./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe001_rmo.oepc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5615bd-9361-45ee-abc9-684cc38a60bf/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5615bd-9361-45ee-abc9-684cc38a60bf/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5615bd-9361-45ee-abc9-684cc38a60bf/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5615bd-9361-45ee-abc9-684cc38a60bf/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe001_rmo.oepc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5615bd-9361-45ee-abc9-684cc38a60bf/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5615bd-9361-45ee-abc9-684cc38a60bf/bin/utaipan-verify-t7M7D8N6sZ --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 0d3dfcdcbd1ef266a13f83c8ffcd1431cdbd44aa9b3fb0ca280daf8703879343 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:47:28,623 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:47:28,711 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5615bd-9361-45ee-abc9-684cc38a60bf/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-19 04:47:28,717 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:47:28,717 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:47:28,748 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:47:28,749 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:47:28,762 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:47:28,763 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:47:28,764 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:47:28,765 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:47:28,765 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:47:28,766 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:47:28,766 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:47:28,767 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:47:28,767 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:47:28,768 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:47:28,769 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:47:28,769 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:47:28,770 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:47:28,770 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:47:28,771 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:47:28,772 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 04:47:28,772 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 04:47:28,773 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:47:28,773 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:47:28,773 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:47:28,774 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:47:28,774 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:47:28,775 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 04:47:28,775 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 04:47:28,776 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 04:47:28,776 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:47:28,776 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 04:47:28,776 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 04:47:28,777 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:47:28,777 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:47:28,777 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:47:28,778 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:47:28,778 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:47:28,778 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:47:28,779 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:47:28,779 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:47:28,779 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:47:28,779 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:47:28,780 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:47:28,780 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_9f5615bd-9361-45ee-abc9-684cc38a60bf/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5615bd-9361-45ee-abc9-684cc38a60bf/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d3dfcdcbd1ef266a13f83c8ffcd1431cdbd44aa9b3fb0ca280daf8703879343 [2023-11-19 04:47:29,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:47:29,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:47:29,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:47:29,152 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:47:29,153 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:47:29,155 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5615bd-9361-45ee-abc9-684cc38a60bf/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/pthread-wmm/safe001_rmo.oepc.i [2023-11-19 04:47:32,151 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:47:32,450 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:47:32,451 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5615bd-9361-45ee-abc9-684cc38a60bf/sv-benchmarks/c/pthread-wmm/safe001_rmo.oepc.i [2023-11-19 04:47:32,481 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5615bd-9361-45ee-abc9-684cc38a60bf/bin/utaipan-verify-t7M7D8N6sZ/data/77df08f1e/ef82980fdcab4ca6a2dff6fb83f31dcd/FLAG7131da782 [2023-11-19 04:47:32,497 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5615bd-9361-45ee-abc9-684cc38a60bf/bin/utaipan-verify-t7M7D8N6sZ/data/77df08f1e/ef82980fdcab4ca6a2dff6fb83f31dcd [2023-11-19 04:47:32,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:47:32,503 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:47:32,508 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:47:32,508 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:47:32,517 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:47:32,518 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:47:32" (1/1) ... [2023-11-19 04:47:32,519 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@586b772c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:32, skipping insertion in model container [2023-11-19 04:47:32,520 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:47:32" (1/1) ... [2023-11-19 04:47:32,574 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:47:33,015 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:47:33,029 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:47:33,102 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:47:33,152 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:47:33,152 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:47:33,160 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:47:33,161 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:33 WrapperNode [2023-11-19 04:47:33,161 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:47:33,162 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:47:33,162 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:47:33,163 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:47:33,171 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:33" (1/1) ... [2023-11-19 04:47:33,214 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:33" (1/1) ... [2023-11-19 04:47:33,259 INFO L138 Inliner]: procedures = 176, calls = 83, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 175 [2023-11-19 04:47:33,260 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:47:33,261 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:47:33,261 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:47:33,261 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:47:33,273 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:33" (1/1) ... [2023-11-19 04:47:33,273 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:33" (1/1) ... [2023-11-19 04:47:33,292 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:33" (1/1) ... [2023-11-19 04:47:33,292 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:33" (1/1) ... [2023-11-19 04:47:33,311 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:33" (1/1) ... [2023-11-19 04:47:33,324 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:33" (1/1) ... [2023-11-19 04:47:33,327 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:33" (1/1) ... [2023-11-19 04:47:33,330 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:33" (1/1) ... [2023-11-19 04:47:33,344 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:47:33,346 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:47:33,346 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:47:33,346 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:47:33,347 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:33" (1/1) ... [2023-11-19 04:47:33,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:47:33,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5615bd-9361-45ee-abc9-684cc38a60bf/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:47:33,385 