [2024-11-09 04:37:15,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-09 04:37:15,337 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:15,338 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:15,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2024-11-09 04:37:15,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-09 04:37:15,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2024-11-09 04:37:15,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:37:15,939 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:37:15,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:15,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1772003802, now seen corresponding path program 1 times [2024-11-09 04:37:15,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:37:15,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629895242] [2024-11-09 04:37:15,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:15,940 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:37:15,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:37:15,941 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:37:15,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2024-11-09 04:37:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:16,080 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 04:37:16,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:16,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:37:16,247 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:16,320 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:37:16,321 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 22 treesize of output 26 [2024-11-09 04:37:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:37:16,672 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:37:16,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629895242] [2024-11-09 04:37:16,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629895242] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:37:16,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1449838629] [2024-11-09 04:37:16,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:16,672 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 04:37:16,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 04:37:16,673 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 04:37:16,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2024-11-09 04:37:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:16,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 04:37:16,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:37:17,020 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:17,066 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:37:17,067 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 22 treesize of output 26 [2024-11-09 04:37:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:37:17,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1449838629] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:37:17,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517576934] [2024-11-09 04:37:17,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:17,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:17,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:37:17,324 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:37:17,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 04:37:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:17,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 04:37:17,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:17,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:37:17,566 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:17,609 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:37:17,609 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 22 treesize of output 26 [2024-11-09 04:37:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:37:17,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517576934] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:37:17,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 04:37:17,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2024-11-09 04:37:17,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715598556] [2024-11-09 04:37:17,799 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 04:37:17,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 04:37:17,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:37:17,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 04:37:17,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-09 04:37:17,800 INFO L87 Difference]: Start difference. First operand 179 states and 199 transitions. Second operand has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 04:37:18,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:18,793 INFO L93 Difference]: Finished difference Result 183 states and 203 transitions. [2024-11-09 04:37:18,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 04:37:18,794 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2024-11-09 04:37:18,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:18,795 INFO L225 Difference]: With dead ends: 183 [2024-11-09 04:37:18,795 INFO L226 Difference]: Without dead ends: 183 [2024-11-09 04:37:18,795 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-09 04:37:18,796 INFO L432 NwaCegarLoop]: 176 mSDtfsCounter, 8 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:18,796 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1243 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 04:37:18,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-09 04:37:18,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2024-11-09 04:37:18,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 100 states have (on average 1.9) internal successors, (190), 173 states have internal predecessors, (190), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 04:37:18,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 198 transitions. [2024-11-09 04:37:18,802 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 198 transitions. Word has length 30 [2024-11-09 04:37:18,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:18,802 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 198 transitions. [2024-11-09 04:37:18,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 04:37:18,803 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 198 transitions. [2024-11-09 04:37:18,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-09 04:37:18,804 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:18,804 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:18,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2024-11-09 04:37:19,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2024-11-09 04:37:19,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-09 04:37:19,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:19,405 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:37:19,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:19,405 INFO L85 PathProgramCache]: Analyzing trace with hash -902457012, now seen corresponding path program 1 times [2024-11-09 04:37:19,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:37:19,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2038869977] [2024-11-09 04:37:19,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:19,406 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:37:19,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:37:19,409 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:37:19,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2024-11-09 04:37:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:19,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 04:37:19,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:19,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-09 04:37:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:37:19,630 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:37:19,630 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:37:19,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2038869977] [2024-11-09 04:37:19,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2038869977] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:37:19,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:37:19,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 04:37:19,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586089875] [2024-11-09 04:37:19,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:37:19,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 04:37:19,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:37:19,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 04:37:19,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:37:19,632 INFO L87 Difference]: Start difference. First operand 179 states and 198 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:37:20,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:20,496 INFO L93 Difference]: Finished difference Result 178 states and 197 transitions. [2024-11-09 04:37:20,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:37:20,496 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2024-11-09 04:37:20,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:20,498 INFO L225 Difference]: With dead ends: 178 [2024-11-09 04:37:20,498 INFO L226 Difference]: Without dead ends: 178 [2024-11-09 04:37:20,498 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:37:20,498 INFO L432 NwaCegarLoop]: 172 mSDtfsCounter, 9 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:20,499 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 646 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 04:37:20,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-09 04:37:20,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2024-11-09 04:37:20,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 100 states have (on average 1.89) internal successors, (189), 172 states have internal predecessors, (189), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 04:37:20,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 197 transitions. [2024-11-09 04:37:20,504 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 197 transitions. Word has length 31 [2024-11-09 04:37:20,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:20,505 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 197 transitions. [2024-11-09 04:37:20,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:37:20,505 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 197 transitions. [2024-11-09 04:37:20,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-09 04:37:20,505 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:20,506 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:20,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2024-11-09 04:37:20,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:37:20,706 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:37:20,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:20,707 INFO L85 PathProgramCache]: Analyzing trace with hash -902457011, now seen corresponding path program 1 times [2024-11-09 04:37:20,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:37:20,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822049010] [2024-11-09 04:37:20,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:20,707 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:37:20,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:37:20,709 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:37:20,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2024-11-09 04:37:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:20,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 04:37:20,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:20,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:37:21,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:37:21,016 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:37:21,016 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:37:21,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822049010] [2024-11-09 04:37:21,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822049010] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:37:21,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:37:21,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 04:37:21,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212634725] [2024-11-09 04:37:21,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:37:21,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 04:37:21,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:37:21,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 04:37:21,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:37:21,018 INFO L87 Difference]: Start difference. First operand 178 states and 197 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:37:22,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:22,017 INFO L93 Difference]: Finished difference Result 177 states and 196 transitions. [2024-11-09 04:37:22,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:37:22,018 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2024-11-09 04:37:22,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:22,019 INFO L225 Difference]: With dead ends: 177 [2024-11-09 04:37:22,019 INFO L226 Difference]: Without dead ends: 177 [2024-11-09 04:37:22,019 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:37:22,019 INFO L432 NwaCegarLoop]: 172 mSDtfsCounter, 9 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:22,020 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 676 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 04:37:22,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-11-09 04:37:22,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2024-11-09 04:37:22,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 100 states have (on average 1.88) internal successors, (188), 171 states have internal predecessors, (188), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 04:37:22,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 196 transitions. [2024-11-09 04:37:22,025 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 196 transitions. Word has length 31 [2024-11-09 04:37:22,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:22,027 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 196 transitions. [2024-11-09 04:37:22,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:37:22,027 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 196 transitions. [2024-11-09 04:37:22,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 04:37:22,028 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:22,028 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:22,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2024-11-09 04:37:22,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:37:22,229 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:37:22,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:22,229 INFO L85 PathProgramCache]: Analyzing trace with hash -781999118, now seen corresponding path program 1 times [2024-11-09 04:37:22,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:37:22,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6519719] [2024-11-09 04:37:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:22,230 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:37:22,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:37:22,231 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:37:22,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2024-11-09 04:37:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:22,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:37:22,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 04:37:22,442 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:22,507 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 04:37:22,507 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:37:22,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6519719] [2024-11-09 04:37:22,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6519719] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:37:22,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [346092327] [2024-11-09 04:37:22,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:22,508 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 04:37:22,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 04:37:22,511 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 04:37:22,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2024-11-09 04:37:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:22,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:37:22,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:22,888 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 04:37:22,889 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 04:37:22,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [346092327] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:37:22,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694270101] [2024-11-09 04:37:22,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:22,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:22,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:37:22,933 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:37:22,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-09 04:37:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:23,148 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:37:23,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 04:37:23,176 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 04:37:23,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694270101] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:37:23,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 04:37:23,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2024-11-09 04:37:23,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086745883] [2024-11-09 04:37:23,221 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 04:37:23,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:37:23,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:37:23,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:37:23,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:37:23,222 INFO L87 Difference]: Start difference. First operand 177 states and 196 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 04:37:23,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:23,255 INFO L93 Difference]: Finished difference Result 163 states and 176 transitions. [2024-11-09 04:37:23,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:37:23,256 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2024-11-09 04:37:23,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:23,257 INFO L225 Difference]: With dead ends: 163 [2024-11-09 04:37:23,257 INFO L226 Difference]: Without dead ends: 163 [2024-11-09 04:37:23,258 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:37:23,258 INFO L432 NwaCegarLoop]: 172 mSDtfsCounter, 0 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:23,259 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 671 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:37:23,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-09 04:37:23,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2024-11-09 04:37:23,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 91 states have (on average 1.8681318681318682) internal successors, (170), 158 states have internal predecessors, (170), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:37:23,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 176 transitions. [2024-11-09 04:37:23,263 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 176 transitions. Word has length 43 [2024-11-09 04:37:23,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:23,263 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 176 transitions. [2024-11-09 04:37:23,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 04:37:23,264 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 176 transitions. [2024-11-09 04:37:23,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 04:37:23,268 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:23,268 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:23,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2024-11-09 04:37:23,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2024-11-09 04:37:23,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-09 04:37:23,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:23,870 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:37:23,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:23,870 INFO L85 PathProgramCache]: Analyzing trace with hash -959800765, now seen corresponding path program 1 times [2024-11-09 04:37:23,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:37:23,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167610004] [2024-11-09 04:37:23,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:23,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:37:23,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:37:23,872 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:37:23,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2024-11-09 04:37:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:24,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 04:37:24,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:24,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-09 04:37:24,226 INFO L378 Elim1Store]: Elim1 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 7 treesize of output 5 [2024-11-09 04:37:24,252 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= (_ bv0 1) (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) (not (= (_ bv0 32) (bvadd |c_#StackHeapBarrier| (_ bv1 32))))) is different from true [2024-11-09 04:37:24,340 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-09 04:37:24,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-09 04:37:24,366 INFO L378 Elim1Store]: Elim1 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 7 treesize of output 5 [2024-11-09 04:37:24,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:37:24,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2024-11-09 04:37:24,681 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (= (store |c_old(#valid)| |node_create_~temp~0#1.base| (_ bv1 1)) |c_#valid|)) is different from true [2024-11-09 04:37:24,714 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-09 04:37:24,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-11-09 04:37:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 21 not checked. [2024-11-09 04:37:24,749 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:25,034 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:37:25,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167610004] [2024-11-09 04:37:25,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167610004] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:37:25,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1205725185] [2024-11-09 04:37:25,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:25,035 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 04:37:25,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 04:37:25,036 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 04:37:25,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2024-11-09 04:37:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:25,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 04:37:25,507 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:25,544 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-09 04:37:25,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-11-09 04:37:25,595 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2024-11-09 04:37:25,596 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 15 treesize of output 11 [2024-11-09 04:37:25,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:37:25,706 INFO L349 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2024-11-09 04:37:25,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2024-11-09 04:37:25,828 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2024-11-09 04:37:25,829 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 24 treesize of output 20 [2024-11-09 04:37:26,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:37:26,049 INFO L349 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2024-11-09 