./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe019_rmo.oepc.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_2cd9fb61-e737-4ef8-ab79-1522e8db5800/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9fb61-e737-4ef8-ab79-1522e8db5800/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9fb61-e737-4ef8-ab79-1522e8db5800/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9fb61-e737-4ef8-ab79-1522e8db5800/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe019_rmo.oepc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9fb61-e737-4ef8-ab79-1522e8db5800/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9fb61-e737-4ef8-ab79-1522e8db5800/bin/uautomizer-verify-WvqO1wxjHP --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 63f865703c59d821a54141355edec3427193a51b37abbaa1f96833fe96db9b5e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:25:58,891 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:25:59,013 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9fb61-e737-4ef8-ab79-1522e8db5800/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:25:59,024 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:25:59,025 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:25:59,072 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:25:59,072 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:25:59,073 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:25:59,074 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:25:59,079 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:25:59,080 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:25:59,081 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:25:59,081 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:25:59,083 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:25:59,084 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:25:59,084 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:25:59,084 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:25:59,085 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:25:59,085 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:25:59,086 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:25:59,086 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:25:59,087 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:25:59,087 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:25:59,089 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:25:59,089 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:25:59,090 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:25:59,091 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:25:59,091 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:25:59,091 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:25:59,092 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:25:59,093 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:25:59,093 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:25:59,094 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:25:59,094 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:25:59,094 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:25:59,094 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:25:59,094 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:25:59,095 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:25:59,095 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_2cd9fb61-e737-4ef8-ab79-1522e8db5800/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9fb61-e737-4ef8-ab79-1522e8db5800/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63f865703c59d821a54141355edec3427193a51b37abbaa1f96833fe96db9b5e [2023-11-06 22:25:59,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:25:59,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:25:59,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:25:59,480 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:25:59,481 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:25:59,483 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9fb61-e737-4ef8-ab79-1522e8db5800/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread-wmm/safe019_rmo.oepc.i [2023-11-06 22:26:02,698 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:26:03,103 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:26:03,107 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9fb61-e737-4ef8-ab79-1522e8db5800/sv-benchmarks/c/pthread-wmm/safe019_rmo.oepc.i [2023-11-06 22:26:03,130 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9fb61-e737-4ef8-ab79-1522e8db5800/bin/uautomizer-verify-WvqO1wxjHP/data/f31b68e61/34e455c19d984939ab620c5b92b3635d/FLAGd7af87b49 [2023-11-06 22:26:03,149 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9fb61-e737-4ef8-ab79-1522e8db5800/bin/uautomizer-verify-WvqO1wxjHP/data/f31b68e61/34e455c19d984939ab620c5b92b3635d [2023-11-06 22:26:03,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:26:03,159 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:26:03,163 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:26:03,163 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:26:03,170 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:26:03,171 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:26:03" (1/1) ... [2023-11-06 22:26:03,172 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74969352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:03, skipping insertion in model container [2023-11-06 22:26:03,172 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:26:03" (1/1) ... [2023-11-06 22:26:03,253 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:26:03,743 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:26:03,759 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:26:03,888 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:26:03,940 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:26:03,940 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:26:03,950 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:26:03,950 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:03 WrapperNode [2023-11-06 22:26:03,951 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:26:03,952 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:26:03,953 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:26:03,953 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:26:03,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:03" (1/1) ... [2023-11-06 22:26:04,004 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:03" (1/1) ... [2023-11-06 22:26:04,061 INFO L138 Inliner]: procedures = 177, calls = 86, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 187 [2023-11-06 22:26:04,062 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:26:04,063 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:26:04,063 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:26:04,063 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:26:04,073 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:03" (1/1) ... [2023-11-06 22:26:04,073 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:03" (1/1) ... [2023-11-06 22:26:04,091 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:03" (1/1) ... [2023-11-06 22:26:04,093 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:03" (1/1) ... [2023-11-06 22:26:04,114 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:03" (1/1) ... [2023-11-06 22:26:04,132 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:03" (1/1) ... [2023-11-06 22:26:04,135 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:03" (1/1) ... [2023-11-06 22:26:04,137 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:03" (1/1) ... [2023-11-06 22:26:04,142 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:26:04,143 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:26:04,143 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:26:04,143 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:26:04,144 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:03" (1/1) ... [2023-11-06 22:26:04,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:26:04,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9fb61-e737-4ef8-ab79-1522e8db5800/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:04,183 