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5615bd-9361-45ee-abc9-684cc38a60bf/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:47:33,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5615bd-9361-45ee-abc9-684cc38a60bf/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:47:33,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:47:33,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:47:33,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 04:47:33,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:47:33,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:47:33,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:47:33,421 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-19 04:47:33,421 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-19 04:47:33,422 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-19 04:47:33,422 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-19 04:47:33,422 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-19 04:47:33,422 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-19 04:47:33,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:47:33,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 04:47:33,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:47:33,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:47:33,425 WARN L210 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 04:47:33,590 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:47:33,593 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:47:34,270 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:47:35,127 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:47:35,128 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 04:47:35,134 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:47:35 BoogieIcfgContainer [2023-11-19 04:47:35,135 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:47:35,138 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:47:35,138 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:47:35,141 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:47:35,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:47:32" (1/3) ... [2023-11-19 04:47:35,143 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d2aec26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:47:35, skipping insertion in model container [2023-11-19 04:47:35,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:33" (2/3) ... [2023-11-19 04:47:35,145 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d2aec26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:47:35, skipping insertion in model container [2023-11-19 04:47:35,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:47:35" (3/3) ... [2023-11-19 04:47:35,147 INFO L112 eAbstractionObserver]: Analyzing ICFG safe001_rmo.oepc.i [2023-11-19 04:47:35,166 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:47:35,166 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2023-11-19 04:47:35,167 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 04:47:35,358 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 04:47:35,402 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-19 04:47:35,423 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 204 places, 214 transitions, 440 flow [2023-11-19 04:47:35,428 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 204 places, 214 transitions, 440 flow [2023-11-19 04:47:35,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 214 transitions, 440 flow [2023-11-19 04:47:35,578 INFO L124 PetriNetUnfolderBase]: 20/211 cut-off events. [2023-11-19 04:47:35,578 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 04:47:35,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 211 events. 20/211 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 407 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 155. Up to 3 conditions per place. [2023-11-19 04:47:35,599 INFO L119 LiptonReduction]: Number of co-enabled transitions 13080 [2023-11-19 04:48:17,680 INFO L134 LiptonReduction]: Checked pairs total: 40479 [2023-11-19 04:48:17,681 INFO L136 LiptonReduction]: Total number of compositions: 239 [2023-11-19 04:48:17,690 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 100 places, 93 transitions, 198 flow [2023-11-19 04:48:21,476 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110248 states, 73730 states have (on average 5.944839278448393) internal successors, (438313), 110247 states have internal predecessors, (438313), 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) [2023-11-19 04:48:21,526 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:48:21,532 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;@2cc702d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:48:21,532 INFO L358 AbstractCegarLoop]: Starting to check reachability of 101 error locations. [2023-11-19 04:48:21,638 INFO L276 IsEmpty]: Start isEmpty. Operand has 110248 states, 73730 states have (on average 5.944839278448393) internal successors, (438313), 110247 states have internal predecessors, (438313), 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) [2023-11-19 04:48:21,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2023-11-19 04:48:21,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:21,645 INFO L195 NwaCegarLoop]: trace histogram [1] [2023-11-19 04:48:21,646 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-19 04:48:21,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:21,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1392, now seen corresponding path program 1 times [2023-11-19 04:48:21,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:21,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163208281] [2023-11-19 04:48:21,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:21,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:48:22,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:22,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163208281] [2023-11-19 04:48:22,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163208281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:22,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:22,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 04:48:22,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987381440] [2023-11-19 04:48:22,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:22,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 04:48:22,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:22,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 04:48:22,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:48:22,269 INFO L87 Difference]: Start difference. First operand has 110248 states, 73730 states have (on average 5.944839278448393) internal successors, (438313), 110247 states have internal predecessors, (438313), 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) [2023-11-19 04:48:22,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:22,968 INFO L93 Difference]: Finished difference Result 10106 states and 35930 transitions. [2023-11-19 04:48:22,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 04:48:22,973 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 [2023-11-19 04:48:22,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:23,134 INFO L225 Difference]: With dead ends: 10106 [2023-11-19 04:48:23,134 INFO L226 Difference]: Without dead ends: 10106 [2023-11-19 04:48:23,136 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 [2023-11-19 04:48:23,141 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:23,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:23,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10106 states. [2023-11-19 04:48:23,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10106 to 10106. [2023-11-19 04:48:23,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10106 states, 8973 states have (on average 4.004234927003232) internal successors, (35930), 10105 states have internal predecessors, (35930), 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) [2023-11-19 04:48:23,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10106 states to 10106 states and 35930 transitions. [2023-11-19 04:48:23,851 INFO L78 Accepts]: Start accepts. Automaton has 10106 states and 35930 transitions. Word has length 1 [2023-11-19 04:48:23,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:23,852 INFO L495 AbstractCegarLoop]: Abstraction has 10106 states and 35930 transitions. [2023-11-19 04:48:23,852 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) [2023-11-19 04:48:23,853 INFO L276 IsEmpty]: Start isEmpty. Operand 10106 states and 35930 transitions. [2023-11-19 04:48:23,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-19 04:48:23,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:23,853 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-19 04:48:23,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:48:23,858 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-19 04:48:23,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:23,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1372654, now seen corresponding path program 1 times [2023-11-19 04:48:23,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:23,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788007029] [2023-11-19 04:48:23,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:23,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:24,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:48:24,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:24,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788007029] [2023-11-19 04:48:24,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788007029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:24,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:24,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 04:48:24,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643408554] [2023-11-19 04:48:24,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:24,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:24,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:24,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:24,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:24,228 INFO L87 Difference]: Start difference. First operand 10106 states and 35930 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) [2023-11-19 04:48:24,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:24,612 INFO L93 Difference]: Finished difference Result 7121 states and 22556 transitions. [2023-11-19 04:48:24,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:48:24,612 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 [2023-11-19 04:48:24,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:24,693 INFO L225 Difference]: With dead ends: 7121 [2023-11-19 04:48:24,693 INFO L226 Difference]: Without dead ends: 7109 [2023-11-19 04:48:24,693 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 [2023-11-19 04:48:24,695 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:24,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 0 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:48:24,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7109 states. [2023-11-19 04:48:24,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7109 to 6161. [2023-11-19 04:48:24,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6161 states, 5830 states have (on average 3.6126929674099486) internal successors, (21062), 6160 states have internal predecessors, (21062), 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) [2023-11-19 04:48:24,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6161 states to 6161 states and 21062 transitions. [2023-11-19 04:48:24,990 INFO L78 Accepts]: Start accepts. Automaton has 6161 states and 21062 transitions. Word has length 3 [2023-11-19 04:48:24,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:24,992 INFO L495 AbstractCegarLoop]: Abstraction has 6161 states and 21062 transitions. [2023-11-19 04:48:24,992 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) [2023-11-19 04:48:24,992 INFO L276 IsEmpty]: Start isEmpty. Operand 6161 states and 21062 transitions. [2023-11-19 04:48:24,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-19 04:48:24,993 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:24,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-19 04:48:24,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:48:24,995 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-19 04:48:24,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:24,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1372655, now seen corresponding path program 1 times [2023-11-19 04:48:24,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:25,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26827098] [2023-11-19 04:48:25,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:25,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:48:25,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:25,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26827098] [2023-11-19 04:48:25,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26827098] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:25,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:25,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 04:48:25,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518191710] [2023-11-19 04:48:25,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:25,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:25,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:25,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:25,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:25,297 INFO L87 Difference]: Start difference. First operand 6161 states and 21062 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) [2023-11-19 04:48:25,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:25,455 INFO L93 Difference]: Finished difference Result 2998 states and 9365 transitions. [2023-11-19 04:48:25,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:48:25,455 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 [2023-11-19 04:48:25,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:25,471 INFO L225 Difference]: With dead ends: 2998 [2023-11-19 04:48:25,471 INFO L226 Difference]: Without dead ends: 2924 [2023-11-19 04:48:25,472 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 [2023-11-19 04:48:25,473 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:25,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:25,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2924 states. [2023-11-19 04:48:25,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2924 to 2924. [2023-11-19 04:48:25,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2924 states, 2842 states have (on average 3.20935960591133) internal successors, (9121), 2923 states have internal predecessors, (9121), 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) [2023-11-19 04:48:25,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2924 states to 2924 states and 9121 transitions. [2023-11-19 04:48:25,579 INFO L78 Accepts]: Start accepts. Automaton has 2924 states and 9121 transitions. Word has length 3 [2023-11-19 04:48:25,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:25,580 INFO L495 AbstractCegarLoop]: Abstraction has 2924 states and 9121 transitions. [2023-11-19 04:48:25,580 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) [2023-11-19 04:48:25,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2924 states and 9121 transitions. [2023-11-19 04:48:25,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 04:48:25,582 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:25,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:25,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:48:25,583 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-19 04:48:25,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:25,583 INFO L85 PathProgramCache]: Analyzing trace with hash -376131149, now seen corresponding path program 1 times [2023-11-19 04:48:25,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:25,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094438578] [2023-11-19 04:48:25,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:25,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:48:25,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:25,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094438578] [2023-11-19 04:48:25,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094438578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:25,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:25,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 04:48:25,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817391203] [2023-11-19 04:48:25,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:25,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:25,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:25,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:25,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:25,750 INFO L87 Difference]: Start difference. First operand 2924 states and 9121 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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)