./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe009_rmo.oepc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 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_5446dd70-d10d-4f39-9cf7-c5079a168bb1/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5446dd70-d10d-4f39-9cf7-c5079a168bb1/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_5446dd70-d10d-4f39-9cf7-c5079a168bb1/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5446dd70-d10d-4f39-9cf7-c5079a168bb1/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe009_rmo.oepc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5446dd70-d10d-4f39-9cf7-c5079a168bb1/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_5446dd70-d10d-4f39-9cf7-c5079a168bb1/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 d4dfc0bbdb080812f042fcb42d1e3b37e9e0d49ae456458f71f0b25bb99756b4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:15:32,163 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:15:32,237 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5446dd70-d10d-4f39-9cf7-c5079a168bb1/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:15:32,243 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:15:32,243 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:15:32,275 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:15:32,277 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:15:32,278 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:15:32,279 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:15:32,284 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:15:32,285 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:15:32,287 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:15:32,287 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:15:32,289 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:15:32,290 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:15:32,290 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:15:32,291 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:15:32,291 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:15:32,292 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:15:32,292 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:15:32,293 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:15:32,294 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:15:32,294 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:15:32,295 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:15:32,295 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:15:32,296 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:15:32,296 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:15:32,297 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:15:32,297 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:15:32,298 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:15:32,298 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:15:32,299 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:15:32,299 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:15:32,299 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:15:32,299 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:15:32,300 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:15:32,300 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:15:32,300 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:15:32,301 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_5446dd70-d10d-4f39-9cf7-c5079a168bb1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5446dd70-d10d-4f39-9cf7-c5079a168bb1/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4dfc0bbdb080812f042fcb42d1e3b37e9e0d49ae456458f71f0b25bb99756b4 [2023-11-12 02:15:32,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:15:32,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:15:32,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:15:32,646 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:15:32,647 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:15:32,648 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5446dd70-d10d-4f39-9cf7-c5079a168bb1/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/pthread-wmm/safe009_rmo.oepc.i [2023-11-12 02:15:35,840 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:15:36,117 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:15:36,117 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5446dd70-d10d-4f39-9cf7-c5079a168bb1/sv-benchmarks/c/pthread-wmm/safe009_rmo.oepc.i [2023-11-12 02:15:36,138 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5446dd70-d10d-4f39-9cf7-c5079a168bb1/bin/uautomizer-verify-uTZkv6EMXl/data/6e5fbe722/0fe538b5eddb4f18925666742eb801b8/FLAG31addb8fc [2023-11-12 02:15:36,412 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5446dd70-d10d-4f39-9cf7-c5079a168bb1/bin/uautomizer-verify-uTZkv6EMXl/data/6e5fbe722/0fe538b5eddb4f18925666742eb801b8 [2023-11-12 02:15:36,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:15:36,416 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:15:36,435 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:15:36,436 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:15:36,442 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:15:36,444 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:15:36" (1/1) ... [2023-11-12 02:15:36,445 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@376b0d70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:36, skipping insertion in model container [2023-11-12 02:15:36,446 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:15:36" (1/1) ... [2023-11-12 02:15:36,533 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:15:37,041 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:15:37,056 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:15:37,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:15:37,227 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:15:37,227 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:15:37,236 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:15:37,236 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:37 WrapperNode [2023-11-12 02:15:37,237 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:15:37,238 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:15:37,238 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:15:37,238 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:15:37,247 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:37" (1/1) ... [2023-11-12 02:15:37,291 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:37" (1/1) ... [2023-11-12 02:15:37,322 INFO L138 Inliner]: procedures = 176, calls = 75, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 171 [2023-11-12 02:15:37,323 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:15:37,324 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:15:37,324 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:15:37,324 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:15:37,334 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:37" (1/1) ... [2023-11-12 02:15:37,334 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:37" (1/1) ... [2023-11-12 02:15:37,338 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:37" (1/1) ... [2023-11-12 02:15:37,339 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:37" (1/1) ... [2023-11-12 02:15:37,350 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:37" (1/1) ... [2023-11-12 02:15:37,353 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:37" (1/1) ... [2023-11-12 02:15:37,362 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:37" (1/1) ... [2023-11-12 02:15:37,376 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:37" (1/1) ... [2023-11-12 02:15:37,381 