./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr-deref.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire --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 c488feb98493d291286969cd9fdbd15fc14c729caece3fe94bd3c70430190936 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:18:43,754 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:18:43,883 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-23 21:18:43,891 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:18:43,892 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:18:43,936 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:18:43,937 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:18:43,937 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:18:43,939 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:18:43,944 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:18:43,945 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:18:43,945 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:18:43,946 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:18:43,948 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:18:43,949 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:18:43,949 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:18:43,950 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:18:43,952 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:18:43,952 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:18:43,953 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:18:43,953 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:18:43,954 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:18:43,955 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:18:43,955 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:18:43,957 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:18:43,957 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:18:43,958 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:18:43,958 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:18:43,959 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:18:43,959 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 21:18:43,961 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 21:18:43,961 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 21:18:43,961 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:18:43,962 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:18:43,962 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:18:43,962 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:18:43,963 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:18:43,963 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:18:43,964 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:18:43,964 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:18:43,964 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:18:43,965 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:18:43,965 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:18:43,965 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:18:43,966 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:18:43,967 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:18:43,967 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:18:43,967 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:18:43,968 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_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c488feb98493d291286969cd9fdbd15fc14c729caece3fe94bd3c70430190936 [2023-11-23 21:18:44,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:18:44,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:18:44,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:18:44,381 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:18:44,382 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:18:44,383 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr-deref.i [2023-11-23 21:18:47,550 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:18:47,839 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:18:47,846 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr-deref.i [2023-11-23 21:18:47,869 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/data/5b5ee290c/a78731af2ea841a3be1350097b04d198/FLAG8bfc5ea50 [2023-11-23 21:18:47,885 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/data/5b5ee290c/a78731af2ea841a3be1350097b04d198 [2023-11-23 21:18:47,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:18:47,889 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:18:47,891 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:18:47,892 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:18:47,898 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:18:47,899 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:18:47" (1/1) ... [2023-11-23 21:18:47,901 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2618532f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:47, skipping insertion in model container [2023-11-23 21:18:47,901 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:18:47" (1/1) ... [2023-11-23 21:18:48,023 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:18:48,786 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:18:48,812 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:18:48,901 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:18:49,085 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:18:49,086 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:49 WrapperNode [2023-11-23 21:18:49,086 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:18:49,088 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:18:49,088 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:18:49,088 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:18:49,097 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:49" (1/1) ... [2023-11-23 21:18:49,138 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:49" (1/1) ... [2023-11-23 21:18:49,193 INFO L138 Inliner]: procedures = 371, calls = 32, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 124 [2023-11-23 21:18:49,194 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:18:49,195 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:18:49,195 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:18:49,195 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:18:49,207 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:49" (1/1) ... [2023-11-23 21:18:49,207 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:49" (1/1) ... [2023-11-23 21:18:49,223 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:49" (1/1) ... [2023-11-23 21:18:49,232 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:49" (1/1) ... [2023-11-23 21:18:49,244 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:49" (1/1) ... [2023-11-23 21:18:49,250 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:49" (1/1) ... [2023-11-23 21:18:49,256 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:49" (1/1) ... [2023-11-23 21:18:49,258 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:49" (1/1) ... [2023-11-23 21:18:49,263 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:18:49,265 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:18:49,265 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:18:49,265 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:18:49,266 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:49" (1/1) ... [2023-11-23 21:18:49,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:18:49,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:18:49,313 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:18:49,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:18:49,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:18:49,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:18:49,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:18:49,357 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-23 21:18:49,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:18:49,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:18:49,358 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-23 21:18:49,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:18:49,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:18:49,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:18:49,359 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-23 21:18:49,359 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-23 21:18:49,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:18:49,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:18:49,361 WARN L213 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 21:18:49,603 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:18:49,606 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:18:50,189 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:18:50,522 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:18:50,524 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:18:50,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:18:50 BoogieIcfgContainer [2023-11-23 21:18:50,525 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:18:50,529 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:18:50,530 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:18:50,535 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:18:50,536 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:18:47" (1/3) ... [2023-11-23 21:18:50,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a1e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:18:50, skipping insertion in model container [2023-11-23 21:18:50,538 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:49" (2/3) ... [2023-11-23 21:18:50,541 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a1e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:18:50, skipping insertion in model container [2023-11-23 21:18:50,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:18:50" (3/3) ... [2023-11-23 21:18:50,543 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_11-arraylist_nr-deref.i [2023-11-23 21:18:50,575 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:18:50,575 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2023-11-23 21:18:50,576 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 21:18:50,666 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-23 21:18:50,711 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 77 places, 74 transitions, 152 flow [2023-11-23 21:18:50,779 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 438 states, 315 states have (on average 2.549206349206349) internal successors, (803), 437 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:50,802 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:18:50,810 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@54f5de3c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:18:50,810 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-23 21:18:50,815 INFO L276 IsEmpty]: Start isEmpty. Operand has 438 states, 315 states have (on average 2.549206349206349) internal successors, (803), 437 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:50,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-23 21:18:50,822 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:50,825 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-23 21:18:50,826 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-23 21:18:50,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:50,832 INFO L85 PathProgramCache]: Analyzing trace with hash 392809, now seen corresponding path program 1 times [2023-11-23 21:18:50,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:50,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039999065] [2023-11-23 