./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/queue_ok_longest.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b 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_f4c66ea9-85b8-4b05-9048-fe9004513d2a/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c66ea9-85b8-4b05-9048-fe9004513d2a/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c66ea9-85b8-4b05-9048-fe9004513d2a/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c66ea9-85b8-4b05-9048-fe9004513d2a/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/queue_ok_longest.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c66ea9-85b8-4b05-9048-fe9004513d2a/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c66ea9-85b8-4b05-9048-fe9004513d2a/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --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 0e9bc4a9a6dcd238ac18925269a0bd7c8c54c2dafb57744151e37b58cf6eab8d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:28:13,962 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:28:14,097 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c66ea9-85b8-4b05-9048-fe9004513d2a/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 20:28:14,107 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:28:14,107 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:28:14,160 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:28:14,161 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:28:14,161 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:28:14,162 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:28:14,170 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:28:14,170 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:28:14,172 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:28:14,172 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:28:14,174 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:28:14,175 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:28:14,175 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:28:14,175 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:28:14,176 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:28:14,176 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:28:14,177 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:28:14,177 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:28:14,178 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:28:14,178 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 20:28:14,179 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 20:28:14,180 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:28:14,180 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:28:14,180 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:28:14,181 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:28:14,181 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:28:14,182 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 20:28:14,183 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 20:28:14,183 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 20:28:14,183 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:28:14,184 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 20:28:14,184 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 20:28:14,184 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:28:14,184 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:28:14,185 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:28:14,185 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:28:14,185 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:28:14,185 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:28:14,186 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:28:14,186 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:28:14,186 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:28:14,187 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:28:14,187 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:28:14,187 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_f4c66ea9-85b8-4b05-9048-fe9004513d2a/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c66ea9-85b8-4b05-9048-fe9004513d2a/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e9bc4a9a6dcd238ac18925269a0bd7c8c54c2dafb57744151e37b58cf6eab8d [2023-11-06 20:28:14,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:28:14,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:28:14,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:28:14,547 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:28:14,549 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:28:14,550 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c66ea9-85b8-4b05-9048-fe9004513d2a/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/pthread/queue_ok_longest.i [2023-11-06 20:28:17,739 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:28:18,035 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:28:18,036 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c66ea9-85b8-4b05-9048-fe9004513d2a/sv-benchmarks/c/pthread/queue_ok_longest.i [2023-11-06 20:28:18,075 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c66ea9-85b8-4b05-9048-fe9004513d2a/bin/utaipan-verify-FOvIYxoinp/data/b9dfcd422/cb36ffa8a93640a085c5e91b17e3c054/FLAGd662f0556 [2023-11-06 20:28:18,098 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c66ea9-85b8-4b05-9048-fe9004513d2a/bin/utaipan-verify-FOvIYxoinp/data/b9dfcd422/cb36ffa8a93640a085c5e91b17e3c054 [2023-11-06 20:28:18,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:28:18,109 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:28:18,112 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:28:18,113 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:28:18,118 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:28:18,119 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:28:18" (1/1) ... [2023-11-06 20:28:18,120 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dc208b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:18, skipping insertion in model container [2023-11-06 20:28:18,121 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:28:18" (1/1) ... [2023-11-06 20:28:18,186 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:28:18,743 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:28:18,760 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:28:18,856 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:28:18,972 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:28:18,986 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:18 WrapperNode [2023-11-06 20:28:18,986 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:28:18,987 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:28:18,987 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:28:18,988 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:28:18,995 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:18" (1/1) ... [2023-11-06 20:28:19,046 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:18" (1/1) ... [2023-11-06 20:28:19,099 INFO L138 Inliner]: procedures = 274, calls = 59, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 208 [2023-11-06 20:28:19,099 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:28:19,100 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:28:19,100 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:28:19,100 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:28:19,110 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:18" (1/1) ... [2023-11-06 20:28:19,110 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:18" (1/1) ... [2023-11-06 20:28:19,127 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:18" (1/1) ... [2023-11-06 20:28:19,128 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:18" (1/1) ... [2023-11-06 20:28:19,154 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:18" (1/1) ... [2023-11-06 20:28:19,158 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:18" (1/1) ... [2023-11-06 20:28:19,160 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:18" (1/1) ... [2023-11-06 20:28:19,179 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:18" (1/1) ... [2023-11-06 20:28:19,183 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:28:19,184 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:28:19,184 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:28:19,184 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:28:19,185 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:18" (1/1) ... [2023-11-06 20:28:19,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:28:19,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c66ea9-85b8-4b05-9048-fe9004513d2a/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:28:19,223 