04:37:26,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 38 [2024-11-09 04:37:26,427 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2024-11-09 04:37:26,427 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 24 treesize of output 20 [2024-11-09 04:37:26,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:37:26,555 INFO L349 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2024-11-09 04:37:26,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 38 [2024-11-09 04:37:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 04:37:26,692 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:26,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1205725185] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:37:26,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117156389] [2024-11-09 04:37:26,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:26,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:26,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:37:26,810 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:37:26,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-09 04:37:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:27,025 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 04:37:27,028 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:27,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-09 04:37:27,042 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= (_ bv0 1) (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-09 04:37:27,101 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-09 04:37:27,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-09 04:37:27,253 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-09 04:37:27,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-11-09 04:37:27,422 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-09 04:37:27,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-11-09 04:37:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 19 not checked. [2024-11-09 04:37:27,455 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 04:37:32,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117156389] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:37:32,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2024-11-09 04:37:32,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 11, 6] total 30 [2024-11-09 04:37:32,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524689057] [2024-11-09 04:37:32,088 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2024-11-09 04:37:32,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 04:37:32,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:37:32,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 04:37:32,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=754, Unknown=5, NotChecked=174, Total=1056 [2024-11-09 04:37:32,090 INFO L87 Difference]: Start difference. First operand 163 states and 176 transitions. Second operand has 31 states, 28 states have (on average 3.892857142857143) internal successors, (109), 25 states have internal predecessors, (109), 7 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-09 04:37:36,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:36,621 INFO L93 Difference]: Finished difference Result 173 states and 188 transitions. [2024-11-09 04:37:36,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 04:37:36,622 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 3.892857142857143) internal successors, (109), 25 states have internal predecessors, (109), 7 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) Word has length 44 [2024-11-09 04:37:36,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:36,623 INFO L225 Difference]: With dead ends: 173 [2024-11-09 04:37:36,623 INFO L226 Difference]: Without dead ends: 173 [2024-11-09 04:37:36,623 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 151 SyntacticMatches, 15 SemanticMatches, 39 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=211, Invalid=1202, Unknown=5, NotChecked=222, Total=1640 [2024-11-09 04:37:36,624 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 535 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 540 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:36,624 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 813 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1005 Invalid, 0 Unknown, 540 Unchecked, 4.1s Time] [2024-11-09 04:37:36,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-09 04:37:36,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 152. [2024-11-09 04:37:36,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 91 states have (on average 1.7472527472527473) internal successors, (159), 147 states have internal predecessors, (159), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:37:36,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 165 transitions. [2024-11-09 04:37:36,630 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 165 transitions. Word has length 44 [2024-11-09 04:37:36,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:36,630 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 165 transitions. [2024-11-09 04:37:36,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 3.892857142857143) internal successors, (109), 25 states have internal predecessors, (109), 7 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-09 04:37:36,631 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 165 transitions. [2024-11-09 04:37:36,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 04:37:36,631 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:36,631 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:36,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2024-11-09 04:37:36,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2024-11-09 04:37:37,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-09 04:37:37,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:37,233 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:37:37,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:37,233 INFO L85 PathProgramCache]: Analyzing trace with hash -959800764, now seen corresponding path program 1 times [2024-11-09 04:37:37,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:37:37,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746947298] [2024-11-09 04:37:37,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:37,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:37:37,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:37:37,235 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:37:37,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2024-11-09 04:37:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:37,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 04:37:37,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:37,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:37:37,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-09 04:37:37,653 INFO L378 Elim1Store]: Elim1 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 5 treesize of output 3 [2024-11-09 04:37:37,662 INFO L378 Elim1Store]: Elim1 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 7 treesize of output 5 [2024-11-09 04:37:37,703 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) (not (= (_ bv0 32) (bvadd |c_#StackHeapBarrier| (_ bv1 32))))) is different from true [2024-11-09 04:37:37,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:37:37,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 04:37:37,809 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-09 04:37:37,809 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 13 treesize of output 13 [2024-11-09 04:37:37,873 INFO L378 Elim1Store]: Elim1 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 5 treesize of output 3 [2024-11-09 04:37:38,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:37:38,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 04:37:38,354 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv12 32)) |c_#length|)) is different from true [2024-11-09 04:37:38,393 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2024-11-09 04:37:38,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2024-11-09 04:37:38,484 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 21 not checked. [2024-11-09 04:37:38,485 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:38,677 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:37:38,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746947298] [2024-11-09 04:37:38,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746947298] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:37:38,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [106948787] [2024-11-09 04:37:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:38,678 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 04:37:38,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 04:37:38,679 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 04:37:38,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2024-11-09 04:37:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:39,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 04:37:39,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:39,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:37:39,226 INFO L378 Elim1Store]: Elim1 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 5 treesize of output 3 [2024-11-09 04:37:39,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:37:39,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 04:37:39,470 INFO L378 Elim1Store]: Elim1 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 5 treesize of output 3 [2024-11-09 04:37:39,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:37:39,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 04:37:40,064 INFO L378 Elim1Store]: Elim1 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 5 treesize of output 3 [2024-11-09 04:37:40,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:37:40,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 04:37:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 04:37:40,235 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:40,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [106948787] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:37:40,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397263411] [2024-11-09 04:37:40,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:40,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:40,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:37:40,427 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:37:40,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-09 04:37:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:40,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 04:37:40,686 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:40,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-09 04:37:40,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:37:41,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:37:41,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 04:37:41,127 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-09 04:37:41,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2024-11-09 04:37:41,285 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-09 04:37:41,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:37:41,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 04:37:41,370 INFO L349 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2024-11-09 04:37:41,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2024-11-09 04:37:41,565 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2024-11-09 04:37:41,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2024-11-09 04:37:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 21 not checked. [2024-11-09 04:37:41,658 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:41,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397263411] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:37:41,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:37:41,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2024-11-09 04:37:41,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895540462] [2024-11-09 