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9fb61-e737-4ef8-ab79-1522e8db5800/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:26:04,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd9fb61-e737-4ef8-ab79-1522e8db5800/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:26:04,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:26:04,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:26:04,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:26:04,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:26:04,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:26:04,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:26:04,229 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-06 22:26:04,229 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-06 22:26:04,229 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-06 22:26:04,230 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-06 22:26:04,230 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-06 22:26:04,230 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-06 22:26:04,230 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-11-06 22:26:04,230 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-11-06 22:26:04,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:26:04,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:26:04,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:26:04,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:26:04,235 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:26:04,493 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:26:04,495 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:26:05,278 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:26:06,177 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:26:06,177 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-06 22:26:06,182 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:26:06 BoogieIcfgContainer [2023-11-06 22:26:06,183 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:26:06,187 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:26:06,188 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:26:06,192 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:26:06,193 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:26:03" (1/3) ... [2023-11-06 22:26:06,194 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef1e474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:26:06, skipping insertion in model container [2023-11-06 22:26:06,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:03" (2/3) ... [2023-11-06 22:26:06,197 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef1e474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:26:06, skipping insertion in model container [2023-11-06 22:26:06,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:26:06" (3/3) ... [2023-11-06 22:26:06,200 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_rmo.oepc.i [2023-11-06 22:26:06,226 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:26:06,227 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 52 error locations. [2023-11-06 22:26:06,227 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:26:06,450 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:26:06,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 205 transitions, 426 flow [2023-11-06 22:26:06,686 INFO L124 PetriNetUnfolderBase]: 3/201 cut-off events. [2023-11-06 22:26:06,686 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:26:06,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 201 events. 3/201 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 295 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 142. Up to 2 conditions per place. [2023-11-06 22:26:06,697 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 205 transitions, 426 flow [2023-11-06 22:26:06,715 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 201 transitions, 414 flow [2023-11-06 22:26:06,719 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:26:06,749 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 201 transitions, 414 flow [2023-11-06 22:26:06,756 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 201 transitions, 414 flow [2023-11-06 22:26:06,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 201 transitions, 414 flow [2023-11-06 22:26:06,882 INFO L124 PetriNetUnfolderBase]: 3/201 cut-off events. [2023-11-06 22:26:06,885 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:26:06,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 201 events. 3/201 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 295 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 142. Up to 2 conditions per place. [2023-11-06 22:26:06,899 INFO L119 LiptonReduction]: Number of co-enabled transitions 8884 [2023-11-06 22:26:30,513 INFO L134 LiptonReduction]: Checked pairs total: 40515 [2023-11-06 22:26:30,514 INFO L136 LiptonReduction]: Total number of compositions: 177 [2023-11-06 22:26:30,532 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:26:30,540 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;@33247e50, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:26:30,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2023-11-06 22:26:30,542 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:26:30,542 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-06 22:26:30,542 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:26:30,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:30,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-06 22:26:30,544 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 22:26:30,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:30,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1120, now seen corresponding path program 1 times [2023-11-06 22:26:30,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:30,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457766356] [2023-11-06 22:26:30,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:30,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:30,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:30,718 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 22:26:30,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:30,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457766356] [2023-11-06 22:26:30,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457766356] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:30,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:30,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 22:26:30,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366542887] [2023-11-06 22:26:30,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:30,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:26:30,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:30,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:26:30,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:26:30,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 382 [2023-11-06 22:26:30,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 86 transitions, 184 flow. Second operand has 2 states, 2 states have (on average 154.5) internal successors, (309), 2 states have internal predecessors, (309), 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 22:26:30,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:30,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 382 [2023-11-06 22:26:30,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:47,658 INFO L124 PetriNetUnfolderBase]: 69742/91855 cut-off events. [2023-11-06 22:26:47,658 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-06 22:26:47,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183906 conditions, 91855 events. 69742/91855 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6172. Compared 601193 event pairs, 69742 based on Foata normal form. 0/47031 useless extension candidates. Maximal degree in co-relation 183894. Up to 91764 conditions per place. [2023-11-06 22:26:48,513 INFO L140 encePairwiseOnDemand]: 352/382 looper letters, 50 selfloop transitions, 0 changer transitions 0/54 dead transitions. [2023-11-06 22:26:48,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 54 transitions, 220 flow [2023-11-06 22:26:48,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:26:48,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:26:48,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 388 transitions. [2023-11-06 22:26:48,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078534031413613 [2023-11-06 22:26:48,543 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 388 transitions. [2023-11-06 22:26:48,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 388 transitions. [2023-11-06 22:26:48,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:48,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 388 transitions. [2023-11-06 22:26:48,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 194.0) internal successors, (388), 2 states have internal predecessors, (388), 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 22:26:48,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 382.0) internal successors, (1146), 3 states have internal predecessors, (1146), 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 22:26:48,571 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 382.0) internal successors, (1146), 3 states have internal predecessors, (1146), 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 22:26:48,573 INFO L175 Difference]: Start difference. First operand has 97 places, 86 transitions, 184 flow. Second operand 2 states and 388 transitions. [2023-11-06 22:26:48,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 54 transitions, 220 flow [2023-11-06 22:26:48,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 54 transitions, 216 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:26:48,603 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 116 flow [2023-11-06 22:26:48,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=116, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2023-11-06 22:26:48,612 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -33 predicate places. [2023-11-06 22:26:48,612 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 116 flow [2023-11-06 22:26:48,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 154.5) internal successors, (309), 2 states have internal predecessors, (309), 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 22:26:48,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:48,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:26:48,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:26:48,615 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 22:26:48,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:48,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1106569, now seen corresponding path program 1 times [2023-11-06 22:26:48,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:48,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003958344] [2023-11-06 22:26:48,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:48,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:49,096 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 22:26:49,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:49,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003958344] [2023-11-06 22:26:49,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003958344] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:49,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:49,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:26:49,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535897506] [2023-11-06 22:26:49,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:49,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:49,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:49,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:49,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:49,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 382 [2023-11-06 22:26:49,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 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 22:26:49,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:49,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 382 [2023-11-06 22:26:49,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:55,630 INFO L124 PetriNetUnfolderBase]: 23533/31408 cut-off events. [2023-11-06 22:26:55,630 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:26:55,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62947 conditions, 31408 events. 23533/31408 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1804. Compared 183518 event pairs, 23533 based on Foata normal form. 1296/21351 useless extension candidates. Maximal degree in co-relation 62944. Up to 31358 conditions per place. [2023-11-06 22:26:55,849 INFO L140 encePairwiseOnDemand]: 371/382 looper letters, 40 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-11-06 22:26:55,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 44 transitions, 178 flow [2023-11-06 22:26:55,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:55,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:26:55,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2023-11-06 22:26:55,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397905759162304 [2023-11-06 22:26:55,855 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2023-11-06 22:26:55,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2023-11-06 22:26:55,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:55,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2023-11-06 22:26:55,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 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 22:26:55,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 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 22:26:55,872 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 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 22:26:55,873 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 116 flow. Second operand 3 states and 504 transitions. [2023-11-06 22:26:55,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 44 transitions, 178 flow [2023-11-06 22:26:55,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 44 transitions, 178 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:26:55,877 INFO L231 Difference]: Finished difference. Result has 56 places, 44 transitions, 98 flow [2023-11-06 22:26:55,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=56, PETRI_TRANSITIONS=44} [2023-11-06 22:26:55,879 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -41 predicate places. [2023-11-06 22:26:55,880 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 44 transitions, 98 flow [2023-11-06 22:26:55,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 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 22:26:55,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:55,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:26:55,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:26:55,892 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 22:26:55,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:55,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1106568, now seen corresponding path program 1 times [2023-11-06 22:26:55,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:55,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886674592] [2023-11-06 22:26:55,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:55,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:56,070 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 22:26:56,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:56,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886674592] [2023-11-06 22:26:56,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886674592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:56,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:56,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:26:56,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371429413] [2023-11-06 22:26:56,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:56,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:56,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:56,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:56,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:56,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 382 [2023-11-06 22:26:56,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 98 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) [2023-11-06 22:26:56,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:56,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 382 [2023-11-06 22:26:56,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:00,219 INFO L124 PetriNetUnfolderBase]: 19270/27124 cut-off events. [2023-11-06 22:27:00,219 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:27:00,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54067 conditions, 27124 events. 