21:18:50,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:50,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:18:51,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:51,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039999065] [2023-11-23 21:18:51,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039999065] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:51,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:51,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:18:51,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579886627] [2023-11-23 21:18:51,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:51,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:18:51,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:51,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:18:51,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:18:51,204 INFO L87 Difference]: Start difference. First operand has 438 states, 315 states have (on average 2.549206349206349) internal successors, (803), 437 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:51,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:51,322 INFO L93 Difference]: Finished difference Result 439 states and 804 transitions. [2023-11-23 21:18:51,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:18:51,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-23 21:18:51,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:51,344 INFO L225 Difference]: With dead ends: 439 [2023-11-23 21:18:51,344 INFO L226 Difference]: Without dead ends: 439 [2023-11-23 21:18:51,346 INFO L412 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 [2023-11-23 21:18:51,350 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:51,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 94 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:18:51,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2023-11-23 21:18:51,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 439. [2023-11-23 21:18:51,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 316 states have (on average 2.5443037974683542) internal successors, (804), 438 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:51,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 804 transitions. [2023-11-23 21:18:51,436 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 804 transitions. Word has length 3 [2023-11-23 21:18:51,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:51,437 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 804 transitions. [2023-11-23 21:18:51,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:51,438 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 804 transitions. [2023-11-23 21:18:51,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-23 21:18:51,438 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:51,439 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-23 21:18:51,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:18:51,439 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-23 21:18:51,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:51,440 INFO L85 PathProgramCache]: Analyzing trace with hash 12174669, now seen corresponding path program 1 times [2023-11-23 21:18:51,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:51,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318382813] [2023-11-23 21:18:51,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:51,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:51,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:18:51,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:51,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318382813] [2023-11-23 21:18:51,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318382813] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:18:51,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529903305] [2023-11-23 21:18:51,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:51,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:51,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:18:51,578 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:18:51,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:18:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:51,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:18:51,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:18:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:18:51,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:18:51,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:18:51,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529903305] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:18:51,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [677083586] [2023-11-23 21:18:51,775 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) 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:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) 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) [2023-11-23 21:18:51,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:18:51,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-23 21:18:51,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957898300] [2023-11-23 21:18:51,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:18:51,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:18:51,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:51,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:18:51,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:18:51,784 INFO L87 Difference]: Start difference. First operand 439 states and 804 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:51,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:51,901 INFO L93 Difference]: Finished difference Result 442 states and 807 transitions. [2023-11-23 21:18:51,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:18:51,903 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-23 21:18:51,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:51,908 INFO L225 Difference]: With dead ends: 442 [2023-11-23 21:18:51,913 INFO L226 Difference]: Without dead ends: 442 [2023-11-23 21:18:51,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:18:51,915 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:51,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 94 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:18:51,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2023-11-23 21:18:51,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2023-11-23 21:18:51,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 319 states have (on average 2.529780564263323) internal successors, (807), 441 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:51,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 807 transitions. [2023-11-23 21:18:51,963 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 807 transitions. Word has length 4 [2023-11-23 21:18:51,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:51,964 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 807 transitions. [2023-11-23 21:18:51,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:51,964 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 807 transitions. [2023-11-23 21:18:51,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:18:51,965 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:51,966 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1] [2023-11-23 21:18:51,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 21:18:52,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:52,180 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-23 21:18:52,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:52,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1915918185, now seen corresponding path program 2 times [2023-11-23 21:18:52,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:52,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420027583] [2023-11-23 21:18:52,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:52,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:52,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 21:18:52,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:52,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420027583] [2023-11-23 21:18:52,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420027583] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:52,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:52,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:18:52,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038783846] [2023-11-23 21:18:52,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:52,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:18:52,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:52,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:18:52,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:18:52,342 INFO L87 Difference]: Start difference. First operand 442 states and 807 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:52,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:52,444 INFO L93 Difference]: Finished difference Result 438 states and 803 transitions. [2023-11-23 21:18:52,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:18:52,445 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-23 21:18:52,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:52,448 INFO L225 Difference]: With dead ends: 438 [2023-11-23 21:18:52,448 INFO L226 Difference]: Without dead ends: 438 [2023-11-23 21:18:52,449 INFO L412 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 [2023-11-23 21:18:52,450 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:52,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 53 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:18:52,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2023-11-23 21:18:52,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 438. [2023-11-23 21:18:52,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 319 states have (on average 2.5172413793103448) internal successors, (803), 437 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:52,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 803 transitions. [2023-11-23 21:18:52,469 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 803 transitions. Word has length 7 [2023-11-23 21:18:52,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:52,469 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 803 transitions. [2023-11-23 21:18:52,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:52,470 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 803 transitions. [2023-11-23 21:18:52,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:18:52,470 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:52,470 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1] [2023-11-23 21:18:52,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:18:52,471 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-23 21:18:52,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:52,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1915918186, now seen corresponding path program 1 times [2023-11-23 21:18:52,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:52,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842685680] [2023-11-23 21:18:52,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:52,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:18:52,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:52,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842685680] [2023-11-23 21:18:52,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842685680] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:18:52,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802700579] [2023-11-23 21:18:52,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:52,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:52,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:18:52,623 