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:15:37,382 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:15:37,382 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:15:37,382 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:15:37,383 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:37" (1/1) ... [2023-11-12 02:15:37,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:15:37,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5446dd70-d10d-4f39-9cf7-c5079a168bb1/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:37,425 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5446dd70-d10d-4f39-9cf7-c5079a168bb1/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:15:37,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5446dd70-d10d-4f39-9cf7-c5079a168bb1/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:15:37,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:15:37,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:15:37,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:15:37,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:15:37,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:15:37,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:15:37,476 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-12 02:15:37,476 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-12 02:15:37,476 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-12 02:15:37,477 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-12 02:15:37,477 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-12 02:15:37,477 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-12 02:15:37,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:15:37,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:15:37,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:15:37,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:15:37,481 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 02:15:37,707 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:15:37,709 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:15:38,307 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:15:39,185 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:15:39,185 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 02:15:39,188 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:15:39 BoogieIcfgContainer [2023-11-12 02:15:39,188 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:15:39,191 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:15:39,192 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:15:39,195 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:15:39,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:15:36" (1/3) ... [2023-11-12 02:15:39,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13369f2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:15:39, skipping insertion in model container [2023-11-12 02:15:39,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:37" (2/3) ... [2023-11-12 02:15:39,197 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13369f2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:15:39, skipping insertion in model container [2023-11-12 02:15:39,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:15:39" (3/3) ... [2023-11-12 02:15:39,199 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_rmo.oepc.i [2023-11-12 02:15:39,224 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:15:39,224 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2023-11-12 02:15:39,225 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:15:39,363 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:15:39,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 183 transitions, 378 flow [2023-11-12 02:15:39,535 INFO L124 PetriNetUnfolderBase]: 3/180 cut-off events. [2023-11-12 02:15:39,535 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:15:39,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 180 events. 3/180 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 290 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 124. Up to 2 conditions per place. [2023-11-12 02:15:39,542 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 183 transitions, 378 flow [2023-11-12 02:15:39,550 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 187 places, 180 transitions, 369 flow [2023-11-12 02:15:39,554 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:15:39,569 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 187 places, 180 transitions, 369 flow [2023-11-12 02:15:39,573 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 187 places, 180 transitions, 369 flow [2023-11-12 02:15:39,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 180 transitions, 369 flow [2023-11-12 02:15:39,669 INFO L124 PetriNetUnfolderBase]: 3/180 cut-off events. [2023-11-12 02:15:39,672 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:15:39,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 180 events. 3/180 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 296 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 124. Up to 2 conditions per place. [2023-11-12 02:15:39,680 INFO L119 LiptonReduction]: Number of co-enabled transitions 7168 [2023-11-12 02:16:10,570 INFO L134 LiptonReduction]: Checked pairs total: 35748 [2023-11-12 02:16:10,570 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-11-12 02:16:10,593 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:16:10,603 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;@4751ed24, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:16:10,604 INFO L358 AbstractCegarLoop]: Starting to check reachability of 77 error locations. [2023-11-12 02:16:10,606 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:16:10,606 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-12 02:16:10,606 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:16:10,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:10,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-12 02:16:10,608 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-12 02:16:10,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:10,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1095, now seen corresponding path program 1 times [2023-11-12 02:16:10,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:10,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126617709] [2023-11-12 02:16:10,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:10,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:10,761 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 02:16:10,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:10,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126617709] [2023-11-12 02:16:10,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126617709] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:10,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:10,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-12 02:16:10,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166552829] [2023-11-12 02:16:10,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:10,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:16:10,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:10,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:16:10,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:16:10,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 341 [2023-11-12 02:16:10,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 78 transitions, 165 flow. Second operand has 2 states, 2 states have (on average 133.5) internal successors, (267), 2 states have internal predecessors, (267), 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 02:16:10,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:10,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 341 [2023-11-12 02:16:10,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:16,404 INFO L124 PetriNetUnfolderBase]: 17257/24204 cut-off events. [2023-11-12 02:16:16,404 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-12 02:16:16,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48454 conditions, 24204 events. 17257/24204 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 2261. Compared 162922 event pairs, 17257 based on Foata normal form. 0/9890 useless extension candidates. Maximal degree in co-relation 48443. Up to 24154 conditions per place. [2023-11-12 02:16:16,605 INFO L140 encePairwiseOnDemand]: 313/341 looper letters, 43 selfloop transitions, 0 changer transitions 0/48 dead transitions. [2023-11-12 02:16:16,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 48 transitions, 191 flow [2023-11-12 02:16:16,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:16:16,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-12 02:16:16,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 337 transitions. [2023-11-12 02:16:16,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4941348973607038 [2023-11-12 02:16:16,629 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 337 transitions. [2023-11-12 02:16:16,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 337 transitions. [2023-11-12 02:16:16,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:16,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 337 transitions. [2023-11-12 02:16:16,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 168.5) internal successors, (337), 2 states have internal predecessors, (337), 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 02:16:16,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 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 02:16:16,650 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 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 02:16:16,652 INFO L175 Difference]: Start difference. First operand has 86 places, 78 transitions, 165 flow. Second operand 2 states and 337 transitions. [2023-11-12 02:16:16,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 48 transitions, 191 flow [2023-11-12 02:16:16,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 48 transitions, 188 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-12 02:16:16,662 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 102 flow [2023-11-12 02:16:16,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=55, 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=102, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-11-12 02:16:16,669 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -30 predicate places. [2023-11-12 02:16:16,669 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 102 flow [2023-11-12 02:16:16,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 133.5) internal successors, (267), 2 states have internal predecessors, (267), 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 02:16:16,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:16,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:16:16,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:16:16,671 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-12 02:16:16,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:16,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1079298, now seen corresponding path program 1 times [2023-11-12 02:16:16,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:16,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752535591] [2023-11-12 02:16:16,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:16,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:17,012 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 02:16:17,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:17,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752535591] [2023-11-12 02:16:17,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752535591] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:17,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:17,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:16:17,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273273872] [2023-11-12 02:16:17,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:17,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:16:17,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:17,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:16:17,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:16:17,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 341 [2023-11-12 02:16:17,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 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 02:16:17,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:17,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 341 [2023-11-12 02:16:17,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:20,058 INFO L124 PetriNetUnfolderBase]: 12365/18211 cut-off events. [2023-11-12 02:16:20,058 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:16:20,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36374 conditions, 18211 events. 12365/18211 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1156. Compared 118709 event pairs, 7710 based on Foata normal form. 0/9942 useless extension candidates. Maximal degree in co-relation 36371. Up to 11123 conditions per place. [2023-11-12 02:16:20,184 INFO L140 encePairwiseOnDemand]: 321/341 looper letters, 50 selfloop transitions, 10 changer transitions 0/63 dead transitions. [2023-11-12 02:16:20,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 63 transitions, 252 flow [2023-11-12 02:16:20,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:16:20,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:16:20,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 445 transitions. [2023-11-12 02:16:20,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43499511241446726 [2023-11-12 02:16:20,188 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 445 transitions. [2023-11-12 02:16:20,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 445 transitions. [2023-11-12 02:16:20,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:20,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 445 transitions. [2023-11-12 02:16:20,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 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 02:16:20,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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 02:16:20,199 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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 02:16:20,202 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 102 flow. Second operand 3 states and 445 transitions. [2023-11-12 02:16:20,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 63 transitions, 252 flow [2023-11-12 02:16:20,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 63 transitions, 252 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:16:20,207 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 182 flow [2023-11-12 02:16:20,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2023-11-12 02:16:20,208 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -29 predicate places. [2023-11-12 02:16:20,209 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 182 flow [2023-11-12 02:16:20,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 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 02:16:20,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:20,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:16:20,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:16:20,218 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-12 