04:37:41,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:37:41,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 04:37:41,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:37:41,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 04:37:41,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=715, Unknown=3, NotChecked=168, Total=992 [2024-11-09 04:37:41,799 INFO L87 Difference]: Start difference. First operand 152 states and 165 transitions. Second operand has 29 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 23 states have internal predecessors, (92), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-09 04:37:44,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:37:47,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:37:49,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:37:52,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:37:54,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:37:57,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:38:01,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:38:03,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:38:05,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:38:09,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:38:11,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:38:13,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:38:15,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:38:18,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:38:20,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:38:22,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:38:26,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.56s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:38:28,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:38:30,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:38:33,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:38:36,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:38:38,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:38:40,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:38:42,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:38:45,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:38:47,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:38:49,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:38:49,062 INFO L93 Difference]: Finished difference Result 143 states and 156 transitions. [2024-11-09 04:38:49,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 04:38:49,063 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 23 states have internal predecessors, (92), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 44 [2024-11-09 04:38:49,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:38:49,064 INFO L225 Difference]: With dead ends: 143 [2024-11-09 04:38:49,064 INFO L226 Difference]: Without dead ends: 143 [2024-11-09 04:38:49,065 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=191, Invalid=1149, Unknown=4, NotChecked=216, Total=1560 [2024-11-09 04:38:49,065 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 577 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 23 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 444 IncrementalHoareTripleChecker+Unchecked, 64.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:38:49,065 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 829 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1062 Invalid, 25 Unknown, 444 Unchecked, 64.1s Time] [2024-11-09 04:38:49,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-09 04:38:49,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2024-11-09 04:38:49,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 91 states have (on average 1.6263736263736264) internal successors, (148), 136 states have internal predecessors, (148), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:38:49,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 154 transitions. [2024-11-09 04:38:49,070 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 154 transitions. Word has length 44 [2024-11-09 04:38:49,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:38:49,070 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 154 transitions. [2024-11-09 04:38:49,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 23 states have internal predecessors, (92), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-09 04:38:49,070 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 154 transitions. [2024-11-09 04:38:49,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-09 04:38:49,071 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:38:49,071 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:38:49,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2024-11-09 04:38:49,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-09 04:38:49,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2024-11-09 04:38:49,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:38:49,672 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:38:49,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:38:49,673 INFO L85 PathProgramCache]: Analyzing trace with hash -811248408, now seen corresponding path program 1 times [2024-11-09 04:38:49,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:38:49,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544639948] [2024-11-09 04:38:49,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:38:49,673 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:38:49,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:38:49,674 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:38:49,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2024-11-09 04:38:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:38:50,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 04:38:50,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:38:50,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-09 04:38:51,995 INFO L378 Elim1Store]: Elim1 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 [2024-11-09 04:38:53,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:38:53,331 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-09 04:38:53,480 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2024-11-09 04:38:53,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 28 [2024-11-09 04:38:53,829 INFO L378 Elim1Store]: Elim1 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 27 treesize of output 15 [2024-11-09 04:38:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:38:54,471 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:38:55,702 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:38:55,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544639948] [2024-11-09 04:38:55,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544639948] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:38:55,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [485722275] [2024-11-09 04:38:55,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:38:55,702 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 04:38:55,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 04:38:55,703 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 04:38:55,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2024-11-09 04:38:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:38:56,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 04:38:56,243 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:38:56,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-09 04:38:58,800 INFO L378 Elim1Store]: Elim1 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 [2024-11-09 04:38:59,841 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2024-11-09 04:38:59,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 28 [2024-11-09 04:38:59,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:38:59,882 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2024-11-09 04:39:00,347 INFO L378 Elim1Store]: Elim1 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 27 treesize of output 15 [2024-11-09 04:39:00,438 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:39:00,438 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:39:01,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [485722275] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:39:01,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703719956] [2024-11-09 04:39:01,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:39:01,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:39:01,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:39:01,105 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:39:01,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-09 04:39:01,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:39:01,358 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 04:39:01,361 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:39:01,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-09 04:39:03,593 INFO L378 Elim1Store]: Elim1 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 [2024-11-09 04:39:04,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:39:04,158 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-09 04:39:04,301 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2024-11-09 04:39:04,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 28 [2024-11-09 04:39:04,443 INFO L378 Elim1Store]: Elim1 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 27 treesize of output 15 [2024-11-09 04:39:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:39:04,531 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:39:05,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703719956] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:39:05,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:39:05,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 37 [2024-11-09 04:39:05,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090970538] [2024-11-09 04:39:05,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:39:05,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-09 04:39:05,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:39:05,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-09 04:39:05,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1378, Unknown=1, NotChecked=0, Total=1560 [2024-11-09 04:39:05,131 INFO L87 Difference]: Start difference. First operand 141 states and 154 transitions. Second operand has 38 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 states have internal predecessors, (93), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-09 04:39:25,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:39:25,395 INFO L93 Difference]: Finished difference Result 187 states and 206 transitions. [2024-11-09 04:39:25,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 04:39:25,395 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 states have internal predecessors, (93), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) Word has length 48 [2024-11-09 04:39:25,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:39:25,396 INFO L225 Difference]: With dead ends: 187 [2024-11-09 04:39:25,396 INFO L226 Difference]: Without dead ends: 187 [2024-11-09 04:39:25,397 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=348, Invalid=2406, Unknown=2, NotChecked=0, Total=2756 [2024-11-09 04:39:25,397 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 549 mSDsluCounter, 1320 mSDsCounter, 0 mSdLazyCounter, 1584 mSolverCounterSat, 27 mSolverCounterUnsat, 34 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1584 IncrementalHoareTripleChecker+Invalid, 34 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:39:25,397 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 1416 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1584 Invalid, 34 Unknown, 0 Unchecked, 16.0s Time] [2024-11-09 04:39:25,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-11-09 04:39:25,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 149. [2024-11-09 04:39:25,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 99 states have (on average 1.6868686868686869) internal successors, (167), 144 states have internal predecessors, (167), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:39:25,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 