./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81806702-e5f9-47f8-9011-b1c70e24ba64/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81806702-e5f9-47f8-9011-b1c70e24ba64/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_81806702-e5f9-47f8-9011-b1c70e24ba64/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81806702-e5f9-47f8-9011-b1c70e24ba64/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81806702-e5f9-47f8-9011-b1c70e24ba64/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_81806702-e5f9-47f8-9011-b1c70e24ba64/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 504de2e820c504d0b98f5b71c19407f1b43c0dd9338639fad4f2fe6ea2f6854f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:15:58,038 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:15:58,115 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81806702-e5f9-47f8-9011-b1c70e24ba64/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-19 05:15:58,121 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:15:58,122 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:15:58,151 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:15:58,152 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:15:58,153 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:15:58,154 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:15:58,154 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:15:58,155 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:15:58,155 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:15:58,156 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:15:58,156 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:15:58,157 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:15:58,157 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:15:58,158 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:15:58,158 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:15:58,159 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:15:58,159 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:15:58,160 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:15:58,160 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:15:58,161 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 05:15:58,161 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 05:15:58,162 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:15:58,162 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:15:58,163 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:15:58,163 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:15:58,163 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:15:58,164 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 05:15:58,164 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 05:15:58,165 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 05:15:58,165 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:15:58,165 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 05:15:58,165 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 05:15:58,166 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:15:58,166 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:15:58,166 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:15:58,166 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:15:58,167 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:15:58,167 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:15:58,167 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:15:58,168 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:15:58,168 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:15:58,168 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:15:58,168 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:15:58,168 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_81806702-e5f9-47f8-9011-b1c70e24ba64/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81806702-e5f9-47f8-9011-b1c70e24ba64/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 504de2e820c504d0b98f5b71c19407f1b43c0dd9338639fad4f2fe6ea2f6854f [2023-11-19 05:15:58,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:15:58,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:15:58,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:15:58,457 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:15:58,459 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:15:58,460 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81806702-e5f9-47f8-9011-b1c70e24ba64/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c [2023-11-19 05:16:01,572 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:16:01,800 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:16:01,801 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81806702-e5f9-47f8-9011-b1c70e24ba64/sv-benchmarks/c/weaver/parallel-barrier.wvr.c [2023-11-19 05:16:01,810 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81806702-e5f9-47f8-9011-b1c70e24ba64/bin/utaipan-verify-t7M7D8N6sZ/data/42e906fa8/5af4d01ed653448a8fd4f0fc407485d0/FLAG97bc8dbba [2023-11-19 05:16:01,824 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81806702-e5f9-47f8-9011-b1c70e24ba64/bin/utaipan-verify-t7M7D8N6sZ/data/42e906fa8/5af4d01ed653448a8fd4f0fc407485d0 [2023-11-19 05:16:01,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:16:01,829 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:16:01,830 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:16:01,830 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:16:01,836 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:16:01,837 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:16:01" (1/1) ... [2023-11-19 05:16:01,838 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78e2779b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:16:01, skipping insertion in model container [2023-11-19 05:16:01,838 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:16:01" (1/1) ... [2023-11-19 05:16:01,869 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:16:02,063 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:16:02,075 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:16:02,107 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:16:02,116 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 05:16:02,117 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 05:16:02,131 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:16:02,132 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:16:02 WrapperNode [2023-11-19 05:16:02,132 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:16:02,133 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:16:02,133 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:16:02,133 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:16:02,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:16:02" (1/1) ... [2023-11-19 05:16:02,151 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:16:02" (1/1) ... [2023-11-19 05:16:02,189 INFO L138 Inliner]: procedures = 25, calls = 99, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 272 [2023-11-19 05:16:02,190 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:16:02,190 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:16:02,191 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:16:02,191 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:16:02,207 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:16:02" (1/1) ... [2023-11-19 05:16:02,207 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:16:02" (1/1) ... [2023-11-19 05:16:02,213 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:16:02" (1/1) ... [2023-11-19 05:16:02,213 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:16:02" (1/1) ... [2023-11-19 05:16:02,224 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:16:02" (1/1) ... [2023-11-19 