02:16:20,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:20,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1079299, now seen corresponding path program 1 times [2023-11-12 02:16:20,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:20,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274723191] [2023-11-12 02:16:20,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:20,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:20,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:20,445 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 02:16:20,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:20,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274723191] [2023-11-12 02:16:20,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274723191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:20,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:20,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:16:20,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153226428] [2023-11-12 02:16:20,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:20,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:16:20,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:20,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:16:20,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:16:20,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 341 [2023-11-12 02:16:20,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 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 02:16:20,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:20,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 341 [2023-11-12 02:16:20,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:21,902 INFO L124 PetriNetUnfolderBase]: 3773/5944 cut-off events. [2023-11-12 02:16:21,902 INFO L125 PetriNetUnfolderBase]: For 1857/1875 co-relation queries the response was YES. [2023-11-12 02:16:21,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16819 conditions, 5944 events. 3773/5944 cut-off events. For 1857/1875 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 37372 event pairs, 2685 based on Foata normal form. 1715/6803 useless extension candidates. Maximal degree in co-relation 16814. Up to 5563 conditions per place. [2023-11-12 02:16:21,942 INFO L140 encePairwiseOnDemand]: 330/341 looper letters, 37 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-11-12 02:16:21,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 238 flow [2023-11-12 02:16:21,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:16:21,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:16:21,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-11-12 02:16:21,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42130987292277616 [2023-11-12 02:16:21,946 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-11-12 02:16:21,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-11-12 02:16:21,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:21,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-11-12 02:16:21,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 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 02:16:21,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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 02:16:21,952 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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 02:16:21,952 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 182 flow. Second operand 3 states and 431 transitions. [2023-11-12 02:16:21,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 238 flow [2023-11-12 02:16:21,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 43 transitions, 218 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:16:21,974 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 144 flow [2023-11-12 02:16:21,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-11-12 02:16:21,975 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -39 predicate places. [2023-11-12 02:16:21,975 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 144 flow [2023-11-12 02:16:21,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 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 02:16:21,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:21,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:21,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:16:21,977 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-12 02:16:21,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:21,977 INFO L85 PathProgramCache]: Analyzing trace with hash -943625228, now seen corresponding path program 1 times [2023-11-12 02:16:21,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:21,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984466034] [2023-11-12 02:16:21,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:21,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:22,466 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 02:16:22,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:22,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984466034] [2023-11-12 02:16:22,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984466034] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:22,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:22,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:16:22,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102988924] [2023-11-12 02:16:22,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:22,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:16:22,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:22,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:16:22,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:16:22,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 341 [2023-11-12 02:16:22,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 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 02:16:22,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:22,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 341 [2023-11-12 02:16:22,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:23,478 INFO L124 PetriNetUnfolderBase]: 3663/5811 cut-off events. [2023-11-12 02:16:23,478 INFO L125 PetriNetUnfolderBase]: For 969/981 co-relation queries the response was YES. [2023-11-12 02:16:23,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15234 conditions, 5811 events. 3663/5811 cut-off events. For 969/981 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 37892 event pairs, 865 based on Foata normal form. 0/4316 useless extension candidates. Maximal degree in co-relation 15229. Up to 4756 conditions per place. [2023-11-12 02:16:23,514 INFO L140 encePairwiseOnDemand]: 338/341 looper letters, 62 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-11-12 02:16:23,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 69 transitions, 360 flow [2023-11-12 02:16:23,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:16:23,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:16:23,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 445 transitions. [2023-11-12 02:16:23,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43499511241446726 [2023-11-12 02:16:23,518 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 445 transitions. [2023-11-12 02:16:23,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 445 transitions. [2023-11-12 02:16:23,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:23,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 445 transitions. [2023-11-12 02:16:23,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 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 