173 transitions. [2024-11-09 04:39:25,401 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 173 transitions. Word has length 48 [2024-11-09 04:39:25,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:39:25,402 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 173 transitions. [2024-11-09 04:39:25,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 states have internal predecessors, (93), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-09 04:39:25,402 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 173 transitions. [2024-11-09 04:39:25,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-09 04:39:25,403 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:39:25,403 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:39:25,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2024-11-09 04:39:25,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2024-11-09 04:39:25,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-09 04:39:26,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:39:26,004 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:39:26,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:39:26,005 INFO L85 PathProgramCache]: Analyzing trace with hash -811248407, now seen corresponding path program 1 times [2024-11-09 04:39:26,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:39:26,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924860073] [2024-11-09 04:39:26,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:39:26,005 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:39:26,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:39:26,006 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:39:26,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2024-11-09 04:39:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:39:26,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-09 04:39:26,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:39:27,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-09 04:39:27,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:39:29,110 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 04:39:29,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-11-09 04:39:29,709 INFO L378 Elim1Store]: Elim1 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 7 treesize of output 3 [2024-11-09 04:39:37,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:39:37,443 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 22 [2024-11-09 04:39:37,552 INFO L349 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2024-11-09 04:39:37,553 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 17 treesize of output 17 [2024-11-09 04:39:37,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:39:37,597 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 04:39:37,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-09 04:39:38,055 INFO L378 Elim1Store]: Elim1 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 25 treesize of output 13 [2024-11-09 04:39:38,078 INFO L378 Elim1Store]: Elim1 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 7 treesize of output 3 [2024-11-09 04:39:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:39:38,853 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:39:40,871 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:39:40,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924860073] [2024-11-09 04:39:40,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924860073] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:39:40,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1965905074] [2024-11-09 04:39:40,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:39:40,872 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 04:39:40,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 04:39:40,873 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 04:39:40,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2024-11-09 04:39:41,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:39:41,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-09 04:39:41,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:39:42,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-09 04:39:42,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:39:45,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-11-09 04:39:45,961 INFO L378 Elim1Store]: Elim1 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 7 treesize of output 3 [2024-11-09 04:39:47,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:39:47,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-09 04:39:47,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:39:47,224 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 22 [2024-11-09 04:39:47,314 INFO L349 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2024-11-09 04:39:47,315 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 17 treesize of output 17 [2024-11-09 04:39:47,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:39:47,350 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 04:39:48,090 INFO L378 Elim1Store]: Elim1 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 25 treesize of output 13 [2024-11-09 04:39:48,110 INFO L378 Elim1Store]: Elim1 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 7 treesize of output 3 [2024-11-09 04:39:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:39:48,419 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:39:49,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1965905074] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:39:49,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748954145] [2024-11-09 04:39:49,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:39:49,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:39:49,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:39:49,742 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:39:49,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-09 04:39:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:39:50,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-09 04:39:50,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:39:50,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-09 04:39:50,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:39:53,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-11-09 04:39:53,886 INFO L378 Elim1Store]: Elim1 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 7 treesize of output 3 [2024-11-09 04:39:54,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:39:54,695 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 22 [2024-11-09 04:39:54,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:39:54,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-09 04:39:54,823 INFO L349 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2024-11-09 04:39:54,823 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 17 treesize of output 17 [2024-11-09 04:39:54,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:39:54,853 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 04:39:55,034 INFO L378 Elim1Store]: Elim1 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 25 treesize of output 13 [2024-11-09 04:39:55,051 INFO L378 Elim1Store]: Elim1 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 7 treesize of output 3 [2024-11-09 04:39:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:39:55,310 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:39:56,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748954145] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:39:56,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:39:56,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 38 [2024-11-09 04:39:56,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307157805] [2024-11-09 04:39:56,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:39:56,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-09 04:39:56,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:39:56,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-09 04:39:56,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1605, Unknown=3, NotChecked=0, Total=1806 [2024-11-09 04:39:56,438 INFO L87 Difference]: Start difference. First operand 149 states and 173 transitions. Second operand has 39 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 32 states have internal predecessors, (88), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-09 04:40:08,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:40:12,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:40:14,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:40:23,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:40:26,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:40:30,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:40:33,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:40:39,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:40:42,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:40:44,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:40:46,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:40:49,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:40:51,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:40:55,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:40:58,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:41:01,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:41:02,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:41:06,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:41:10,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:41:13,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:41:17,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:41:19,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:41:22,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:41:25,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:41:28,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:41:32,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:41:32,667 INFO L93 Difference]: Finished difference Result 185 states and 202 transitions. [2024-11-09 04:41:32,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 04:41:32,668 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 32 states have internal predecessors, (88), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) Word has length 48 [2024-11-09 04:41:32,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:41:32,669 INFO L225 Difference]: With dead ends: 185 [2024-11-09 04:41:32,669 INFO L226 Difference]: Without dead ends: 185 [2024-11-09 04:41:32,670 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 36.3s TimeCoverageRelationStatistics Valid=363, Invalid=2820, Unknown=9, NotChecked=0, Total=3192 [2024-11-09 04:41:32,671 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 610 mSDsluCounter, 1543 mSDsCounter, 0 mSdLazyCounter, 2420 mSolverCounterSat, 7 mSolverCounterUnsat, 68 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 1640 SdHoareTripleChecker+Invalid, 2495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2420 IncrementalHoareTripleChecker+Invalid, 68 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:41:32,671 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 1640 Invalid, 2495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2420 Invalid, 68 Unknown, 0 Unchecked, 76.5s Time] [2024-11-09 04:41:32,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-09 04:41:32,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 149. [2024-11-09 04:41:32,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 99 states have (on average 1.6666666666666667) internal successors, (165), 144 states have internal predecessors, (165), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:41:32,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 171 transitions. [2024-11-09 04:41:32,676 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 171 transitions. Word has length 48 [2024-11-09 04:41:32,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:41:32,676 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 171 transitions. [2024-11-09 04:41:32,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 32 states have internal