05:16:02,226 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:16:02" (1/1) ... [2023-11-19 05:16:02,229 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:16:02" (1/1) ... [2023-11-19 05:16:02,231 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:16:02" (1/1) ... [2023-11-19 05:16:02,243 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:16:02,244 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:16:02,244 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:16:02,244 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:16:02,245 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:16:02" (1/1) ... [2023-11-19 05:16:02,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:16:02,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81806702-e5f9-47f8-9011-b1c70e24ba64/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:16:02,302 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81806702-e5f9-47f8-9011-b1c70e24ba64/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:16:02,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81806702-e5f9-47f8-9011-b1c70e24ba64/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:16:02,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:16:02,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:16:02,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:16:02,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:16:02,354 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 05:16:02,355 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 05:16:02,356 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 05:16:02,357 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 05:16:02,357 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 05:16:02,358 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 05:16:02,358 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-19 05:16:02,358 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-19 05:16:02,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:16:02,358 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-11-19 05:16:02,358 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-11-19 05:16:02,358 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-11-19 05:16:02,359 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-11-19 05:16:02,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 05:16:02,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 05:16:02,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:16:02,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:16:02,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:16:02,362 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 05:16:02,535 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:16:02,537 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:16:02,990 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:16:03,107 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:16:03,108 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 05:16:03,117 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:16:03 BoogieIcfgContainer [2023-11-19 05:16:03,117 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:16:03,123 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:16:03,123 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:16:03,126 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:16:03,126 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:16:01" (1/3) ... [2023-11-19 05:16:03,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45dfe407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:16:03, skipping insertion in model container [2023-11-19 05:16:03,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:16:02" (2/3) ... [2023-11-19 05:16:03,129 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45dfe407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:16:03, skipping insertion in model container [2023-11-19 05:16:03,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:16:03" (3/3) ... [2023-11-19 05:16:03,133 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-barrier.wvr.c [2023-11-19 05:16:03,153 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:16:03,153 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-19 05:16:03,154 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 05:16:03,383 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-11-19 05:16:03,435 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-19 05:16:03,474 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 295 places, 284 transitions, 634 flow [2023-11-19 05:16:03,479 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 295 places, 284 transitions, 634 flow [2023-11-19 05:16:03,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 295 places, 284 transitions, 634 flow [2023-11-19 05:16:03,645 INFO L124 PetriNetUnfolderBase]: 8/252 cut-off events. [2023-11-19 05:16:03,646 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 05:16:03,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 252 events. 8/252 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 378 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 211. Up to 3 conditions per place. [2023-11-19 05:16:03,667 INFO L119 LiptonReduction]: Number of co-enabled transitions 12024 [2023-11-19 05:16:11,111 INFO L134 LiptonReduction]: Checked pairs total: 72882 [2023-11-19 05:16:11,113 INFO L136 LiptonReduction]: Total number of compositions: 216 [2023-11-19 05:16:11,127 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 128 places, 114 transitions, 294 flow [2023-11-19 05:16:17,378 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 113233 states, 112951 states have (on average 4.956202246992058) internal successors, (559808), 113232 states have internal predecessors, (559808), 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 05:16:17,431 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:16:17,459 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;@6aac3ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:16:17,459 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-19 05:16:17,740 INFO L276 IsEmpty]: Start isEmpty. Operand has 113233 states, 112951 states have (on average 4.956202246992058) internal successors, (559808), 113232 states have internal predecessors, (559808), 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 05:16:17,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2023-11-19 05:16:17,745 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:16:17,745 INFO L195 NwaCegarLoop]: trace histogram [1] [2023-11-19 05:16:17,746 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-19 05:16:17,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:16:17,751 INFO L85 PathProgramCache]: Analyzing trace with hash 992, now seen corresponding path program 1 times [2023-11-19 05:16:17,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:16:17,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983629256] [2023-11-19 05:16:17,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:16:17,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:16:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:16:17,861 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 05:16:17,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:16:17,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983629256] [2023-11-19 05:16:17,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983629256] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:16:17,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:16:17,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 05:16:17,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944011367] [2023-11-19 05:16:17,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:16:17,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 