02:16:23,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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 02:16:23,524 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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 02:16:23,524 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 144 flow. Second operand 3 states and 445 transitions. [2023-11-12 02:16:23,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 69 transitions, 360 flow [2023-11-12 02:16:23,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 359 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:16:23,528 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 151 flow [2023-11-12 02:16:23,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-11-12 02:16:23,529 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -37 predicate places. [2023-11-12 02:16:23,529 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 151 flow [2023-11-12 02:16:23,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 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 02:16:23,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:23,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:23,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:16:23,531 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-12 02:16:23,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:23,531 INFO L85 PathProgramCache]: Analyzing trace with hash -943625434, now seen corresponding path program 1 times [2023-11-12 02:16:23,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:23,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700208133] [2023-11-12 02:16:23,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:23,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:23,693 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 02:16:23,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:23,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700208133] [2023-11-12 02:16:23,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700208133] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:23,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:23,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:16:23,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84131293] [2023-11-12 02:16:23,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:23,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:16:23,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:23,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:16:23,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:16:23,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 341 [2023-11-12 02:16:23,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 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 02:16:23,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:23,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 341 [2023-11-12 02:16:23,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:24,696 INFO L124 PetriNetUnfolderBase]: 3673/5808 cut-off events. [2023-11-12 02:16:24,696 INFO L125 PetriNetUnfolderBase]: For 1038/1076 co-relation queries the response was YES. [2023-11-12 02:16:24,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15748 conditions, 5808 events. 3673/5808 cut-off events. For 1038/1076 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 36683 event pairs, 1890 based on Foata normal form. 0/4332 useless extension candidates. Maximal degree in co-relation 15742. Up to 3453 conditions per place. [2023-11-12 02:16:24,747 INFO L140 encePairwiseOnDemand]: 337/341 looper letters, 65 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2023-11-12 02:16:24,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 73 transitions, 392 flow [2023-11-12 02:16:24,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:16:24,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:16:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 453 transitions. [2023-11-12 02:16:24,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44281524926686217 [2023-11-12 02:16:24,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 453 transitions. [2023-11-12 02:16:24,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 453 transitions. [2023-11-12 02:16:24,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:24,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 453 transitions. [2023-11-12 02:16:24,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 02:16:24,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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 02:16:24,773 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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 02:16:24,773 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 151 flow. Second operand 3 states and 453 transitions. [2023-11-12 02:16:24,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 73 transitions, 392 flow [2023-11-12 02:16:24,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 386 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:16:24,780 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 160 flow [2023-11-12 02:16:24,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-11-12 02:16:24,784 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -36 predicate places. [2023-11-12 02:16:24,784 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 160 flow [2023-11-12 02:16:24,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 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 02:16:24,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:24,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:24,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:16:24,786 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-12 02:16:24,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:24,787 INFO L85 PathProgramCache]: Analyzing trace with hash 874311753, now seen corresponding path program 1 times [2023-11-12 02:16:24,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:24,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697386651] [2023-11-12 02:16:24,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:24,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:25,173 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 02:16:25,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:25,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697386651] [2023-11-12 02:16:25,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697386651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:25,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:25,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:16:25,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148263595] [2023-11-12 02:16:25,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:25,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:16:25,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:25,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:16:25,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:16:25,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 341 [2023-11-12 02:16:25,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 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 02:16:25,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:25,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 341 [2023-11-12 02:16:25,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:26,667 INFO L124 PetriNetUnfolderBase]: 3980/6497 cut-off events. [2023-11-12 02:16:26,667 INFO L125 PetriNetUnfolderBase]: For 1520/1558 co-relation queries the response was YES. [2023-11-12 02:16:26,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18182 conditions, 6497 events. 3980/6497 cut-off events. For 1520/1558 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 44396 event pairs, 1718 based on Foata normal form. 0/5362 useless extension candidates. Maximal degree in co-relation 18175. Up to 4309 conditions per place. [2023-11-12 02:16:26,696 INFO L140 encePairwiseOnDemand]: 335/341 looper letters, 52 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2023-11-12 02:16:26,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 62 transitions, 333 flow [2023-11-12 02:16:26,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:16:26,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:16:26,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 430 transitions. [2023-11-12 02:16:26,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4203323558162268 [2023-11-12 02:16:26,698 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 430 transitions. [2023-11-12 02:16:26,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 430 transitions. [2023-11-12 02:16:26,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:26,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 430 transitions. [2023-11-12 02:16:26,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 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 02:16:26,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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 02:16:26,705 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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 02:16:26,705 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 160 flow. Second operand 3 states and 430 transitions. [2023-11-12 02:16:26,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 62 transitions, 333 flow [2023-11-12 02:16:26,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 327 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:16:26,709 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 192 flow [2023-11-12 02:16:26,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-11-12 02:16:26,710 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -36 predicate places. [2023-11-12 02:16:26,710 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 192 flow [2023-11-12 02:16:26,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 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 02:16:26,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:26,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:26,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:16:26,711 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-12 02:16:26,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:26,712 INFO L85 PathProgramCache]: Analyzing trace with hash 790600218, now seen corresponding path program 1 times [2023-11-12 02:16:26,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:26,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062472677] [2023-11-12 02:16:26,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:26,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:27,228 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 02:16:27,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:27,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062472677] [2023-11-12 02:16:27,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062472677] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:27,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:27,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:16:27,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522855633] [2023-11-12 02:16:27,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:27,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:16:27,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:27,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:16:27,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:16:27,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 341 [2023-11-12 02:16:27,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 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 02:16:27,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:27,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 341 [2023-11-12 02:16:27,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:28,631 INFO L124 PetriNetUnfolderBase]: 5568/9031 cut-off events. [2023-11-12 02:16:28,631 INFO L125 PetriNetUnfolderBase]: For 3910/3954 co-relation queries the response was YES. [2023-11-12 02:16:28,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26180 conditions, 9031 events. 5568/9031 cut-off events. For 3910/3954 co-relation queries the response was YES. Maximal size of possible extension queue 781. Compared 64796 event pairs, 2658 based on Foata normal form. 40/7270 useless extension candidates. Maximal degree in co-relation 26172. Up to 4495 conditions per place. [2023-11-12 02:16:28,691 INFO L140 encePairwiseOnDemand]: 336/341 looper letters, 67 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2023-11-12 02:16:28,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 77 transitions, 450 flow [2023-11-12 02:16:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:16:28,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:16:28,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 568 transitions. [2023-11-12 02:16:28,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41642228739002934 [2023-11-12 02:16:28,694 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 568 transitions. [2023-11-12 02:16:28,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 568 transitions. [2023-11-12 02:16:28,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:28,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 568 transitions. [2023-11-12 02:16:28,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 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 02:16:28,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 341.0) internal successors, (1705), 5 states have internal predecessors, (1705), 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 02:16:28,702 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 341.0) internal successors, (1705), 5 states have internal predecessors, (1705), 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 02:16:28,702 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 192 flow. Second operand 4 states and 568 transitions. [2023-11-12 02:16:28,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 77 transitions, 450 flow [2023-11-12 02:16:28,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 77 transitions, 443 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:16:28,724 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 210 flow [2023-11-12 02:16:28,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=210, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2023-11-12 02:16:28,725 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -33 predicate places. [2023-11-12 02:16:28,726 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 210 flow [2023-11-12 02:16:28,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 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 02:16:28,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:28,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:28,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:16:28,727 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-12 02:16:28,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:28,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1654826562, now seen corresponding path program 2 times [2023-11-12 02:16:28,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:28,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122074010] [2023-11-12 02:16:28,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:28,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat