./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe009_rmo.opt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b 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_48dc46bc-63a6-4cd6-b864-5db6d423554c/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dc46bc-63a6-4cd6-b864-5db6d423554c/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_48dc46bc-63a6-4cd6-b864-5db6d423554c/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dc46bc-63a6-4cd6-b864-5db6d423554c/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe009_rmo.opt.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dc46bc-63a6-4cd6-b864-5db6d423554c/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_48dc46bc-63a6-4cd6-b864-5db6d423554c/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 9047d35108a9c07c04b519cba211a741bb80887623b2a85c45105c17ca835121 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:33:41,214 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:33:41,310 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dc46bc-63a6-4cd6-b864-5db6d423554c/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 20:33:41,315 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:33:41,316 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:33:41,342 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:33:41,342 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:33:41,343 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:33:41,344 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:33:41,345 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:33:41,345 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:33:41,346 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:33:41,346 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:33:41,347 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:33:41,348 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:33:41,348 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:33:41,349 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:33:41,349 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:33:41,350 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:33:41,351 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:33:41,351 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:33:41,352 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:33:41,353 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 20:33:41,354 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 20:33:41,354 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:33:41,355 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:33:41,355 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:33:41,356 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:33:41,357 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:33:41,357 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 20:33:41,358 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 20:33:41,358 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 20:33:41,358 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:33:41,359 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 20:33:41,369 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 20:33:41,370 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:33:41,370 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:33:41,371 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:33:41,371 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:33:41,372 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:33:41,372 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:33:41,373 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:33:41,373 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:33:41,373 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:33:41,374 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:33:41,374 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:33:41,374 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_48dc46bc-63a6-4cd6-b864-5db6d423554c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dc46bc-63a6-4cd6-b864-5db6d423554c/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9047d35108a9c07c04b519cba211a741bb80887623b2a85c45105c17ca835121 [2023-11-06 20:33:41,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:33:41,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:33:41,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:33:41,681 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:33:41,683 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:33:41,684 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dc46bc-63a6-4cd6-b864-5db6d423554c/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/pthread-wmm/safe009_rmo.opt.i [2023-11-06 20:33:44,805 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:33:45,183 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:33:45,184 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dc46bc-63a6-4cd6-b864-5db6d423554c/sv-benchmarks/c/pthread-wmm/safe009_rmo.opt.i [2023-11-06 20:33:45,216 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dc46bc-63a6-4cd6-b864-5db6d423554c/bin/utaipan-verify-FOvIYxoinp/data/12c737376/1b6238f1cb9d4c71a5f60a784f1a6909/FLAGa5694a443 [2023-11-06 20:33:45,235 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dc46bc-63a6-4cd6-b864-5db6d423554c/bin/utaipan-verify-FOvIYxoinp/data/12c737376/1b6238f1cb9d4c71a5f60a784f1a6909 [2023-11-06 20:33:45,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:33:45,244 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:33:45,248 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:33:45,248 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:33:45,254 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:33:45,255 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:33:45" (1/1) ... [2023-11-06 20:33:45,256 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cf2f669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:45, skipping insertion in model container [2023-11-06 20:33:45,257 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:33:45" (1/1) ... [2023-11-06 20:33:45,333 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:33:45,890 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:33:45,912 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:33:46,000 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:33:46,037 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 20:33:46,037 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 20:33:46,045 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:33:46,046 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:46 WrapperNode [2023-11-06 20:33:46,046 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:33:46,048 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:33:46,048 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:33:46,048 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:33:46,057 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:46" (1/1) ... [2023-11-06 20:33:46,075 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:46" (1/1) ... [2023-11-06 20:33:46,105 INFO L138 Inliner]: procedures = 176, calls = 70, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 138 [2023-11-06 20:33:46,105 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:33:46,106 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:33:46,106 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:33:46,107 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:33:46,117 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:46" (1/1) ... [2023-11-06 20:33:46,118 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:46" (1/1) ... [2023-11-06 20:33:46,122 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:46" (1/1) ... [2023-11-06 20:33:46,122 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:46" (1/1) ... [2023-11-06 20:33:46,136 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:46" (1/1) ... [2023-11-06 20:33:46,139 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:46" (1/1) ... [2023-11-06 20:33:46,143 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:46" (1/1) ... [2023-11-06 20:33:46,145 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:46" (1/1) ... [2023-11-06 20:33:46,150 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:33:46,151 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:33:46,151 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:33:46,152 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:33:46,153 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:46" (1/1) ... [2023-11-06 20:33:46,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:33:46,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dc46bc-63a6-4cd6-b864-5db6d423554c/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:33:46,239 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dc46bc-63a6-4cd6-b864-5db6d423554c/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:33:46,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dc46bc-63a6-4cd6-b864-5db6d423554c/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:33:46,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 20:33:46,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 20:33:46,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 20:33:46,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:33:46,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 20:33:46,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:33:46,325 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-06 20:33:46,325 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-06 20:33:46,326 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-06 20:33:46,326 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-06 20:33:46,326 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-06 20:33:46,326 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-06 20:33:46,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 20:33:46,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 20:33:46,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:33:46,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:33:46,329 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 20:33:46,562 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:33:46,564 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:33:47,160 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:33:47,701 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:33:47,701 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-06 20:33:47,704 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:33:47 BoogieIcfgContainer [2023-11-06 20:33:47,705 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:33:47,709 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:33:47,709 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:33:47,712 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:33:47,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:33:45" (1/3) ... [2023-11-06 20:33:47,714 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@534fe639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:33:47, skipping insertion in model container [2023-11-06 20:33:47,714 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:46" (2/3) ... [2023-11-06 20:33:47,716 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@534fe639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:33:47, skipping insertion in model container [2023-11-06 20:33:47,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:33:47" (3/3) ... [2023-11-06 20:33:47,718 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_rmo.opt.i [2023-11-06 20:33:47,739 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:33:47,740 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 40 error locations. [2023-11-06 20:33:47,740 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 20:33:47,889 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 20:33:47,940 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-06 20:33:47,961 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 174 transitions, 360 flow [2023-11-06 20:33:47,967 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 174 transitions, 360 flow [2023-11-06 20:33:47,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 174 transitions, 360 flow [2023-11-06 20:33:48,109 INFO L124 PetriNetUnfolderBase]: 3/171 cut-off events. [2023-11-06 20:33:48,111 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 20:33:48,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 171 events. 3/171 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 227 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2023-11-06 20:33:48,126 INFO L119 LiptonReduction]: Number of co-enabled transitions 6524 [2023-11-06 20:34:06,252 INFO L134 LiptonReduction]: Checked pairs total: 29503 [2023-11-06 20:34:06,253 INFO L136 LiptonReduction]: Total number of compositions: 159 [2023-11-06 20:34:06,262 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 78 places, 69 transitions, 150 flow [2023-11-06 20:34:07,622 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 28926 states, 23318 states have (on average 4.586885667724505) internal successors, (106957), 28925 states have internal predecessors, (106957), 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 20:34:07,650 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:34:07,660 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;@7ea77994, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:34:07,660 INFO L358 AbstractCegarLoop]: Starting to check reachability of 69 error locations. [2023-11-06 20:34:07,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 28926 states, 23318 states have (on average 4.586885667724505) internal successors, (106957), 28925 states have internal predecessors, (106957), 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 20:34:07,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2023-11-06 20:34:07,719 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:34:07,719 INFO L195 NwaCegarLoop]: trace histogram [1] [2023-11-06 20:34:07,720 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2023-11-06 20:34:07,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:34:07,725 INFO L85 PathProgramCache]: Analyzing trace with hash 970, now seen corresponding path program 1 times [2023-11-06 20:34:07,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:34:07,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852813103] [2023-11-06 20:34:07,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:34:07,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:34:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:34:07,890 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 20:34:07,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:34:07,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852813103] [2023-11-06 20:34:07,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852813103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:34:07,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:34:07,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 20:34:07,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110188032] [2023-11-06 20:34:07,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:34:07,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 20:34:07,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:34:07,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 20:34:07,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 20:34:07,983 INFO L87 Difference]: Start difference. First operand has 28926 states, 23318 states have (on average 4.586885667724505) internal successors, (106957), 28925 states have internal predecessors, (106957), 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 20:34:08,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:34:08,704 INFO L93 Difference]: Finished difference Result 14910 states and 53713 transitions. [2023-11-06 20:34:08,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 20:34:08,707 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 20:34:08,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:34:08,914 INFO L225 Difference]: With dead ends: 14910 [2023-11-06 20:34:08,915 INFO L226 Difference]: Without dead ends: 14910 [2023-11-06 20:34:08,916 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 20:34:08,919 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:34:08,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:34:09,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14910 states. [2023-11-06 20:34:09,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14910 to 14910. [2023-11-06 20:34:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14910 states, 12706 states have (on average 4.22737289469542) internal successors, (53713), 14909 states have internal predecessors, (53713), 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 20:34:09,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14910 states to 14910 states and 53713 transitions. [2023-11-06 20:34:09,968 INFO L78 Accepts]: Start accepts. Automaton has 14910 states and 53713 transitions. Word has length 1 [2023-11-06 20:34:09,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:34:09,969 INFO L495 AbstractCegarLoop]: Abstraction has 14910 states and 53713 transitions. [2023-11-06 20:34:09,969 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 20:34:09,969 INFO L276 IsEmpty]: Start isEmpty. Operand 14910 states and 53713 transitions. [2023-11-06 20:34:09,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-06 20:34:09,970 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:34:09,970 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-06 20:34:09,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:34:09,970 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2023-11-06 20:34:09,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:34:09,971 INFO L85 PathProgramCache]: Analyzing trace with hash 29735066, now seen corresponding path program 1 times [2023-11-06 20:34:09,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:34:09,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131466150] [2023-11-06 20:34:09,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:34:09,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:34:10,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:34:10,510 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 20:34:10,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:34:10,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131466150] [2023-11-06 20:34:10,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131466150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:34:10,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:34:10,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:34:10,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940909814] [2023-11-06 