predecessors, (88), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-09 04:41:32,677 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 171 transitions. [2024-11-09 04:41:32,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-09 04:41:32,677 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:41:32,678 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:41:32,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2024-11-09 04:41:32,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-09 04:41:33,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2024-11-09 04:41:33,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt [2024-11-09 04:41:33,279 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:41:33,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:41:33,279 INFO L85 PathProgramCache]: Analyzing trace with hash -811237517, now seen corresponding path program 1 times [2024-11-09 04:41:33,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:41:33,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887548825] [2024-11-09 04:41:33,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:41:33,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:41:33,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:41:33,281 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:41:33,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2024-11-09 04:41:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:41:33,561 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:41:33,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:41:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 04:41:33,864 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:41:33,864 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:41:33,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887548825] [2024-11-09 04:41:33,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887548825] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:41:33,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:41:33,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 04:41:33,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155701443] [2024-11-09 04:41:33,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:41:33,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:41:33,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:41:33,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:41:33,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:41:33,865 INFO L87 Difference]: Start difference. First operand 149 states and 171 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:41:34,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:41:34,013 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2024-11-09 04:41:34,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:41:34,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2024-11-09 04:41:34,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:41:34,014 INFO L225 Difference]: With dead ends: 149 [2024-11-09 04:41:34,014 INFO L226 Difference]: Without dead ends: 149 [2024-11-09 04:41:34,015 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:41:34,015 INFO L432 NwaCegarLoop]: 148 mSDtfsCounter, 102 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:41:34,016 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 333 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:41:34,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-11-09 04:41:34,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 144. [2024-11-09 04:41:34,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 94 states have (on average 1.6063829787234043) internal successors, (151), 139 states have internal predecessors, (151), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:41:34,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 157 transitions. [2024-11-09 04:41:34,020 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 157 transitions. Word has length 48 [2024-11-09 04:41:34,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:41:34,021 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 157 transitions. [2024-11-09 04:41:34,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:41:34,021 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 157 transitions. [2024-11-09 04:41:34,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-09 04:41:34,021 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:41:34,022 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:41:34,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2024-11-09 04:41:34,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:41:34,222 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:41:34,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:41:34,223 INFO L85 PathProgramCache]: Analyzing trace with hash 565059040, now seen corresponding path program 1 times [2024-11-09 04:41:34,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:41:34,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150800082] [2024-11-09 04:41:34,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:41:34,223 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:41:34,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:41:34,227 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:41:34,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2024-11-09 04:41:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:41:34,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 04:41:34,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:41:35,014 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 04:41:35,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:41:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 04:41:35,701 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:41:35,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150800082] [2024-11-09 04:41:35,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150800082] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:41:35,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [719609156] [2024-11-09 04:41:35,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:41:35,701 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 04:41:35,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 04:41:35,702 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 04:41:35,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2024-11-09 04:41:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:41:36,256 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 04:41:36,257 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:41:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 04:41:36,607 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:41:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 04:41:37,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [719609156] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:41:37,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77843317] [2024-11-09 04:41:37,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:41:37,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:41:37,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:41:37,079 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:41:37,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-09 04:41:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:41:37,370 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 04:41:37,372 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:41:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 04:41:37,910 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:41:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 04:41:38,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77843317] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:41:38,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 04:41:38,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 10 [2024-11-09 04:41:38,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707719768] [2024-11-09 04:41:38,534 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 04:41:38,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 04:41:38,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:41:38,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 04:41:38,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-09 04:41:38,535 INFO L87 Difference]: Start difference. First operand 144 states and 157 transitions. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 6 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-09 04:41:39,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:41:39,049 INFO L93 Difference]: Finished difference Result 144 states and 154 transitions. [2024-11-09 04:41:39,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:41:39,050 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 6 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 52 [2024-11-09 04:41:39,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:41:39,051 INFO L225 Difference]: With dead ends: 144 [2024-11-09 04:41:39,051 INFO L226 Difference]: Without dead ends: 144 [2024-11-09 04:41:39,052 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-09 04:41:39,052 INFO L432 NwaCegarLoop]: 141 mSDtfsCounter, 190 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:41:39,052 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 864 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:41:39,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-09 04:41:39,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2024-11-09 04:41:39,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 92 states have (on average 1.576086956521739) internal successors, (145), 135 states have internal predecessors, (145), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:41:39,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 151 transitions. [2024-11-09 04:41:39,057 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 151 transitions. Word has length 52 [2024-11-09 04:41:39,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:41:39,061 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 151 transitions. [2024-11-09 04:41:39,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 6 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-09 04:41:39,062 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 151 transitions. [2024-11-09 04:41:39,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-09 04:41:39,062 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:41:39,063 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:41:39,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2024-11-09 04:41:39,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-09 04:41:39,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2024-11-09 04:41:39,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt [2024-11-09 04:41:39,664 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:41:39,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:41:39,664 INFO L85 PathProgramCache]: Analyzing trace with hash 565069931, now seen corresponding path program 1 times [2024-11-09 04:41:39,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:41:39,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783727261] [2024-11-09 04:41:39,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:41:39,665 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:41:39,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:41:39,666 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:41:39,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2024-11-09 04:41:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:41:39,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:41:39,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:41:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 04:41:40,097 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:41:40,097 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:41:40,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783727261] [2024-11-09 04:41:40,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783727261] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:41:40,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:41:40,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:41:40,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273433273] [2024-11-09 04:41:40,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:41:40,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:41:40,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:41:40,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:41:40,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:41:40,099 INFO L87 Difference]: Start difference. First operand 140 states and 151 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 04:41:40,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:41:40,971 INFO L93 Difference]: Finished difference Result 139 states and 150 transitions. [2024-11-09 04:41:40,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:41:40,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2024-11-09 04:41:40,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:41:40,973 INFO L225 Difference]: With dead ends: 139 [2024-11-09 04:41:40,973 INFO L226 Difference]: Without dead ends: 139 [2024-11-09 04:41:40,973 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:41:40,974 INFO L432 NwaCegarLoop]: 143 mSDtfsCounter, 3 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 04:41:40,974 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 353 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 04:41:40,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-11-09 04:41:40,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2024-11-09 04:41:40,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 92 states have (on average 1.565217391304348) internal successors, (144), 134 states have internal predecessors, (144), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:41:40,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 150 transitions. [2024-11-09 04:41:40,980 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 150 transitions. Word has length 52 [2024-11-09 04:41:40,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:41:40,980 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 150 transitions. [2024-11-09 04:41:40,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 04:41:40,981 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 150 transitions. [2024-11-09 04:41:40,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-09 04:41:40,987 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:41:40,987 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:41:40,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2024-11-09 04:41:41,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:41:41,188 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:41:41,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:41:41,189 INFO L85 PathProgramCache]: Analyzing trace with hash 565069932, now seen corresponding path program 1 times [2024-11-09 04:41:41,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:41:41,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850690404] [2024-11-09 04:41:41,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:41:41,189 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:41:41,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:41:41,191 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:41:41,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2024-11-09 04:41:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:41:41,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:41:41,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:41:41,766 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 04:41:41,767 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:41:41,767 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:41:41,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850690404] [2024-11-09 04:41:41,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850690404] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:41:41,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:41:41,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:41:41,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101519691] [2024-11-09 04:41:41,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:41:41,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:41:41,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:41:41,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:41:41,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:41:41,769 INFO L87 Difference]: Start difference. First operand 139 states and 150 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 04:41:42,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:41:42,893 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2024-11-09 04:41:42,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:41:42,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2024-11-09 04:41:42,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:41:42,899 INFO L225 Difference]: With dead ends: 138 [2024-11-09 04:41:42,899 INFO L226 Difference]: Without dead ends: 138 [2024-11-09 04:41:42,899 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:41:42,900 INFO L432 NwaCegarLoop]: 143 mSDtfsCounter, 3 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:41:42,905 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 359 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 04:41:42,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-09 04:41:42,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2024-11-09 04:41:42,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 92 states have (on average 1.5543478260869565) internal successors, (143), 133 states have internal predecessors, (143), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:41:42,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 149 transitions. [2024-11-09 04:41:42,909 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 149 transitions. Word has length 52 [2024-11-09 04:41:42,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:41:42,913 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 149 transitions. [2024-11-09 04:41:42,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 04:41:42,914 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 149 transitions. [2024-11-09 04:41:42,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 04:41:42,914 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:41:42,915 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:41:42,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2024-11-09 04:41:43,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:41:43,115 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:41:43,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:41:43,125 INFO L85 PathProgramCache]: Analyzing trace with hash 337298716, now seen corresponding path program 1 times [2024-11-09 04:41:43,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:41:43,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418001215] [2024-11-09 04:41:43,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:41:43,126 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:41:43,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:41:43,129 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:41:43,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2024-11-09 04:41:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:41:43,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 04:41:43,469 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:41:43,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-09 04:41:43,896 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 04:41:43,896 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:41:43,896 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:41:43,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418001215] [2024-11-09 04:41:43,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418001215] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:41:43,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:41:43,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:41:43,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808947002] [2024-11-09 04:41:43,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:41:43,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:41:43,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:41:43,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:41:43,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:41:43,898 INFO L87 Difference]: Start difference. First operand 138 states and 149 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2024-11-09 04:41:46,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:41:46,127 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2024-11-09 04:41:46,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:41:46,127 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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 53 [2024-11-09 04:41:46,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:41:46,128 INFO L225 Difference]: With dead ends: 132 [2024-11-09 04:41:46,128 INFO L226 Difference]: Without dead ends: 132 [2024-11-09 04:41:46,128 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:41:46,129 INFO L432 NwaCegarLoop]: 110 mSDtfsCounter, 26 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:41:46,129 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 385 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-09 04:41:46,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-09 04:41:46,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2024-11-09 04:41:46,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 92 states have (on average 1.4891304347826086) internal successors, (137), 127 states have internal predecessors, (137), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:41:46,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 143 transitions. [2024-11-09 04:41:46,132 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 143 transitions. Word has length 53 [2024-11-09 04:41:46,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:41:46,132 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 143 transitions. [2024-11-09 04:41:46,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2024-11-09 04:41:46,132 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 143 transitions. [2024-11-09 04:41:46,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 04:41:46,133 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:41:46,133 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:41:46,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2024-11-09 04:41:46,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:41:46,333 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:41:46,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:41:46,334 INFO L85 PathProgramCache]: Analyzing trace with hash 337298717, now seen corresponding path program 1 times [2024-11-09 04:41:46,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:41:46,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93218087] [2024-11-09 04:41:46,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:41:46,335 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:41:46,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:41:46,338 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:41:46,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2024-11-09 04:41:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:41:46,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 04:41:46,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:41:46,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:41:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 04:41:47,395 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:41:47,395 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:41:47,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93218087] [2024-11-09 04:41:47,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93218087] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:41:47,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:41:47,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:41:47,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244164076] [2024-11-09 