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:18:52,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:18:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:52,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:18:52,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:18:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:18:52,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:18:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:18:52,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802700579] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:18:52,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1492249705] [2023-11-23 21:18:52,847 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) 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:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) 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) [2023-11-23 21:18:52,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:18:52,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-23 21:18:52,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134927600] [2023-11-23 21:18:52,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:18:52,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 21:18:52,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:52,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 21:18:52,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:18:52,850 INFO L87 Difference]: Start difference. First operand 438 states and 803 transitions. Second operand has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:52,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:52,983 INFO L93 Difference]: Finished difference Result 444 states and 809 transitions. [2023-11-23 21:18:52,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:18:52,984 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-23 21:18:52,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:52,987 INFO L225 Difference]: With dead ends: 444 [2023-11-23 21:18:52,987 INFO L226 Difference]: Without dead ends: 444 [2023-11-23 21:18:52,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:18:52,992 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:52,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 215 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:18:53,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2023-11-23 21:18:53,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 444. [2023-11-23 21:18:53,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 325 states have (on average 2.4892307692307694) internal successors, (809), 443 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:53,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 809 transitions. [2023-11-23 21:18:53,018 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 809 transitions. Word has length 7 [2023-11-23 21:18:53,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:53,018 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 809 transitions. [2023-11-23 21:18:53,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:53,019 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 809 transitions. [2023-11-23 21:18:53,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 21:18:53,020 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:53,020 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1] [2023-11-23 21:18:53,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:18:53,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:53,240 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-23 21:18:53,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:53,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1786711274, now seen corresponding path program 2 times [2023-11-23 21:18:53,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:53,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186714062] [2023-11-23 21:18:53,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:53,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:53,421 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-23 21:18:53,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:53,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186714062] [2023-11-23 21:18:53,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186714062] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:53,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:53,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:18:53,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471073645] [2023-11-23 21:18:53,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:53,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:18:53,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:53,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:18:53,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:18:53,424 INFO L87 Difference]: Start difference. First operand 444 states and 809 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:53,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:53,524 INFO L93 Difference]: Finished difference Result 440 states and 805 transitions. [2023-11-23 21:18:53,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:18:53,525 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-23 21:18:53,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:53,528 INFO L225 Difference]: With dead ends: 440 [2023-11-23 21:18:53,528 INFO L226 Difference]: Without dead ends: 440 [2023-11-23 21:18:53,529 INFO L412 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 [2023-11-23 21:18:53,530 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:53,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 54 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:18:53,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2023-11-23 21:18:53,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2023-11-23 21:18:53,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 325 states have (on average 2.476923076923077) internal successors, (805), 439 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:53,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 805 transitions. [2023-11-23 21:18:53,545 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 805 transitions. Word has length 13 [2023-11-23 21:18:53,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:53,546 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 805 transitions. [2023-11-23 21:18:53,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:53,546 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 805 transitions. [2023-11-23 21:18:53,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 21:18:53,547 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:53,547 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2023-11-23 21:18:53,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:18:53,547 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-23 21:18:53,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:53,548 INFO L85 PathProgramCache]: Analyzing trace with hash -957374000, now seen corresponding path program 1 times [2023-11-23 21:18:53,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:53,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809199022] [2023-11-23 21:18:53,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:53,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:53,759 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-23 21:18:53,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:53,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809199022] [2023-11-23 21:18:53,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809199022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:53,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:53,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:18:53,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574946232] [2023-11-23 21:18:53,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:53,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:18:53,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:53,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:18:53,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:18:53,762 INFO L87 Difference]: Start difference. First operand 440 states and 805 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:53,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:53,895 INFO L93 Difference]: Finished difference Result 434 states and 781 transitions. [2023-11-23 21:18:53,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:18:53,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-23 21:18:53,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:53,899 INFO L225 Difference]: With dead ends: 434 [2023-11-23 21:18:53,899 INFO L226 Difference]: Without dead ends: 434 [2023-11-23 21:18:53,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:18:53,901 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 130 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:53,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 22 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:18:53,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2023-11-23 21:18:53,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 401. [2023-11-23 21:18:53,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 306 states have (on average 2.3856209150326797) internal successors, (730), 400 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:53,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 730 transitions. [2023-11-23 21:18:53,917 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 730 transitions. Word has length 15 [2023-11-23 21:18:53,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:53,917 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 730 transitions. [2023-11-23 21:18:53,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:53,932 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 730 transitions. [2023-11-23 21:18:53,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 21:18:53,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:53,933 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2023-11-23 21:18:53,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:18:53,933 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-23 21:18:53,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:53,934 INFO L85 PathProgramCache]: Analyzing trace with hash -957373999, now seen corresponding path program 1 times [2023-11-23 21:18:53,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:53,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563006387] [2023-11-23 21:18:53,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:53,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-23 21:18:54,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:54,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563006387] [2023-11-23 21:18:54,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563006387] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:54,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:54,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:18:54,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629655873] [2023-11-23 21:18:54,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:54,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:18:54,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:54,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:18:54,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:18:54,261 INFO L87 Difference]: Start difference. First operand 401 states and 730 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:54,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:54,483 INFO L93 Difference]: Finished difference Result 418 states and 762 transitions. [2023-11-23 