20:34:10,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:34:10,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:34:10,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:34:10,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:34:10,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:34:10,515 INFO L87 Difference]: Start difference. First operand 14910 states and 53713 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:34:10,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:34:10,891 INFO L93 Difference]: Finished difference Result 10682 states and 34811 transitions. [2023-11-06 20:34:10,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:34:10,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-06 20:34:10,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:34:10,985 INFO L225 Difference]: With dead ends: 10682 [2023-11-06 20:34:10,985 INFO L226 Difference]: Without dead ends: 10678 [2023-11-06 20:34:10,986 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 20:34:10,988 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 30 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:34:10,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 3 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:34:11,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10678 states. [2023-11-06 20:34:11,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10678 to 9406. [2023-11-06 20:34:11,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9406 states, 8677 states have (on average 3.8279359225538783) internal successors, (33215), 9405 states have internal predecessors, (33215), 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 20:34:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9406 states to 9406 states and 33215 transitions. [2023-11-06 20:34:11,660 INFO L78 Accepts]: Start accepts. Automaton has 9406 states and 33215 transitions. Word has length 4 [2023-11-06 20:34:11,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:34:11,660 INFO L495 AbstractCegarLoop]: Abstraction has 9406 states and 33215 transitions. [2023-11-06 20:34:11,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:34:11,661 INFO L276 IsEmpty]: Start isEmpty. Operand 9406 states and 33215 transitions. [2023-11-06 20:34:11,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-06 20:34:11,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:34:11,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-06 20:34:11,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 20:34:11,662 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2023-11-06 20:34:11,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:34:11,662 INFO L85 PathProgramCache]: Analyzing trace with hash 29735067, now seen corresponding path program 1 times [2023-11-06 20:34:11,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:34:11,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422896678] [2023-11-06 20:34:11,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:34:11,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:34:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:34:11,774 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 20:34:11,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:34:11,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422896678] [2023-11-06 20:34:11,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422896678] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:34:11,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:34:11,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:34:11,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012131114] [2023-11-06 20:34:11,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:34:11,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:34:11,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:34:11,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:34:11,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:34:11,777 INFO L87 Difference]: Start difference. First operand 9406 states and 33215 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:34:11,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:34:11,923 INFO L93 Difference]: Finished difference Result 3204 states and 9971 transitions. [2023-11-06 20:34:11,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:34:11,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-06 20:34:11,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:34:11,943 INFO L225 Difference]: With dead ends: 3204 [2023-11-06 20:34:11,943 INFO L226 Difference]: Without dead ends: 3120 [2023-11-06 20:34:11,944 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 20:34:11,945 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:34:11,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 1 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:34:11,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2023-11-06 20:34:12,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 3120. [2023-11-06 20:34:12,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3120 states, 3022 states have (on average 3.2081403044341497) internal successors, (9695), 3119 states have internal predecessors, (9695), 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 20:34:12,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 9695 transitions. [2023-11-06 20:34:12,066 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 9695 transitions. Word has length 4 [2023-11-06 20:34:12,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:34:12,066 INFO L495 AbstractCegarLoop]: Abstraction has 3120 states and 9695 transitions. [2023-11-06 20:34:12,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:34:12,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 9695 transitions. [2023-11-06 20:34:12,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 20:34:12,148 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:34:12,149 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:34:12,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 20:34:12,149 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2023-11-06 20:34:12,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:34:12,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1635669171, now seen corresponding path program 1 times [2023-11-06 20:34:12,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:34:12,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445716026] [2023-11-06 20:34:12,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:34:12,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:34:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:34:12,309 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 20:34:12,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:34:12,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445716026] [2023-11-06 20:34:12,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445716026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:34:12,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:34:12,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:34:12,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71929784] [2023-11-06 20:34:12,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:34:12,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:34:12,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:34:12,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:34:12,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:34:12,312 INFO L87 Difference]: Start difference. First operand 3120 states and 9695 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:34:12,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:34:12,493 INFO L93 Difference]: Finished difference Result 3080 states and 9553 transitions. [2023-11-06 20:34:12,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:34:12,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 20:34:12,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:34:12,511 INFO L225 Difference]: With dead ends: 3080 [2023-11-06 20:34:12,511 INFO L226 Difference]: Without dead ends: 3080 [2023-11-06 20:34:12,512 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 20:34:12,516 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:34:12,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 7 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:34:12,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3080 states. [2023-11-06 20:34:12,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3080 to 3080. [2023-11-06 20:34:12,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3080 states, 2982 states have (on average 3.20355466130114) internal successors, (9553), 3079 states have internal predecessors, (9553), 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 20:34:12,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 9553 transitions. [2023-11-06 20:34:12,640 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 9553 transitions. Word has length 10 [2023-11-06 20:34:12,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:34:12,641 INFO L495 AbstractCegarLoop]: Abstraction has 3080 states and 9553 transitions. [2023-11-06 20:34:12,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:34:12,642 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 9553 transitions. [2023-11-06 20:34:12,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 20:34:12,645 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:34:12,645 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:34:12,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3