04:41:47,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:41:47,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:41:47,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:41:47,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:41:47,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:41:47,397 INFO L87 Difference]: Start difference. First operand 132 states and 143 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2024-11-09 04:41:49,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:41:49,339 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2024-11-09 04:41:49,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:41:49,341 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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 53 [2024-11-09 04:41:49,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:41:49,341 INFO L225 Difference]: With dead ends: 126 [2024-11-09 04:41:49,341 INFO L226 Difference]: Without dead ends: 126 [2024-11-09 04:41:49,342 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:41:49,342 INFO L432 NwaCegarLoop]: 110 mSDtfsCounter, 26 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-09 04:41:49,342 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 409 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-09 04:41:49,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-09 04:41:49,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2024-11-09 04:41:49,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 92 states have (on average 1.423913043478261) internal successors, (131), 121 states have internal predecessors, (131), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:41:49,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 137 transitions. [2024-11-09 04:41:49,346 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 137 transitions. Word has length 53 [2024-11-09 04:41:49,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:41:49,347 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 137 transitions. [2024-11-09 04:41:49,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2024-11-09 04:41:49,347 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 137 transitions. [2024-11-09 04:41:49,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-09 04:41:49,348 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:41:49,348 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:41:49,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2024-11-09 04:41:49,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:41:49,549 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2024-11-09 04:41:49,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:41:49,549 INFO L85 PathProgramCache]: Analyzing trace with hash 2021520223, now seen corresponding path program 1 times [2024-11-09 04:41:49,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:41:49,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1949900905] [2024-11-09 04:41:49,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:41:49,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:41:49,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:41:49,553 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:41:49,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2024-11-09 04:41:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:41:50,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-09 04:41:50,122 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:41:50,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:41:50,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2024-11-09 04:41:51,380 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-09 04:41:51,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2024-11-09 04:41:52,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 04:41:54,184 INFO L349 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2024-11-09 04:41:54,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2024-11-09 04:41:55,709 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 04:41:56,668 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 04:41:56,669 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 1 case distinctions, treesize of input 66 treesize of output 57 [2024-11-09 04:41:58,364 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-09 04:41:58,364 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 43 [2024-11-09 04:41:58,795 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 58 treesize of output 37 [2024-11-09 04:42:01,131 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-09 04:42:01,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 47 [2024-11-09 04:42:01,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2024-11-09 04:42:01,322 INFO L378 Elim1Store]: Elim1 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 7 treesize of output 3 [2024-11-09 04:42:20,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:42:21,012 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2024-11-09 04:42:21,013 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 128 treesize of output 83 [2024-11-09 04:42:21,532 INFO L349 Elim1Store]: treesize reduction 108, result has 34.9 percent of original size [2024-11-09 04:42:21,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 76 [2024-11-09 04:42:21,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:42:21,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 04:42:23,638 INFO L378 Elim1Store]: Elim1 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 7 treesize of output 3 [2024-11-09 04:42:28,075 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-09 04:42:28,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 151 treesize of output 58 [2024-11-09 04:42:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:42:35,084 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:42:38,094 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:42:38,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1949900905] [2024-11-09 04:42:38,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1949900905] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:42:38,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1675203472] [2024-11-09 04:42:38,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:42:38,095 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 04:42:38,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 04:42:38,098 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 04:42:38,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2024-11-09 04:42:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:42:39,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-09 04:42:39,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:42:39,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-09 04:42:43,896 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-09 04:42:43,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2024-11-09 04:42:45,175 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 04:42:45,964 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 04:42:47,407 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 04:42:47,524 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 26 [2024-11-09 04:42:49,582 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 04:42:49,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 29 [2024-11-09 04:42:49,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-09 04:42:49,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 04:43:03,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:43:03,876 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 04:43:03,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:43:04,031 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2024-11-09 04:43:04,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 49 [2024-11-09 04:43:04,406 INFO L349 Elim1Store]: treesize reduction 84, result has 35.9 percent of original size [2024-11-09 04:43:04,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 60 [2024-11-09 04:43:05,444 INFO L378 Elim1Store]: Elim1 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 7 treesize of output 3 [2024-11-09 04:43:07,442 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 04:43:07,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 40 [2024-11-09 04:43:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:43:09,824 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:43:11,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1675203472] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:43:11,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212730571] [2024-11-09 04:43:11,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:43:11,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:43:11,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:43:11,195 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:43:11,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fcf9c95-b7bf-47dd-914d-73d7cbb31693/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-09 04:43:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:43:11,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-09 04:43:11,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:43:11,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-09 04:43:14,249 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-09 04:43:14,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2024-11-09 04:43:17,558 INFO L349 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2024-11-09 04:43:17,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2024-11-09 04:43:19,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 04:43:20,051 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 04:43:20,052 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 1 case distinctions, treesize of input 51 treesize of output 46 [2024-11-09 04:43:21,807 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-09 04:43:21,808 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 32 [2024-11-09 04:43:22,006 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2024-11-09 04:43:26,469 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= (_ bv0 1) (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$.offset| |node_create_~temp~0#1.base|)) |c_#memory_$Pointer$.offset|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$.base| |node_create_~temp~0#1.base|))))) is different from true [2024-11-09 04:43:26,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:43:26,692 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2024-11-09 04:43:26,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 61 [2024-11-09 04:43:27,135 INFO L349 Elim1Store]: treesize reduction 108, result has 34.9 percent of original size [2024-11-09 04:43:27,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 76 [2024-11-09 04:43:27,197 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 16 treesize of output 11 [2024-11-09 04:43:27,367 INFO L378 Elim1Store]: Elim1 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 7 treesize of output 3 [2024-11-09 04:43:29,537 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-09 04:43:29,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 36 [2024-11-09 04:43:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2024-11-09 04:43:31,756 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:43:38,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212730571] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:43:38,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:43:38,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 80 [2024-11-09 04:43:38,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421418816] [2024-11-09 04:43:38,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:43:38,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-11-09 04:43:38,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:43:38,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-11-09 04:43:38,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=7237, Unknown=40, NotChecked=172, Total=7832 [2024-11-09 04:43:38,272 INFO L87 Difference]: Start difference. First operand 126 states and 137 transitions. Second operand has 81 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 67 states have internal predecessors, (146), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9)