21:18:54,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:18:54,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-23 21:18:54,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:54,487 INFO L225 Difference]: With dead ends: 418 [2023-11-23 21:18:54,488 INFO L226 Difference]: Without dead ends: 418 [2023-11-23 21:18:54,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:18:54,489 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 122 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:54,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 9 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:18:54,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2023-11-23 21:18:54,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 376. [2023-11-23 21:18:54,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 295 states have (on average 2.3152542372881357) internal successors, (683), 375 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:54,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 683 transitions. [2023-11-23 21:18:54,503 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 683 transitions. Word has length 15 [2023-11-23 21:18:54,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:54,503 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 683 transitions. [2023-11-23 21:18:54,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:54,504 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 683 transitions. [2023-11-23 21:18:54,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:18:54,504 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:54,505 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:18:54,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:18:54,505 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-23 21:18:54,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:54,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1603266961, now seen corresponding path program 1 times [2023-11-23 21:18:54,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:54,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444376634] [2023-11-23 21:18:54,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:54,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-23 21:18:55,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:55,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444376634] [2023-11-23 21:18:55,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444376634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:55,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:55,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:18:55,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305815600] [2023-11-23 21:18:55,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:55,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:18:55,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:55,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:18:55,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:18:55,049 INFO L87 Difference]: Start difference. First operand 376 states and 683 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:55,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:55,302 INFO L93 Difference]: Finished difference Result 374 states and 681 transitions. [2023-11-23 21:18:55,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:18:55,303 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-23 21:18:55,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:55,306 INFO L225 Difference]: With dead ends: 374 [2023-11-23 21:18:55,307 INFO L226 Difference]: Without dead ends: 374 [2023-11-23 21:18:55,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:18:55,308 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:55,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 77 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:18:55,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-11-23 21:18:55,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2023-11-23 21:18:55,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 295 states have (on average 2.3084745762711862) internal successors, (681), 373 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:55,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 681 transitions. [2023-11-23 21:18:55,322 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 681 transitions. Word has length 19 [2023-11-23 21:18:55,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:55,322 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 681 transitions. [2023-11-23 21:18:55,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:55,323 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 681 transitions. [2023-11-23 21:18:55,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:18:55,323 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:55,324 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:18:55,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:18:55,324 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-23 21:18:55,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:55,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1603266960, now seen corresponding path program 1 times [2023-11-23 21:18:55,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:55,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820494990] [2023-11-23 21:18:55,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:55,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-23 21:18:56,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:56,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820494990] [2023-11-23 21:18:56,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820494990] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:56,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:56,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:18:56,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706356059] [2023-11-23 21:18:56,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:56,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:18:56,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:56,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:18:56,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:18:56,026 INFO L87 Difference]: Start difference. First operand 374 states and 681 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:56,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:56,240 INFO L93 Difference]: Finished difference Result 372 states and 679 transitions. [2023-11-23 21:18:56,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:18:56,241 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-23 21:18:56,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:56,243 INFO L225 Difference]: With dead ends: 372 [2023-11-23 21:18:56,244 INFO L226 Difference]: Without dead ends: 372 [2023-11-23 21:18:56,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:18:56,245 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:56,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 71 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:18:56,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2023-11-23 21:18:56,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2023-11-23 21:18:56,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 295 states have (on average 2.301694915254237) internal successors, (679), 371 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:56,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 679 transitions. [2023-11-23 21:18:56,258 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 679 transitions. Word has length 19 [2023-11-23 21:18:56,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:56,258 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 679 transitions. [2023-11-23 21:18:56,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:56,259 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 679 transitions. [2023-11-23 21:18:56,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 21:18:56,261 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:56,261 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:18:56,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:18:56,261 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-23 21:18:56,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:56,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1153724428, now seen corresponding path program 1 times [2023-11-23 21:18:56,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:56,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285564292] [2023-11-23 21:18:56,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:56,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-23 21:18:56,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:56,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285564292] [2023-11-23 21:18:56,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285564292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:56,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:56,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:18:56,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128270847] [2023-11-23 21:18:56,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:56,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:18:56,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:56,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:18:56,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:18:56,428 INFO L87 Difference]: Start difference. First operand 372 states and 679 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:56,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:56,583 INFO L93 Difference]: Finished difference Result 371 states and 678 transitions. [2023-11-23 21:18:56,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:18:56,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-23 21:18:56,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:56,586 INFO L225 Difference]: With dead ends: 371 [2023-11-23 21:18:56,587 INFO L226 Difference]: Without dead ends: 371 [2023-11-23 21:18:56,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:18:56,588 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:56,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 54 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:18:56,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2023-11-23 21:18:56,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2023-11-23 21:18:56,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 295 states have (on average 2.298305084745763) internal successors, (678), 370 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:56,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 678 transitions. [2023-11-23 21:18:56,600 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 678 transitions. Word has length 21 [2023-11-23 21:18:56,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:56,601 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 678 transitions. [2023-11-23 21:18:56,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:56,601 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 678 transitions. [2023-11-23 21:18:56,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 21:18:56,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:56,602 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:18:56,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 21:18:56,602 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-23 21:18:56,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:56,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1153724429, now seen corresponding path program 1 times [2023-11-23 21:18:56,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:56,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489599518] [2023-11-23 21:18:56,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:56,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-23 21:18:56,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:56,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489599518] [2023-11-23 21:18:56,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489599518] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:56,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:56,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:18:56,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840147784] [2023-11-23 21:18:56,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:56,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:18:56,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:56,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:18:56,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:18:56,896 INFO L87 Difference]: Start difference. First operand 371 states and 678 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:57,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:57,051 INFO L93 Difference]: Finished difference Result 370 states and 677 transitions. [2023-11-23 21:18:57,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:18:57,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-23 21:18:57,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:57,056 INFO L225 Difference]: With dead ends: 370 [2023-11-23 21:18:57,056 INFO L226 Difference]: Without dead ends: 370 [2023-11-23 21:18:57,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:18:57,058 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:57,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 57 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:18:57,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2023-11-23 21:18:57,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2023-11-23 21:18:57,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 295 states have (on average 2.294915254237288) internal successors, (677), 369 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:57,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 677 transitions. [2023-11-23 21:18:57,075 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 677 transitions. Word has length 21 [2023-11-23 21:18:57,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:57,076 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 677 transitions. [2023-11-23 21:18:57,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:57,077 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 677 transitions. [2023-11-23 21:18:57,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-23 21:18:57,077 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:57,077 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:18:57,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 21:18:57,079 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-23 21:18:57,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:57,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1405719305, now seen corresponding path program 1 times [2023-11-23 21:18:57,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:57,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677266038] [2023-11-23 21:18:57,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:57,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:57,369 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-23 21:18:57,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:57,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677266038] [2023-11-23 21:18:57,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677266038] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:57,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:57,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:18:57,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627759422] [2023-11-23 21:18:57,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:57,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:18:57,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:57,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:18:57,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:18:57,371 INFO L87 Difference]: Start difference. First operand 370 states and 677 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:57,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:57,512 INFO L93 Difference]: Finished difference Result 369 states and 676 transitions. [2023-11-23 21:18:57,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:18:57,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-23 21:18:57,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:57,516 INFO L225 Difference]: With dead ends: 369 [2023-11-23 21:18:57,517 INFO L226 Difference]: Without dead ends: 369 [2023-11-23 21:18:57,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:18:57,518 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:57,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 32 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:18:57,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2023-11-23 21:18:57,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2023-11-23 21:18:57,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 295 states have (on average 2.2915254237288134) internal successors, (676), 368 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:57,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 676 transitions. [2023-11-23 21:18:57,545 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 676 transitions. Word has length 22 [2023-11-23 21:18:57,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:57,545 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 676 transitions. [2023-11-23 21:18:57,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:57,546 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 676 transitions. [2023-11-23 21:18:57,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-23 21:18:57,546 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:57,546 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:18:57,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 21:18:57,547 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-23 21:18:57,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:57,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1405719306, now seen corresponding path program 1 times [2023-11-23 21:18:57,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:57,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498858029] [2023-11-23 21:18:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:57,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:57,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-23 21:18:57,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:57,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498858029] [2023-11-23 21:18:57,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498858029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:57,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:57,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:18:57,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168667303] [2023-11-23 21:18:57,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:57,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:18:57,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:57,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:18:57,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:18:57,906 INFO L87 Difference]: Start difference. First operand 369 states and 676 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:58,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:58,060 INFO L93 Difference]: Finished difference Result 368 states and 675 transitions. [2023-11-23 21:18:58,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:18:58,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-23 21:18:58,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:58,064 INFO L225 Difference]: With dead ends: 368 [2023-11-23 21:18:58,064 INFO L226 Difference]: Without dead ends: 368 [2023-11-23 21:18:58,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:18:58,066 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 74 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:58,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 25 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:18:58,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-11-23 21:18:58,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2023-11-23 21:18:58,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 295 states have (on average 2.288135593220339) internal successors, (675), 367 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 675 transitions. [2023-11-23 21:18:58,082 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 675 transitions. Word has length 22 [2023-11-23 21:18:58,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:58,082 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 675 transitions. [2023-11-23 21:18:58,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:58,083 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 675 transitions. [2023-11-23 21:18:58,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 21:18:58,084 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:58,084 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:18:58,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 21:18:58,085 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-23 21:18:58,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:58,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1598045135, now seen corresponding path program 1 times [2023-11-23 21:18:58,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:58,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437816160] [2023-11-23 21:18:58,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:58,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:58,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-23 21:18:58,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:58,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437816160] [2023-11-23 21:18:58,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437816160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:58,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:58,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:18:58,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978982550] [2023-11-23 21:18:58,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:58,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:18:58,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:58,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:18:58,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:18:58,227 INFO L87 Difference]: Start difference. First operand 368 states and 675 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:58,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:58,354 INFO L93 Difference]: Finished difference Result 356 states and 647 transitions. [2023-11-23 21:18:58,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:18:58,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-23 21:18:58,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:58,359 INFO L225 Difference]: With dead ends: 356 [2023-11-23 21:18:58,359 INFO L226 Difference]: Without dead ends: 356 [2023-11-23 21:18:58,359 INFO L412 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 [2023-11-23 21:18:58,360 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:58,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 32 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:18:58,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2023-11-23 21:18:58,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 350. [2023-11-23 21:18:58,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 285 states have (on average 2.256140350877193) internal successors, (643), 349 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:58,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 643 transitions. [2023-11-23 21:18:58,376 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 643 transitions. Word has length 27 [2023-11-23 21:18:58,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:58,377 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 643 transitions. [2023-11-23 21:18:58,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:58,377 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 643 transitions. [2023-11-23 21:18:58,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 21:18:58,378 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:58,379 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:18:58,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-23 21:18:58,379 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-23 21:18:58,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:58,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1598045134, now seen corresponding path program 1 times [2023-11-23 21:18:58,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:58,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238530592] [2023-11-23 21:18:58,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:58,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-23 21:18:58,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:58,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238530592] [2023-11-23 21:18:58,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238530592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:58,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:58,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:18:58,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874594232] [2023-11-23 21:18:58,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:58,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:18:58,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:58,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:18:58,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:18:58,598 INFO L87 Difference]: Start difference. First operand 350 states and 643 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:58,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:58,716 INFO L93 Difference]: Finished difference Result 320 states and 579 transitions. [2023-11-23 21:18:58,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:18:58,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-23 21:18:58,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:58,720 INFO L225 Difference]: With dead ends: 320 [2023-11-23 21:18:58,720 INFO L226 Difference]: Without dead ends: 320 [2023-11-23 21:18:58,721 INFO L412 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 [2023-11-23 21:18:58,722 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:58,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:18:58,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-11-23 21:18:58,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2023-11-23 21:18:58,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 267 states have (on average 2.168539325842697) internal successors, (579), 319 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:58,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 579 transitions. [2023-11-23 21:18:58,736 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 579 transitions. Word has length 27 [2023-11-23 21:18:58,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:58,736 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 579 transitions. [2023-11-23 21:18:58,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:58,737 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 579 transitions. [2023-11-23 21:18:58,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 21:18:58,738 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:58,738 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:18:58,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-23 21:18:58,739 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-23 21:18:58,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:58,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1971185618, now seen corresponding path program 1 times [2023-11-23 21:18:58,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:58,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687976919] [2023-11-23 21:18:58,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:58,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-23 21:18:59,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:59,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687976919] [2023-11-23 21:18:59,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687976919] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:59,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:59,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-23 21:18:59,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506805262] [2023-11-23 21:18:59,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:59,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 21:18:59,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:59,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 21:18:59,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:18:59,720 INFO L87 Difference]: Start difference. First operand 320 states and 579 transitions. Second operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:00,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:00,289 INFO L93 Difference]: Finished difference Result 385 states and 690 transitions. [2023-11-23 21:19:00,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:19:00,290 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-23 21:19:00,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:00,293 INFO L225 Difference]: With dead ends: 385 [2023-11-23 21:19:00,293 INFO L226 Difference]: Without dead ends: 385 [2023-11-23 21:19:00,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2023-11-23 21:19:00,294 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 99 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:00,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 64 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:19:00,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2023-11-23 21:19:00,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 334. [2023-11-23 21:19:00,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 281 states have (on average 2.2170818505338077) internal successors, (623), 333 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:00,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 623 transitions. [2023-11-23 21:19:00,309 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 623 transitions. Word has length 28 [2023-11-23 21:19:00,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:00,309 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 623 transitions. [2023-11-23 21:19:00,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:00,310 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 623 transitions. [2023-11-23 21:19:00,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 21:19:00,311 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:00,311 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:00,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-23 21:19:00,311 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-23 21:19:00,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:00,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1971185619, now seen corresponding path program 1 times [2023-11-23 21:19:00,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:00,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919473930] [2023-11-23 21:19:00,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:00,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:00,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-23 21:19:01,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:01,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919473930] [2023-11-23 21:19:01,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919473930] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:01,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:01,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-23 21:19:01,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008386027] [2023-11-23 21:19:01,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:01,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 21:19:01,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:01,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 21:19:01,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:19:01,756 INFO L87 Difference]: Start difference. First operand 334 states and 623 transitions. Second operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:02,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:02,693 INFO L93 Difference]: Finished difference Result 366 states and 653 transitions. [2023-11-23 21:19:02,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:19:02,694 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-23 21:19:02,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:02,697 INFO L225 Difference]: With dead ends: 366 [2023-11-23 21:19:02,698 INFO L226 Difference]: Without dead ends: 366 [2023-11-23 21:19:02,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2023-11-23 21:19:02,699 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 106 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:02,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 23 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:19:02,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2023-11-23 21:19:02,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 330. [2023-11-23 21:19:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 277 states have (on average 2.1660649819494586) internal successors, (600), 329 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:02,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 600 transitions. [2023-11-23 21:19:02,715 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 600 transitions. Word has length 28 [2023-11-23 21:19:02,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:02,716 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 600 transitions. [2023-11-23 21:19:02,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:02,716 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 600 transitions. [2023-11-23 21:19:02,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 21:19:02,717 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:02,717 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:02,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-23 21:19:02,718 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-23 21:19:02,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:02,719 INFO L85 PathProgramCache]: Analyzing trace with hash 977212461, now seen corresponding path program 1 times [2023-11-23 21:19:02,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:02,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734138860] [2023-11-23 21:19:02,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:02,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-23 21:19:04,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:04,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734138860] [2023-11-23 21:19:04,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734138860] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:04,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:04,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-23 21:19:04,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927706625] [2023-11-23 21:19:04,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:04,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 21:19:04,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:04,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 21:19:04,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-11-23 21:19:04,896 INFO L87 Difference]: Start difference. First operand 330 states and 600 transitions. Second operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:06,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:06,089 INFO L93 Difference]: Finished difference Result 392 states and 703 transitions. [2023-11-23 21:19:06,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 21:19:06,090 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-23 21:19:06,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:06,093 INFO L225 Difference]: With dead ends: 392 [2023-11-23 21:19:06,094 INFO L226 Difference]: Without dead ends: 392 [2023-11-23 21:19:06,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2023-11-23 21:19:06,095 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 99 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:06,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 84 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:19:06,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2023-11-23 21:19:06,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 341. [2023-11-23 21:19:06,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 288 states have (on average 2.2083333333333335) internal successors, (636), 340 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:06,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 636 transitions. [2023-11-23 21:19:06,110 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 636 transitions. Word has length 29 [2023-11-23 21:19:06,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:06,111 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 636 transitions. [2023-11-23 21:19:06,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:06,112 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 636 transitions. [2023-11-23 21:19:06,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 21:19:06,112 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:06,112 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:06,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-23 21:19:06,113 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-23 21:19:06,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:06,114 INFO L85 PathProgramCache]: Analyzing trace with hash 977212462, now seen corresponding path program 1 times [2023-11-23 21:19:06,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:06,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282576948] [2023-11-23 21:19:06,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:06,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:06,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-23 21:19:08,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:08,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282576948] [2023-11-23 21:19:08,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282576948] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:08,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:08,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-23 21:19:08,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259360644] [2023-11-23 21:19:08,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:08,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 21:19:08,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:08,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 21:19:08,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:19:08,222 INFO L87 Difference]: Start difference. First operand 341 states and 636 transitions. Second operand has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:09,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:09,577 INFO L93 Difference]: Finished difference Result 437 states and 787 transitions. [2023-11-23 21:19:09,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 21:19:09,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-23 21:19:09,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:09,582 INFO L225 Difference]: With dead ends: 437 [2023-11-23 21:19:09,582 INFO L226 Difference]: Without dead ends: 437 [2023-11-23 21:19:09,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2023-11-23 21:19:09,583 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 124 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:09,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 39 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:19:09,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2023-11-23 21:19:09,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 337. [2023-11-23 21:19:09,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 284 states have (on average 2.158450704225352) internal successors, (613), 336 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:09,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 613 transitions. [2023-11-23 21:19:09,598 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 613 transitions. Word has length 29 [2023-11-23 21:19:09,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:09,598 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 613 transitions. [2023-11-23 21:19:09,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:09,599 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 613 transitions. [2023-11-23 21:19:09,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 21:19:09,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:09,599 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:09,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-23 21:19:09,600 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-23 21:19:09,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:09,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1876929778, now seen corresponding path program 1 times [2023-11-23 21:19:09,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:09,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070931738] [2023-11-23 21:19:09,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:09,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-23 21:19:10,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:10,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070931738] [2023-11-23 21:19:10,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070931738] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:10,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:10,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:19:10,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704642978] [2023-11-23 21:19:10,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:10,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 21:19:10,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:10,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 21:19:10,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:19:10,340 INFO L87 Difference]: Start difference. First operand 337 states and 613 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:10,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:10,757 INFO L93 Difference]: Finished difference Result 317 states and 572 transitions. [2023-11-23 21:19:10,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:19:10,758 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-23 21:19:10,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:10,761 INFO L225 Difference]: With dead ends: 317 [2023-11-23 21:19:10,761 INFO L226 Difference]: Without dead ends: 317 [2023-11-23 21:19:10,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:19:10,763 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 248 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:10,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 6 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:19:10,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-11-23 21:19:10,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 314. [2023-11-23 21:19:10,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 269 states have (on average 2.107806691449814) internal successors, (567), 313 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:10,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 567 transitions. [2023-11-23 21:19:10,782 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 567 transitions. Word has length 29 [2023-11-23 21:19:10,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:10,782 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 567 transitions. [2023-11-23 21:19:10,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:10,782 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 567 transitions. [2023-11-23 21:19:10,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 21:19:10,784 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:10,784 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:10,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-23 21:19:10,784 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-23 21:19:10,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:10,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1944718569, now seen corresponding path program 1 times [2023-11-23 21:19:10,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:10,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229209442] [2023-11-23 21:19:10,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:10,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:19:10,890 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 21:19:10,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:19:11,000 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-23 21:19:11,002 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 21:19:11,004 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 52 remaining) [2023-11-23 21:19:11,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 52 remaining) [2023-11-23 21:19:11,007 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 52 remaining) [2023-11-23 21:19:11,007 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 52 remaining) [2023-11-23 21:19:11,008 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 52 remaining) [2023-11-23 21:19:11,008 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 52 remaining) [2023-11-23 21:19:11,008 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 52 remaining) [2023-11-23 21:19:11,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 52 remaining) [2023-11-23 21:19:11,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 52 remaining) [2023-11-23 21:19:11,010 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 52 remaining) [2023-11-23 21:19:11,010 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 52 remaining) [2023-11-23 21:19:11,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 52 remaining) [2023-11-23 21:19:11,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 52 remaining) [2023-11-23 21:19:11,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 52 remaining) [2023-11-23 21:19:11,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 52 remaining) [2023-11-23 21:19:11,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 52 remaining) [2023-11-23 21:19:11,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 52 remaining) [2023-11-23 21:19:11,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 52 remaining) [2023-11-23 21:19:11,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 52 remaining) [2023-11-23 21:19:11,013 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 52 remaining) [2023-11-23 21:19:11,013 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 52 remaining) [2023-11-23 21:19:11,013 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 52 remaining) [2023-11-23 21:19:11,014 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 52 remaining) [2023-11-23 21:19:11,014 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 52 remaining) [2023-11-23 21:19:11,014 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 52 remaining) [2023-11-23 21:19:11,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 52 remaining) [2023-11-23 21:19:11,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 52 remaining) [2023-11-23 21:19:11,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK (24 of 52 remaining) [2023-11-23 21:19:11,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (23 of 52 remaining) [2023-11-23 21:19:11,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 52 remaining) [2023-11-23 21:19:11,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 52 remaining) [2023-11-23 21:19:11,017 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 52 remaining) [2023-11-23 21:19:11,017 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 52 remaining) [2023-11-23 21:19:11,017 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 52 remaining) [2023-11-23 21:19:11,017 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 52 remaining) [2023-11-23 21:19:11,018 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 52 remaining) [2023-11-23 21:19:11,018 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 52 remaining) [2023-11-23 21:19:11,018 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 52 remaining) [2023-11-23 21:19:11,018 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 52 remaining) [2023-11-23 21:19:11,019 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 52 remaining) [2023-11-23 21:19:11,019 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 52 remaining) [2023-11-23 21:19:11,019 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 52 remaining) [2023-11-23 21:19:11,019 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 52 remaining) [2023-11-23 21:19:11,020 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 52 remaining) [2023-11-23 21:19:11,020 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 52 remaining) [2023-11-23 21:19:11,020 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 52 remaining) [2023-11-23 21:19:11,020 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 52 remaining) [2023-11-23 21:19:11,021 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 52 remaining) [2023-11-23 21:19:11,021 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 52 remaining) [2023-11-23 21:19:11,021 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 52 remaining) [2023-11-23 21:19:11,021 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 52 remaining) [2023-11-23 21:19:11,022 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 52 remaining) [2023-11-23 21:19:11,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-23 21:19:11,026 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:11,035 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-23 21:19:11,035 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 21:19:11,104 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-23 21:19:11,109 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre42 could not be translated [2023-11-23 21:19:11,126 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 09:19:11 BasicIcfg [2023-11-23 21:19:11,126 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 21:19:11,127 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 21:19:11,127 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 21:19:11,127 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 21:19:11,128 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:18:50" (3/4) ... [2023-11-23 21:19:11,129 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-23 21:19:11,155 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-23 21:19:11,163 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre42 could not be translated [2023-11-23 21:19:11,230 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/witness.graphml [2023-11-23 21:19:11,230 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 21:19:11,232 INFO L158 Benchmark]: Toolchain (without parser) took 23341.77ms. Allocated memory was 151.0MB in the beginning and 356.5MB in the end (delta: 205.5MB). Free memory was 103.1MB in the beginning and 158.9MB in the end (delta: -55.8MB). Peak memory consumption was 151.2MB. Max. memory is 16.1GB. [2023-11-23 21:19:11,232 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 117.4MB. Free memory is still 69.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:19:11,232 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1195.66ms. Allocated memory is still 151.0MB. Free memory was 103.1MB in the beginning and 99.4MB in the end (delta: 3.8MB). Peak memory consumption was 26.5MB. Max. memory is 16.1GB. [2023-11-23 21:19:11,233 INFO L158 Benchmark]: Boogie Procedure Inliner took 106.30ms. Allocated memory is still 151.0MB. Free memory was 99.4MB in the beginning and 96.5MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 21:19:11,233 INFO L158 Benchmark]: Boogie Preprocessor took 69.03ms. Allocated memory is still 151.0MB. Free memory was 96.5MB in the beginning and 94.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 21:19:11,234 INFO L158 Benchmark]: RCFGBuilder took 1260.69ms. Allocated memory was 151.0MB in the beginning and 203.4MB in the end (delta: 52.4MB). Free memory was 94.5MB in the beginning and 162.1MB in the end (delta: -67.7MB). Peak memory consumption was 51.2MB. Max. memory is 16.1GB. [2023-11-23 21:19:11,234 INFO L158 Benchmark]: TraceAbstraction took 20596.78ms. Allocated memory was 203.4MB in the beginning and 356.5MB in the end (delta: 153.1MB). Free memory was 162.1MB in the beginning and 164.2MB in the end (delta: -2.0MB). Peak memory consumption was 151.1MB. Max. memory is 16.1GB. [2023-11-23 21:19:11,235 INFO L158 Benchmark]: Witness Printer took 103.95ms. Allocated memory is still 356.5MB. Free memory was 164.2MB in the beginning and 158.9MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-23 21:19:11,241 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 117.4MB. Free memory is still 69.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1195.66ms. Allocated memory is still 151.0MB. Free memory was 103.1MB in the beginning and 99.4MB in the end (delta: 3.8MB). Peak memory consumption was 26.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 106.30ms. Allocated memory is still 151.0MB. Free memory was 99.4MB in the beginning and 96.5MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 69.03ms. Allocated memory is still 151.0MB. Free memory was 96.5MB in the beginning and 94.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1260.69ms. Allocated memory was 151.0MB in the beginning and 203.4MB in the end (delta: 52.4MB). Free memory was 94.5MB in the beginning and 162.1MB in the end (delta: -67.7MB). Peak memory consumption was 51.2MB. Max. memory is 16.1GB. * TraceAbstraction took 20596.78ms. Allocated memory was 203.4MB in the beginning and 356.5MB in the end (delta: 153.1MB). Free memory was 162.1MB in the beginning and 164.2MB in the end (delta: -2.0MB). Peak memory consumption was 151.1MB. Max. memory is 16.1GB. * Witness Printer took 103.95ms. Allocated memory is still 356.5MB. Free memory was 164.2MB in the beginning and 158.9MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre42 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre42 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L1243] 0 pthread_mutex_t mutex[10]; [L1244] 0 struct s *slot[10]; [L1254] 0 int i = 0; VAL [i=0, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=1, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=2, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=3, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=4, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=5, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=6, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=7, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=8, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=9, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=10, mutex={1:0}, slot={2:0}] [L1254] COND FALSE 0 !(i < 10) [L1256] 0 int j = __VERIFIER_nondet_int(); [L1257] CALL 0 assume_abort_if_not(0 <= j && j < 10) [L11] COND FALSE 0 !(!cond) [L1257] RET 0 assume_abort_if_not(0 <= j && j < 10) [L1258] 0 struct s *p; [L1259] 0 pthread_t t1; [L1260] CALL, EXPR 0 new(1) [L1233] 0 struct s *p = malloc(sizeof(struct s)); [L1234] 0 p->datum = x VAL [\old(x)=1, mutex={1:0}, p={5:0}, slot={2:0}, x=1] [L1235] 0 p->next = ((void *)0) [L1236] 0 return p; [L1260] RET, EXPR 0 new(1) [L1260] 0 slot[j] = new(1) [L1261] CALL, EXPR 0 new(2) [L1233] 0 struct s *p = malloc(sizeof(struct s)); [L1234] 0 p->datum = x VAL [\old(x)=2, mutex={1:0}, p={-2:0}, slot={2:0}, x=2] [L1235] 0 p->next = ((void *)0) [L1236] 0 return p; [L1261] RET, EXPR 0 new(2) [L1261] EXPR 0 slot[j] [L1261] CALL 0 list_add(new(2), slot[j]) [L1239] EXPR 0 list->next [L1239] 0 struct s *temp = list->next; [L1240] 0 list->next = node VAL [list={5:0}, list={5:0}, mutex={1:0}, node={-2:0}, node={-2:0}, slot={2:0}, temp={0:0}] [L1241] 0 node->next = temp [L1261] RET 0 list_add(new(2), slot[j]) [L1262] FCALL, FORK 0 pthread_create(&t1, ((void *)0), t_fun, ((void *)0)) VAL [j=9, mutex={1:0}, slot={2:0}, t1={7:0}] [L1246] 1 int i = __VERIFIER_nondet_int(); [L1247] CALL 1 assume_abort_if_not(0 <= i && i < 10) [L11] COND FALSE 1 !(!cond) [L1247] RET 1 assume_abort_if_not(0 <= i && i < 10) [L1249] CALL, EXPR 1 new(3) [L1233] 1 struct s *p = malloc(sizeof(struct s)); [L1234] 1 p->datum = x VAL [\old(x)=3, \result={-2:0}, mutex={1:0}, p={-3:0}, slot={2:0}, x=3] [L1235] 1 p->next = ((void *)0) [L1236] 1 return p; [L1249] RET, EXPR 1 new(3) [L1249] EXPR 1 slot[i] [L1249] CALL 1 list_add(new(3), slot[i]) [L1239] 1 list->next - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1253]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1262]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 99 locations, 52 error locations. Started 1 CEGAR loops. OverallTime: 20.3s, OverallIterations: 21, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 7.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1107 SdHoareTripleChecker+Valid, 4.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1107 mSDsluCounter, 1137 SdHoareTripleChecker+Invalid, 3.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 704 mSDsCounter, 122 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3997 IncrementalHoareTripleChecker+Invalid, 4119 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 122 mSolverCounterUnsat, 433 mSDtfsCounter, 3997 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 185 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=444occurred in iteration=4, InterpolantAutomatonStates: 135, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 322 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 10.7s InterpolantComputationTime, 426 NumberOfCodeBlocks, 426 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 383 ConstructedInterpolants, 0 QuantifiedInterpolants, 3986 SizeOfPredicates, 0 NumberOfNonLiveVariables, 157 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 24 InterpolantComputations, 18 PerfectInterpolantSequences, 890/923 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-23 21:19:11,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f727178-535e-4584-8b78-667fa0f2fbd5/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)