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c66ea9-85b8-4b05-9048-fe9004513d2a/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:28:19,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c66ea9-85b8-4b05-9048-fe9004513d2a/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:28:19,266 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-06 20:28:19,267 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-06 20:28:19,267 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-06 20:28:19,267 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-06 20:28:19,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 20:28:19,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:28:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 20:28:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 20:28:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 20:28:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:28:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 20:28:19,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:28:19,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:28:19,270 WARN L210 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 20:28:19,469 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:28:19,471 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:28:20,015 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:28:20,029 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:28:20,032 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 20:28:20,036 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:28:20 BoogieIcfgContainer [2023-11-06 20:28:20,038 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:28:20,041 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:28:20,042 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:28:20,046 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:28:20,046 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:28:18" (1/3) ... [2023-11-06 20:28:20,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e84b75a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:28:20, skipping insertion in model container [2023-11-06 20:28:20,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:18" (2/3) ... [2023-11-06 20:28:20,050 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e84b75a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:28:20, skipping insertion in model container [2023-11-06 20:28:20,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:28:20" (3/3) ... [2023-11-06 20:28:20,051 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok_longest.i [2023-11-06 20:28:20,072 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:28:20,072 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 61 error locations. [2023-11-06 20:28:20,072 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 20:28:20,269 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 20:28:20,309 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-06 20:28:20,325 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 290 places, 298 transitions, 610 flow [2023-11-06 20:28:20,328 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 290 places, 298 transitions, 610 flow [2023-11-06 20:28:20,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 298 transitions, 610 flow [2023-11-06 20:28:20,449 INFO L124 PetriNetUnfolderBase]: 15/296 cut-off events. [2023-11-06 20:28:20,449 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 20:28:20,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305 conditions, 296 events. 15/296 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 704 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 196. Up to 3 conditions per place. [2023-11-06 20:28:20,484 INFO L119 LiptonReduction]: Number of co-enabled transitions 19748 [2023-11-06 20:28:41,750 INFO L134 LiptonReduction]: Checked pairs total: 64649 [2023-11-06 20:28:41,750 INFO L136 LiptonReduction]: Total number of compositions: 485 [2023-11-06 20:28:41,762 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 109 places, 109 transitions, 232 flow [2023-11-06 20:28:42,067 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 5589 states, 4122 states have (on average 3.8469189713731198) internal successors, (15857), 5588 states have internal predecessors, (15857), 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) [2023-11-06 20:28:42,095 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:28:42,104 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;@363447fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:28:42,104 INFO L358 AbstractCegarLoop]: Starting to check reachability of 104 error locations. [2023-11-06 20:28:42,123 INFO L276 IsEmpty]: Start isEmpty. Operand has 5589 states, 4122 states have (on average 3.8469189713731198) internal successors, (15857), 5588 states have internal predecessors, (15857), 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) [2023-11-06 20:28:42,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2023-11-06 20:28:42,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:28:42,130 INFO L195 NwaCegarLoop]: trace histogram [1] [2023-11-06 20:28:42,131 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 20:28:42,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:28:42,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1349, now seen corresponding path program 1 times [2023-11-06 20:28:42,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:28:42,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946151851] [2023-11-06 20:28:42,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:42,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:28:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:28:42,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:28:42,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946151851] [2023-11-06 20:28:42,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946151851] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:28:42,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:28:42,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 20:28:42,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117161081] [2023-11-06 20:28:42,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:28:42,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 20:28:42,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:28:42,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 20:28:42,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 20:28:42,368 INFO L87 Difference]: Start difference. First operand has 5589 states, 4122 states have (on average 3.8469189713731198) internal successors, (15857), 5588 states have internal predecessors, (15857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2023-11-06 20:28:42,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:28:42,591 INFO L93 Difference]: Finished difference Result 2668 states and 7688 transitions. [2023-11-06 20:28:42,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 20:28:42,593 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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 1 [2023-11-06 20:28:42,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:28:42,643 INFO L225 Difference]: With dead ends: 2668 [2023-11-06 20:28:42,643 INFO L226 Difference]: Without dead ends: 2668 [2023-11-06 20:28:42,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 20:28:42,648 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:28:42,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:28:42,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2023-11-06 20:28:42,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 2668. [2023-11-06 20:28:42,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2668 states, 2340 states have (on average 3.2854700854700853) internal successors, (7688), 2667 states have internal predecessors, (7688), 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) [2023-11-06 20:28:42,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2668 states to 2668 states and 7688 transitions. [2023-11-06 20:28:42,878 INFO L78 Accepts]: Start accepts. Automaton has 2668 states and 7688 transitions. Word has length 1 [2023-11-06 20:28:42,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:28:42,879 INFO L495 AbstractCegarLoop]: Abstraction has 2668 states and 7688 transitions. [2023-11-06 20:28:42,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2023-11-06 20:28:42,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2668 states and 7688 transitions. [2023-11-06 20:28:42,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 20:28:42,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:28:42,881 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 20:28:42,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:28:42,881 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 20:28:42,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:28:42,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1325533, now seen corresponding path program 1 times [2023-11-06 20:28:42,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:28:42,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410225987] [2023-11-06 20:28:42,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:42,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:28:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:28:43,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:28:43,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410225987] [2023-11-06 20:28:43,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410225987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:28:43,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:28:43,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:28:43,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486087751] [2023-11-06 20:28:43,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:28:43,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:28:43,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:28:43,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:28:43,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:28:43,144 INFO L87 Difference]: Start difference. First operand 2668 states and 7688 transitions. Second operand has 3 states, 2 states have (on average 1.5) 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) [2023-11-06 20:28:43,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:28:43,323 INFO L93 Difference]: Finished difference Result 2618 states and 7583 transitions. [2023-11-06 20:28:43,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:28:43,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) 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 [2023-11-06 20:28:43,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:28:43,349 INFO L225 Difference]: With dead ends: 2618 [2023-11-06 20:28:43,349 INFO L226 Difference]: Without dead ends: 2618 [2023-11-06 20:28:43,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:28:43,351 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 65 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:28:43,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 4 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:28:43,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2023-11-06 20:28:43,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 2618. [2023-11-06 20:28:43,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 2310 states have (on average 3.2826839826839826) internal successors, (7583), 2617 states have internal predecessors, (7583), 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) [2023-11-06 20:28:43,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 7583 transitions. [2023-11-06 20:28:43,546 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 7583 transitions. Word has length 3 [2023-11-06 20:28:43,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:28:43,550 INFO L495 AbstractCegarLoop]: Abstraction has 2618 states and 7583 transitions. [2023-11-06 20:28:43,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) 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) [2023-11-06 20:28:43,551 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 7583 transitions. [2023-11-06 20:28:43,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 20:28:43,553 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:28:43,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 20:28:43,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 20:28:43,554 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 20:28:43,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:28:43,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1325534, now seen corresponding path program 1 times [2023-11-06 20:28:43,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:28:43,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233800675] [2023-11-06 20:28:43,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:43,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:28:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:28:43,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:28:43,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233800675] [2023-11-06 20:28:43,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233800675] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:28:43,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:28:43,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:28:43,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235918838] [2023-11-06 20:28:43,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:28:43,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:28:43,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:28:43,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:28:43,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:28:43,740 INFO L87 Difference]: Start difference. First operand 2618 states and 7583 transitions. Second operand has 3 states, 2 states have (on average 1.5) 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) [2023-11-06 20:28:43,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:28:43,910 INFO L93 Difference]: Finished difference Result 2568 states and 7478 transitions. [2023-11-06 20:28:43,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:28:43,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) 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 [2023-11-06 20:28:43,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:28:43,937 INFO L225 Difference]: With dead ends: 2568 [2023-11-06 20:28:43,937 INFO L226 Difference]: Without dead ends: 2568 [2023-11-06 20:28:43,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:28:43,942 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 63 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:28:43,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 4 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:28:43,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2023-11-06 20:28:44,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2568. [2023-11-06 20:28:44,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2280 states have (on average 3.2798245614035086) internal successors, (7478), 2567 states have internal predecessors, (7478), 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) [2023-11-06 20:28:44,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 7478 transitions. [2023-11-06 20:28:44,063 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 7478 transitions. Word has length 3 [2023-11-06 20:28:44,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:28:44,064 INFO L495 AbstractCegarLoop]: Abstraction has 2568 states and 7478 transitions. [2023-11-06 20:28:44,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) 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) [2023-11-06 20:28:44,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 7478 transitions. [2023-11-06 20:28:44,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-06 20:28:44,065 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:28:44,065 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 20:28:44,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 20:28:44,068 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-06 20:28:44,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:28:44,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1273858408, now seen corresponding path program 1 times [2023-11-06 20:28:44,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:28:44,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412026597] [2023-11-06 20:28:44,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:44,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:28:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:28:44,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:28:44,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412026597] [2023-11-06 20:28:44,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412026597] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:28:44,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:28:44,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:28:44,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944932117] [2023-11-06 20:28:44,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:28:44,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:28:44,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:28:44,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:28:44,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:28:44,323 INFO L87 Difference]: Start difference. First operand 2568 states and 7478 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)