05:16:17,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:16:17,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 05:16:17,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:16:18,103 INFO L87 Difference]: Start difference. First operand has 113233 states, 112951 states have (on average 4.956202246992058) internal successors, (559808), 113232 states have internal predecessors, (559808), 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 05:16:21,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:16:21,151 INFO L93 Difference]: Finished difference Result 113230 states and 559133 transitions. [2023-11-19 05:16:21,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 05:16:21,165 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 05:16:21,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:16:22,852 INFO L225 Difference]: With dead ends: 113230 [2023-11-19 05:16:22,853 INFO L226 Difference]: Without dead ends: 113230 [2023-11-19 05:16:22,853 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 05:16:22,857 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:16:22,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:16:23,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113230 states. [2023-11-19 05:16:29,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113230 to 113230. [2023-11-19 05:16:29,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113230 states, 112951 states have (on average 4.950226204283274) internal successors, (559133), 113229 states have internal predecessors, (559133), 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 05:16:30,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113230 states to 113230 states and 559133 transitions. [2023-11-19 05:16:30,902 INFO L78 Accepts]: Start accepts. Automaton has 113230 states and 559133 transitions. Word has length 1 [2023-11-19 05:16:30,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:16:30,902 INFO L495 AbstractCegarLoop]: Abstraction has 113230 states and 559133 transitions. [2023-11-19 05:16:30,904 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 05:16:30,905 INFO L276 IsEmpty]: Start isEmpty. Operand 113230 states and 559133 transitions. [2023-11-19 05:16:30,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-19 05:16:30,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:16:30,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 05:16:30,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:16:30,907 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-19 05:16:30,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:16:30,907 INFO L85 PathProgramCache]: Analyzing trace with hash 937356987, now seen corresponding path program 1 times [2023-11-19 05:16:30,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:16:30,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895390594] [2023-11-19 05:16:30,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:16:30,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:16:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:16:31,084 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 05:16:31,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:16:31,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895390594] [2023-11-19 05:16:31,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895390594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:16:31,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:16:31,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 05:16:31,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408726035] [2023-11-19 05:16:31,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:16:31,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:16:31,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:16:31,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:16:31,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:16:31,876 INFO L87 Difference]: Start difference. First operand 113230 states and 559133 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:16:34,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:16:34,127 INFO L93 Difference]: Finished difference Result 114721 states and 564278 transitions. [2023-11-19 05:16:34,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:16:34,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-19 05:16:34,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:16:34,978 INFO L225 Difference]: With dead ends: 114721 [2023-11-19 05:16:34,979 INFO L226 Difference]: Without dead ends: 114721 [2023-11-19 05:16:34,979 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 05:16:34,981 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 74 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:16:34,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 31 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:16:35,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114721 states. [2023-11-19 05:16:40,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114721 to 113561. [2023-11-19 05:16:41,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113561 states, 113290 states have (on average 4.948901050401624) internal successors, (560661), 113560 states have internal predecessors, (560661), 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 05:16:42,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113561 states to 113561 states and 560661 transitions. [2023-11-19 05:16:42,783 INFO L78 Accepts]: Start accepts. Automaton has 113561 states and 560661 transitions. Word has length 5 [2023-11-19 05:16:42,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:16:42,784 INFO L495 AbstractCegarLoop]: Abstraction has 113561 states and 560661 transitions. [2023-11-19 05:16:42,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:16:42,785 INFO L276 IsEmpty]: Start isEmpty. Operand 113561 states and 560661 transitions. [2023-11-19 05:16:42,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-19 05:16:42,786 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:16:42,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 05:16:42,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:16:42,787 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-19 05:16:42,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:16:42,788 INFO L85 PathProgramCache]: Analyzing trace with hash 937356988, now seen corresponding path program 1 times [2023-11-19 05:16:42,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:16:42,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122185797] [2023-11-19 05:16:42,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:16:42,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:16:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:16:43,032 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 05:16:43,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:16:43,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122185797] [2023-11-19 05:16:43,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122185797] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:16:43,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:16:43,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 05:16:43,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696598854] [2023-11-19 05:16:43,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:16:43,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:16:43,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:16:43,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:16:43,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:16:43,037 INFO L87 Difference]: Start difference. First operand 113561 states and 560661 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)