19270/27124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1451. Compared 166694 event pairs, 10592 based on Foata normal form. 0/21819 useless extension candidates. Maximal degree in co-relation 54063. Up to 13806 conditions per place. [2023-11-06 22:27:00,380 INFO L140 encePairwiseOnDemand]: 361/382 looper letters, 44 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2023-11-06 22:27:00,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 232 flow [2023-11-06 22:27:00,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:27:00,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:27:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 500 transitions. [2023-11-06 22:27:00,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363001745200698 [2023-11-06 22:27:00,385 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 500 transitions. [2023-11-06 22:27:00,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 500 transitions. [2023-11-06 22:27:00,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:00,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 500 transitions. [2023-11-06 22:27:00,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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 22:27:00,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 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 22:27:00,398 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 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 22:27:00,399 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 98 flow. Second operand 3 states and 500 transitions. [2023-11-06 22:27:00,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 232 flow [2023-11-06 22:27:00,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 56 transitions, 231 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:27:00,403 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 185 flow [2023-11-06 22:27:00,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=185, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2023-11-06 22:27:00,406 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -41 predicate places. [2023-11-06 22:27:00,406 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 185 flow [2023-11-06 22:27:00,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-11-06 22:27:00,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:00,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:00,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:27:00,414 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 22:27:00,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:00,415 INFO L85 PathProgramCache]: Analyzing trace with hash 2119414025, now seen corresponding path program 1 times [2023-11-06 22:27:00,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:00,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431713976] [2023-11-06 22:27:00,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:00,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:01,055 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 22:27:01,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:01,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431713976] [2023-11-06 22:27:01,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431713976] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:27:01,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:27:01,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:27:01,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031090010] [2023-11-06 22:27:01,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:27:01,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:27:01,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:01,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:27:01,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:27:01,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 382 [2023-11-06 22:27:01,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 185 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 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 22:27:01,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:01,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 382 [2023-11-06 22:27:01,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:04,669 INFO L124 PetriNetUnfolderBase]: 17751/25509 cut-off events. [2023-11-06 22:27:04,670 INFO L125 PetriNetUnfolderBase]: For 9092/9128 co-relation queries the response was YES. [2023-11-06 22:27:04,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69506 conditions, 25509 events. 17751/25509 cut-off events. For 9092/9128 co-relation queries the response was YES. Maximal size of possible extension queue 1404. Compared 166806 event pairs, 3910 based on Foata normal form. 0/22958 useless extension candidates. Maximal degree in co-relation 69501. Up to 21042 conditions per place. [2023-11-06 22:27:04,878 INFO L140 encePairwiseOnDemand]: 379/382 looper letters, 75 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-11-06 22:27:04,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 81 transitions, 457 flow [2023-11-06 22:27:04,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:27:04,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:27:04,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2023-11-06 22:27:04,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45287958115183247 [2023-11-06 22:27:04,883 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2023-11-06 22:27:04,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2023-11-06 22:27:04,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:04,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2023-11-06 22:27:04,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 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 22:27:04,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 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 22:27:04,892 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 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 22:27:04,892 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 185 flow. Second operand 3 states and 519 transitions. [2023-11-06 22:27:04,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 81 transitions, 457 flow [2023-11-06 22:27:05,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 81 transitions, 419 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:27:05,002 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 171 flow [2023-11-06 22:27:05,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2023-11-06 22:27:05,005 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -40 predicate places. [2023-11-06 22:27:05,005 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 171 flow [2023-11-06 22:27:05,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 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 22:27:05,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:05,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:05,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:27:05,007 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 22:27:05,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:05,008 INFO L85 PathProgramCache]: Analyzing trace with hash 2119413787, now seen corresponding path program 1 times [2023-11-06 22:27:05,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:05,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622307035] [2023-11-06 22:27:05,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:05,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:05,298 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 22:27:05,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:05,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622307035] [2023-11-06 22:27:05,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622307035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:27:05,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:27:05,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:27:05,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664697096] [2023-11-06 22:27:05,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:27:05,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:27:05,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:05,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:27:05,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:27:05,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 382 [2023-11-06 22:27:05,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 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 22:27:05,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:05,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 382 [2023-11-06 22:27:05,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand