./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe027_power.oepc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 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_3501b366-aeda-449b-a58a-a281862c55fe/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3501b366-aeda-449b-a58a-a281862c55fe/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3501b366-aeda-449b-a58a-a281862c55fe/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3501b366-aeda-449b-a58a-a281862c55fe/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe027_power.oepc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3501b366-aeda-449b-a58a-a281862c55fe/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3501b366-aeda-449b-a58a-a281862c55fe/bin/uautomizer-verify-uTZkv6EMXl --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a9d301fd24d7dbc3684a100e80ac453023513d8631f488025251adcc1a8646b5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:26:05,700 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:26:05,799 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3501b366-aeda-449b-a58a-a281862c55fe/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:26:05,808 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:26:05,809 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:26:05,854 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:26:05,855 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:26:05,858 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:26:05,859 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:26:05,864 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:26:05,865 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:26:05,865 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:26:05,866 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:26:05,868 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:26:05,868 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:26:05,869 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:26:05,869 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:26:05,870 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:26:05,870 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:26:05,871 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:26:05,871 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:26:05,872 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:26:05,872 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:26:05,873 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:26:05,873 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:26:05,874 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:26:05,874 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:26:05,875 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:26:05,875 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:26:05,876 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:26:05,877 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:26:05,878 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:26:05,878 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:26:05,878 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:26:05,879 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:26:05,879 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:26:05,879 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:26:05,879 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:26:05,880 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_3501b366-aeda-449b-a58a-a281862c55fe/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3501b366-aeda-449b-a58a-a281862c55fe/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9d301fd24d7dbc3684a100e80ac453023513d8631f488025251adcc1a8646b5 [2023-11-12 02:26:06,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:26:06,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:26:06,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:26:06,231 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:26:06,231 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:26:06,233 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3501b366-aeda-449b-a58a-a281862c55fe/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/pthread-wmm/safe027_power.oepc.i [2023-11-12 02:26:09,181 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:26:09,497 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:26:09,497 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3501b366-aeda-449b-a58a-a281862c55fe/sv-benchmarks/c/pthread-wmm/safe027_power.oepc.i [2023-11-12 02:26:09,516 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3501b366-aeda-449b-a58a-a281862c55fe/bin/uautomizer-verify-uTZkv6EMXl/data/ab6fc7d6f/4d9f6fbb27f448768e0e8fc6b73f0003/FLAG24d403841 [2023-11-12 02:26:09,530 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3501b366-aeda-449b-a58a-a281862c55fe/bin/uautomizer-verify-uTZkv6EMXl/data/ab6fc7d6f/4d9f6fbb27f448768e0e8fc6b73f0003 [2023-11-12 02:26:09,533 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:26:09,534 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:26:09,536 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:26:09,536 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:26:09,541 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:26:09,542 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:26:09" (1/1) ... [2023-11-12 02:26:09,543 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63d2170f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:09, skipping insertion in model container [2023-11-12 02:26:09,543 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:26:09" (1/1) ... [2023-11-12 02:26:09,599 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:26:10,061 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:26:10,079 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:26:10,188 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:26:10,236 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:26:10,237 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:26:10,245 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:26:10,245 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:10 WrapperNode [2023-11-12 02:26:10,245 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:26:10,247 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:26:10,247 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:26:10,247 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:26:10,256 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:10" (1/1) ... [2023-11-12 02:26:10,311 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:10" (1/1) ... [2023-11-12 02:26:10,347 INFO L138 Inliner]: procedures = 177, calls = 85, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 155 [2023-11-12 02:26:10,348 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:26:10,349 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:26:10,349 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:26:10,350 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:26:10,360 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:10" (1/1) ... [2023-11-12 02:26:10,360 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:10" (1/1) ... [2023-11-12 02:26:10,379 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:10" (1/1) ... [2023-11-12 02:26:10,381 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:10" (1/1) ... [2023-11-12 02:26:10,393 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:10" (1/1) ... [2023-11-12 02:26:10,414 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:10" (1/1) ... [2023-11-12 02:26:10,417 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:10" (1/1) ... [2023-11-12 02:26:10,420 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:10" (1/1) ... [2023-11-12 02:26:10,438 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:26:10,439 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:26:10,439 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:26:10,439 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:26:10,440 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:10" (1/1) ... [2023-11-12 02:26:10,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:26:10,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3501b366-aeda-449b-a58a-a281862c55fe/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:10,513 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3501b366-aeda-449b-a58a-a281862c55fe/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:26:10,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3501b366-aeda-449b-a58a-a281862c55fe/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:26:10,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:26:10,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:26:10,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:26:10,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:26:10,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:26:10,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:26:10,620 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-12 02:26:10,620 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-12 02:26:10,620 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-12 02:26:10,620 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-12 02:26:10,620 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-12 02:26:10,621 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-12 02:26:10,621 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-11-12 02:26:10,621 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-11-12 02:26:10,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:26:10,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:26:10,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:26:10,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:26:10,625 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:26:10,806 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:26:10,808 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:26:11,550 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:26:12,380 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:26:12,380 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 02:26:12,384 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:26:12 BoogieIcfgContainer [2023-11-12 02:26:12,385 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:26:12,390 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:26:12,390 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:26:12,394 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:26:12,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:26:09" (1/3) ... [2023-11-12 02:26:12,395 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d83a7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:26:12, skipping insertion in model container [2023-11-12 02:26:12,396 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:10" (2/3) ... [2023-11-12 02:26:12,398 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d83a7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:26:12, skipping insertion in model container [2023-11-12 02:26:12,398 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:26:12" (3/3) ... [2023-11-12 02:26:12,400 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_power.oepc.i [2023-11-12 02:26:12,423 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:26:12,424 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2023-11-12 02:26:12,424 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:26:12,634 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:26:12,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 203 transitions, 422 flow [2023-11-12 02:26:12,787 INFO L124 PetriNetUnfolderBase]: 3/199 cut-off events. [2023-11-12 02:26:12,788 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:26:12,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 199 events. 3/199 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 300 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 139. Up to 2 conditions per place. [2023-11-12 02:26:12,796 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 203 transitions, 422 flow [2023-11-12 02:26:12,826 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 199 transitions, 410 flow [2023-11-12 02:26:12,830 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:26:12,855 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 199 transitions, 410 flow [2023-11-12 02:26:12,861 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 199 transitions, 410 flow [2023-11-12 02:26:12,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 199 transitions, 410 flow [2023-11-12 02:26:12,964 INFO L124 PetriNetUnfolderBase]: 3/199 cut-off events. [2023-11-12 02:26:12,965 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:26:12,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 199 events. 3/199 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 300 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 139. Up to 2 conditions per place. [2023-11-12 02:26:12,976 INFO L119 LiptonReduction]: Number of co-enabled transitions 9550 [2023-11-12 02:26:29,375 WARN L293 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 268 DAG size of output: 266 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-12 02:26:37,450 INFO L134 LiptonReduction]: Checked pairs total: 38757 [2023-11-12 02:26:37,450 INFO L136 LiptonReduction]: Total number of compositions: 173 [2023-11-12 02:26:37,476 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:26:37,481 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=PETRI_NET, 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;@2ac81b15, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:26:37,489 INFO L358 AbstractCegarLoop]: Starting to check reachability of 88 error locations. [2023-11-12 02:26:37,492 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:26:37,492 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-12 02:26:37,492 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:26:37,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:37,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-12 02:26:37,494 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2023-11-12 02:26:37,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:37,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1201, now seen corresponding path program 1 times [2023-11-12 02:26:37,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:37,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043100000] [2023-11-12 02:26:37,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:37,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:37,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:37,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:37,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043100000] [2023-11-12 02:26:37,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043100000] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:37,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:37,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-12 02:26:37,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513214251] [2023-11-12 02:26:37,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:37,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:26:37,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:37,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:26:37,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:26:37,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 376 [2023-11-12 02:26:37,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 81 transitions, 174 flow. Second operand has 2 states, 2 states have (on average 152.5) internal successors, (305), 2 states have internal predecessors, (305), 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) [2023-11-12 02:26:37,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:37,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 376 [2023-11-12 02:26:37,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:51,184 INFO L124 PetriNetUnfolderBase]: 48756/64386 cut-off events. [2023-11-12 02:26:51,184 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-11-12 02:26:51,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128996 conditions, 64386 events. 48756/64386 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 3019. Compared 372090 event pairs, 48756 based on Foata normal form. 900/36563 useless extension candidates. Maximal degree in co-relation 128984. Up to 64383 conditions per place. [2023-11-12 02:26:51,628 INFO L140 encePairwiseOnDemand]: 343/376 looper letters, 46 selfloop transitions, 0 changer transitions 0/48 dead transitions. [2023-11-12 02:26:51,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 48 transitions, 200 flow [2023-11-12 02:26:51,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:26:51,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-12 02:26:51,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 383 transitions. [2023-11-12 02:26:51,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5093085106382979 [2023-11-12 02:26:51,651 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 383 transitions. [2023-11-12 02:26:51,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 383 transitions. [2023-11-12 02:26:51,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:51,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 383 transitions. [2023-11-12 02:26:51,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 191.5) internal successors, (383), 2 states have internal predecessors, (383), 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) [2023-11-12 02:26:51,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 376.0) internal successors, (1128), 3 states have internal predecessors, (1128), 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) [2023-11-12 02:26:51,668 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 376.0) internal successors, (1128), 3 states have internal predecessors, (1128), 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) [2023-11-12 02:26:51,670 INFO L175 Difference]: Start difference. First operand has 93 places, 81 transitions, 174 flow. Second operand 2 states and 383 transitions. [2023-11-12 02:26:51,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 48 transitions, 200 flow [2023-11-12 02:26:51,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 48 transitions, 196 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:26:51,683 INFO L231 Difference]: Finished difference. Result has 58 places, 48 transitions, 104 flow [2023-11-12 02:26:51,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=104, PETRI_PLACES=58, PETRI_TRANSITIONS=48} [2023-11-12 02:26:51,690 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -35 predicate places. [2023-11-12 02:26:51,690 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 48 transitions, 104 flow [2023-11-12 02:26:51,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 152.5) internal successors, (305), 2 states have internal predecessors, (305), 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) [2023-11-12 02:26:51,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:51,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:26:51,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:26:51,692 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2023-11-12 02:26:51,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:51,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1185206, now seen corresponding path program 1 times [2023-11-12 02:26:51,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:51,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732842979] [2023-11-12 02:26:51,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:51,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:52,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:52,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732842979] [2023-11-12 02:26:52,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732842979] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:52,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:52,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:26:52,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474779768] [2023-11-12 02:26:52,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:52,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:26:52,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:52,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:26:52,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:26:52,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 376 [2023-11-12 02:26:52,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 48 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 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) [2023-11-12 02:26:52,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:52,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 376 [2023-11-12 02:26:52,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:57,487 INFO L124 PetriNetUnfolderBase]: 19402/25931 cut-off events. [2023-11-12 02:26:57,488 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:26:57,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52015 conditions, 25931 events. 19402/25931 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1180. Compared 137595 event pairs, 19402 based on Foata normal form. 0/17362 useless extension candidates. Maximal degree in co-relation 52012. Up to 25927 conditions per place. [2023-11-12 02:26:57,634 INFO L140 encePairwiseOnDemand]: 368/376 looper letters, 38 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-11-12 02:26:57,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 41 transitions, 168 flow [2023-11-12 02:26:57,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:26:57,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:26:57,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2023-11-12 02:26:57,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397163120567376 [2023-11-12 02:26:57,639 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2023-11-12 02:26:57,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2023-11-12 02:26:57,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:57,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2023-11-12 02:26:57,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 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) [2023-11-12 02:26:57,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 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) [2023-11-12 02:26:57,655 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 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) [2023-11-12 02:26:57,655 INFO L175 Difference]: Start difference. First operand has 58 places, 48 transitions, 104 flow. Second operand 3 states and 496 transitions. [2023-11-12 02:26:57,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 41 transitions, 168 flow [2023-11-12 02:26:57,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 41 transitions, 168 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:26:57,659 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 92 flow [2023-11-12 02:26:57,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2023-11-12 02:26:57,661 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -40 predicate places. [2023-11-12 02:26:57,669 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 92 flow [2023-11-12 02:26:57,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 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) [2023-11-12 02:26:57,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:57,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:26:57,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:26:57,670 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2023-11-12 02:26:57,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:57,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1185205, now seen corresponding path program 1 times [2023-11-12 02:26:57,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:57,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251268366] [2023-11-12 02:26:57,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:57,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:57,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:57,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251268366] [2023-11-12 02:26:57,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251268366] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:57,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:57,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:26:57,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828854759] [2023-11-12 02:26:57,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:57,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:26:57,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:57,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:26:57,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:26:57,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 376 [2023-11-12 02:26:57,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 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) [2023-11-12 02:26:57,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:57,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 376 [2023-11-12 02:26:57,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand