./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/rfi006_rmo.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ff92beb-938f-46ea-a40f-963dc3d74d6c/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ff92beb-938f-46ea-a40f-963dc3d74d6c/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ff92beb-938f-46ea-a40f-963dc3d74d6c/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ff92beb-938f-46ea-a40f-963dc3d74d6c/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/rfi006_rmo.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ff92beb-938f-46ea-a40f-963dc3d74d6c/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ff92beb-938f-46ea-a40f-963dc3d74d6c/bin/uautomizer-verify-VRDe98Ueme --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 304137b4cdfcb1cb721c511de7faa38271d71a9e3815c7f79977f44461721381 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:49:55,136 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:49:55,218 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ff92beb-938f-46ea-a40f-963dc3d74d6c/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 11:49:55,225 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:49:55,226 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:49:55,259 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:49:55,260 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:49:55,261 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:49:55,262 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:49:55,263 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:49:55,264 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:49:55,264 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:49:55,266 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:49:55,266 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:49:55,267 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:49:55,268 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:49:55,269 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:49:55,270 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:49:55,271 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:49:55,271 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:49:55,272 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:49:55,273 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:49:55,274 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:49:55,274 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:49:55,275 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:49:55,276 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:49:55,277 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:49:55,277 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:49:55,278 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:49:55,279 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:49:55,280 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:49:55,280 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:49:55,281 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:49:55,282 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:49:55,283 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:49:55,283 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:49:55,284 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:49:55,285 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:49:55,286 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:49:55,286 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:49:55,287 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:49:55,288 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_3ff92beb-938f-46ea-a40f-963dc3d74d6c/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ff92beb-938f-46ea-a40f-963dc3d74d6c/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 304137b4cdfcb1cb721c511de7faa38271d71a9e3815c7f79977f44461721381 [2023-11-26 11:49:55,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:49:55,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:49:55,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:49:55,692 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:49:55,692 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:49:55,694 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ff92beb-938f-46ea-a40f-963dc3d74d6c/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/pthread-wmm/rfi006_rmo.i [2023-11-26 11:49:58,901 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:49:59,297 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:49:59,298 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ff92beb-938f-46ea-a40f-963dc3d74d6c/sv-benchmarks/c/pthread-wmm/rfi006_rmo.i [2023-11-26 11:49:59,317 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ff92beb-938f-46ea-a40f-963dc3d74d6c/bin/uautomizer-verify-VRDe98Ueme/data/ab7b788ec/915a38a82ca34d84b74edad8d1e2fef9/FLAGaba817b5a [2023-11-26 11:49:59,335 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ff92beb-938f-46ea-a40f-963dc3d74d6c/bin/uautomizer-verify-VRDe98Ueme/data/ab7b788ec/915a38a82ca34d84b74edad8d1e2fef9 [2023-11-26 11:49:59,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:49:59,340 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:49:59,342 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:49:59,342 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:49:59,349 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:49:59,350 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:49:59" (1/1) ... [2023-11-26 11:49:59,351 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70ecff5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:59, skipping insertion in model container [2023-11-26 11:49:59,352 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:49:59" (1/1) ... [2023-11-26 11:49:59,437 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:49:59,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:49:59,931 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:50:00,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:50:00,051 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:50:00,052 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:50:00,061 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:50:00,062 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:00 WrapperNode [2023-11-26 11:50:00,062 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:50:00,064 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:50:00,064 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:50:00,064 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:50:00,074 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:00" (1/1) ... [2023-11-26 11:50:00,095 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:00" (1/1) ... [2023-11-26 11:50:00,132 INFO L138 Inliner]: procedures = 176, calls = 74, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 139 [2023-11-26 11:50:00,132 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:50:00,133 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:50:00,134 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:50:00,134 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:50:00,149 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:00" (1/1) ... [2023-11-26 11:50:00,149 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:00" (1/1) ... [2023-11-26 11:50:00,155 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:00" (1/1) ... [2023-11-26 11:50:00,180 INFO L175 MemorySlicer]: Split 24 memory accesses to 5 slices as follows [2, 1, 1, 19, 1]. 79 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 0, 1, 0]. The 10 writes are split as follows [0, 1, 1, 7, 1]. [2023-11-26 11:50:00,181 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:00" (1/1) ... [2023-11-26 11:50:00,181 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:00" (1/1) ... [2023-11-26 11:50:00,203 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:00" (1/1) ... [2023-11-26 11:50:00,206 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:00" (1/1) ... [2023-11-26 11:50:00,211 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:00" (1/1) ... [2023-11-26 11:50:00,214 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:00" (1/1) ... [2023-11-26 11:50:00,221 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:50:00,222 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:50:00,222 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:50:00,222 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:50:00,223 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:00" (1/1) ... [2023-11-26 11:50:00,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:50:00,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ff92beb-938f-46ea-a40f-963dc3d74d6c/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:00,267 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ff92beb-938f-46ea-a40f-963dc3d74d6c/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:50:00,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ff92beb-938f-46ea-a40f-963dc3d74d6c/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:50:00,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:50:00,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:50:00,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:50:00,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:50:00,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 11:50:00,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:50:00,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:50:00,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:50:00,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:50:00,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 11:50:00,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 11:50:00,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:50:00,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:50:00,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:50:00,334 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-26 11:50:00,334 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-26 11:50:00,334 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-26 11:50:00,334 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-26 11:50:00,335 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-26 11:50:00,335 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-26 11:50:00,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:50:00,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:50:00,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:50:00,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:50:00,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 11:50:00,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 11:50:00,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:50:00,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:50:00,338 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:50:00,552 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:50:00,555 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:50:01,330 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:50:02,019 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:50:02,019 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-26 11:50:02,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:50:02 BoogieIcfgContainer [2023-11-26 11:50:02,020 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:50:02,023 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:50:02,023 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:50:02,028 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:50:02,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:49:59" (1/3) ... [2023-11-26 11:50:02,029 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db41705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:50:02, skipping insertion in model container [2023-11-26 11:50:02,029 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:00" (2/3) ... [2023-11-26 11:50:02,030 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db41705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:50:02, skipping insertion in model container [2023-11-26 11:50:02,030 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:50:02" (3/3) ... [2023-11-26 11:50:02,032 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi006_rmo.i [2023-11-26 11:50:02,059 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:50:02,059 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-11-26 11:50:02,060 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:50:02,268 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-26 11:50:02,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 88 transitions, 188 flow [2023-11-26 11:50:02,385 INFO L124 PetriNetUnfolderBase]: 2/85 cut-off events. [2023-11-26 11:50:02,385 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:50:02,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 85 events. 2/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 279 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 84. Up to 2 conditions per place. [2023-11-26 11:50:02,391 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 88 transitions, 188 flow [2023-11-26 11:50:02,398 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 85 transitions, 179 flow [2023-11-26 11:50:02,410 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:50:02,419 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;@13453738, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:50:02,420 INFO L358 AbstractCegarLoop]: Starting to check reachability of 77 error locations. [2023-11-26 11:50:02,424 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:50:02,425 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-26 11:50:02,425 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:50:02,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:02,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-26 11:50:02,427 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-26 11:50:02,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:02,434 INFO L85 PathProgramCache]: Analyzing trace with hash 22763, now seen corresponding path program 1 times [2023-11-26 11:50:02,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:02,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994478824] [2023-11-26 11:50:02,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:02,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:02,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:02,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994478824] [2023-11-26 11:50:02,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994478824] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:02,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:02,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:50:02,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807319848] [2023-11-26 11:50:02,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:02,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:50:02,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:03,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:50:03,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:03,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 88 [2023-11-26 11:50:03,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 85 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2023-11-26 11:50:03,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:03,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 88 [2023-11-26 11:50:03,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:07,006 INFO L124 PetriNetUnfolderBase]: 9214/14346 cut-off events. [2023-11-26 11:50:07,006 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-26 11:50:07,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27439 conditions, 14346 events. 9214/14346 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 1466. Compared 119102 event pairs, 7964 based on Foata normal form. 500/7829 useless extension candidates. Maximal degree in co-relation 27425. Up to 11276 conditions per place. [2023-11-26 11:50:07,202 INFO L140 encePairwiseOnDemand]: 63/88 looper letters, 53 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-11-26 11:50:07,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 78 transitions, 275 flow [2023-11-26 11:50:07,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:50:07,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:50:07,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 176 transitions. [2023-11-26 11:50:07,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-26 11:50:07,217 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 176 transitions. [2023-11-26 11:50:07,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 176 transitions. [2023-11-26 11:50:07,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:07,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 176 transitions. [2023-11-26 11:50:07,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2023-11-26 11:50:07,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 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) [2023-11-26 11:50:07,230 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 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) [2023-11-26 11:50:07,232 INFO L175 Difference]: Start difference. First operand has 93 places, 85 transitions, 179 flow. Second operand 3 states and 176 transitions. [2023-11-26 11:50:07,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 78 transitions, 275 flow [2023-11-26 11:50:07,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 78 transitions, 272 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:50:07,244 INFO L231 Difference]: Finished difference. Result has 70 places, 61 transitions, 132 flow [2023-11-26 11:50:07,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=70, PETRI_TRANSITIONS=61} [2023-11-26 11:50:07,252 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -23 predicate places. [2023-11-26 11:50:07,253 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 61 transitions, 132 flow [2023-11-26 11:50:07,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2023-11-26 11:50:07,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:07,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-26 11:50:07,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:50:07,255 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-26 11:50:07,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:07,258 INFO L85 PathProgramCache]: Analyzing trace with hash 22764, now seen corresponding path program 1 times [2023-11-26 11:50:07,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:07,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868664025] [2023-11-26 11:50:07,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:07,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:07,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:07,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868664025] [2023-11-26 11:50:07,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868664025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:07,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:07,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:50:07,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318188432] [2023-11-26 11:50:07,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:07,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:50:07,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:07,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:50:07,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:07,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2023-11-26 11:50:07,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 61 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2023-11-26 11:50:07,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:07,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2023-11-26 11:50:07,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:10,834 INFO L124 PetriNetUnfolderBase]: 9214/14345 cut-off events. [2023-11-26 11:50:10,835 INFO L125 PetriNetUnfolderBase]: For 250/250 co-relation queries the response was YES. [2023-11-26 11:50:10,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27686 conditions, 14345 events. 9214/14345 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 1466. Compared 118894 event pairs, 7964 based on Foata normal form. 1/7329 useless extension candidates. Maximal degree in co-relation 27675. Up to 11275 conditions per place. [2023-11-26 11:50:10,968 INFO L140 encePairwiseOnDemand]: 85/88 looper letters, 52 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-11-26 11:50:10,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 77 transitions, 272 flow [2023-11-26 11:50:10,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:50:10,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:50:10,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 136 transitions. [2023-11-26 11:50:10,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2023-11-26 11:50:10,982 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 136 transitions. [2023-11-26 11:50:10,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 136 transitions. [2023-11-26 11:50:10,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:10,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 136 transitions. [2023-11-26 11:50:10,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2023-11-26 11:50:10,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 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) [2023-11-26 11:50:10,993 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 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) [2023-11-26 11:50:10,993 INFO L175 Difference]: Start difference. First operand has 70 places, 61 transitions, 132 flow. Second operand 3 states and 136 transitions. [2023-11-26 11:50:10,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 77 transitions, 272 flow [2023-11-26 11:50:11,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 77 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:50:11,052 INFO L231 Difference]: Finished difference. Result has 69 places, 60 transitions, 130 flow [2023-11-26 11:50:11,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=69, PETRI_TRANSITIONS=60} [2023-11-26 11:50:11,054 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -24 predicate places. [2023-11-26 11:50:11,054 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 60 transitions, 130 flow [2023-11-26 11:50:11,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2023-11-26 11:50:11,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:11,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:50:11,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:50:11,056 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-26 11:50:11,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:11,059 INFO L85 PathProgramCache]: Analyzing trace with hash 678886352, now seen corresponding path program 1 times [2023-11-26 11:50:11,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:11,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439616638] [2023-11-26 11:50:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:11,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:11,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:11,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439616638] [2023-11-26 11:50:11,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439616638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:11,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:11,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:50:11,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76419633] [2023-11-26 11:50:11,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:11,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:50:11,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:11,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:50:11,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:11,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 88 [2023-11-26 11:50:11,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 60 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2023-11-26 11:50:11,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:11,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 88 [2023-11-26 11:50:11,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:13,795 INFO L124 PetriNetUnfolderBase]: 9218/14344 cut-off events. [2023-11-26 11:50:13,796 INFO L125 PetriNetUnfolderBase]: For 250/250 co-relation queries the response was YES. [2023-11-26 11:50:13,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27694 conditions, 14344 events. 9218/14344 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 1466. Compared 119763 event pairs, 5720 based on Foata normal form. 0/7336 useless extension candidates. Maximal degree in co-relation 27683. Up to 11278 conditions per place. [2023-11-26 11:50:13,975 INFO L140 encePairwiseOnDemand]: 85/88 looper letters, 53 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-11-26 11:50:13,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 76 transitions, 272 flow [2023-11-26 11:50:13,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:50:13,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:50:13,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 134 transitions. [2023-11-26 11:50:13,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2023-11-26 11:50:13,980 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 134 transitions. [2023-11-26 11:50:13,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 134 transitions. [2023-11-26 11:50:13,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:13,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 134 transitions. [2023-11-26 11:50:13,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2023-11-26 11:50:13,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 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) [2023-11-26 11:50:13,987 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 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) [2023-11-26 11:50:13,988 INFO L175 Difference]: Start difference. First operand has 69 places, 60 transitions, 130 flow. Second operand 3 states and 134 transitions. [2023-11-26 11:50:13,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 76 transitions, 272 flow [2023-11-26 11:50:14,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:50:14,016 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 128 flow [2023-11-26 11:50:14,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2023-11-26 11:50:14,019 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -25 predicate places. [2023-11-26 11:50:14,019 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 128 flow [2023-11-26 11:50:14,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2023-11-26 11:50:14,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:14,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:50:14,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:50:14,022 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-26 11:50:14,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:14,023 INFO L85 PathProgramCache]: Analyzing trace with hash 678886353, now seen corresponding path program 1 times [2023-11-26 11:50:14,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:14,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598137290] [2023-11-26 11:50:14,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:14,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:14,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:14,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:14,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598137290] [2023-11-26 11:50:14,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598137290] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:14,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:14,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:50:14,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642782228] [2023-11-26 11:50:14,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:14,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:50:14,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:14,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:50:14,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:14,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2023-11-26 11:50:14,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2023-11-26 11:50:14,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:14,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2023-11-26 11:50:14,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:16,748 INFO L124 PetriNetUnfolderBase]: 9214/14334 cut-off events. [2023-11-26 11:50:16,748 INFO L125 PetriNetUnfolderBase]: For 254/254 co-relation queries the response was YES. [2023-11-26 11:50:16,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27679 conditions, 14334 events. 9214/14334 cut-off events. For 254/254 co-relation queries the response was YES. Maximal size of possible extension queue 1466. Compared 119768 event pairs, 6280 based on Foata normal form. 5/7334 useless extension candidates. Maximal degree in co-relation 27669. Up to 11269 conditions per place. [2023-11-26 11:50:16,893 INFO L140 encePairwiseOnDemand]: 85/88 looper letters, 52 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-11-26 11:50:16,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 75 transitions, 268 flow [2023-11-26 11:50:16,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:50:16,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:50:16,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 136 transitions. [2023-11-26 11:50:16,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2023-11-26 11:50:16,896 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 136 transitions. [2023-11-26 11:50:16,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 136 transitions. [2023-11-26 11:50:16,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:16,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 136 transitions. [2023-11-26 11:50:16,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2023-11-26 11:50:16,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 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) [2023-11-26 11:50:16,902 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 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) [2023-11-26 11:50:16,902 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 128 flow. Second operand 3 states and 136 transitions. [2023-11-26 11:50:16,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 75 transitions, 268 flow [2023-11-26 11:50:16,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 264 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:50:16,916 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 126 flow [2023-11-26 11:50:16,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2023-11-26 11:50:16,919 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -26 predicate places. [2023-11-26 11:50:16,919 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 126 flow [2023-11-26 11:50:16,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2023-11-26 11:50:16,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:16,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:50:16,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:50:16,922 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-26 11:50:16,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:16,924 INFO L85 PathProgramCache]: Analyzing trace with hash 678888624, now seen corresponding path program 1 times [2023-11-26 11:50:16,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:16,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913565821] [2023-11-26 11:50:16,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:16,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:17,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:17,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913565821] [2023-11-26 11:50:17,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913565821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:17,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:17,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:50:17,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599063688] [2023-11-26 11:50:17,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:17,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:17,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:17,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:17,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:50:17,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2023-11-26 11:50:17,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2023-11-26 11:50:17,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:17,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2023-11-26 11:50:17,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:18,474 INFO L124 PetriNetUnfolderBase]: 3959/6369 cut-off events. [2023-11-26 11:50:18,475 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2023-11-26 11:50:18,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12263 conditions, 6369 events. 3959/6369 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 49066 event pairs, 3059 based on Foata normal form. 0/3953 useless extension candidates. Maximal degree in co-relation 12252. Up to 4121 conditions per place. [2023-11-26 11:50:18,529 INFO L140 encePairwiseOnDemand]: 79/88 looper letters, 46 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-11-26 11:50:18,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 68 transitions, 242 flow [2023-11-26 11:50:18,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:50:18,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:50:18,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 136 transitions. [2023-11-26 11:50:18,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2023-11-26 11:50:18,534 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 136 transitions. [2023-11-26 11:50:18,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 136 transitions. [2023-11-26 11:50:18,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:18,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 136 transitions. [2023-11-26 11:50:18,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2023-11-26 11:50:18,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 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) [2023-11-26 11:50:18,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 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) [2023-11-26 11:50:18,537 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 126 flow. Second operand 3 states and 136 transitions. [2023-11-26 11:50:18,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 68 transitions, 242 flow [2023-11-26 11:50:18,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 68 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:50:18,545 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 134 flow [2023-11-26 11:50:18,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2023-11-26 11:50:18,551 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -27 predicate places. [2023-11-26 11:50:18,551 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 134 flow [2023-11-26 11:50:18,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2023-11-26 11:50:18,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:18,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:50:18,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:50:18,553 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-26 11:50:18,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:18,554 INFO L85 PathProgramCache]: Analyzing trace with hash 678888625, now seen corresponding path program 1 times [2023-11-26 11:50:18,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:18,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840965299] [2023-11-26 11:50:18,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:18,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:18,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:18,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840965299] [2023-11-26 11:50:18,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840965299] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:18,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:18,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:50:18,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72099431] [2023-11-26 11:50:18,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:18,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:18,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:18,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:18,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:50:18,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 88 [2023-11-26 11:50:18,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-26 11:50:18,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:18,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 88 [2023-11-26 11:50:18,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:19,194 INFO L124 PetriNetUnfolderBase]: 1120/1941 cut-off events. [2023-11-26 11:50:19,194 INFO L125 PetriNetUnfolderBase]: For 100/100 co-relation queries the response was YES. [2023-11-26 11:50:19,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3945 conditions, 1941 events. 1120/1941 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 13300 event pairs, 800 based on Foata normal form. 0/1792 useless extension candidates. Maximal degree in co-relation 3933. Up to 1017 conditions per place. [2023-11-26 11:50:19,207 INFO L140 encePairwiseOnDemand]: 79/88 looper letters, 33 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-11-26 11:50:19,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 56 transitions, 204 flow [2023-11-26 11:50:19,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:50:19,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:50:19,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 159 transitions. [2023-11-26 11:50:19,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2023-11-26 11:50:19,210 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 159 transitions. [2023-11-26 11:50:19,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 159 transitions. [2023-11-26 11:50:19,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:19,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 159 transitions. [2023-11-26 11:50:19,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 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) [2023-11-26 11:50:19,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 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) [2023-11-26 11:50:19,213 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 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) [2023-11-26 11:50:19,214 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 134 flow. Second operand 4 states and 159 transitions. [2023-11-26 11:50:19,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 56 transitions, 204 flow [2023-11-26 11:50:19,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 56 transitions, 200 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:50:19,217 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 120 flow [2023-11-26 11:50:19,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2023-11-26 11:50:19,218 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -33 predicate places. [2023-11-26 11:50:19,218 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 120 flow [2023-11-26 11:50:19,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-26 11:50:19,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:19,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:19,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:50:19,220 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-26 11:50:19,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:19,221 INFO L85 PathProgramCache]: Analyzing trace with hash -296925006, now seen corresponding path program 1 times [2023-11-26 11:50:19,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:19,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252172514] [2023-11-26 11:50:19,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:19,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:19,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:19,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252172514] [2023-11-26 11:50:19,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252172514] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:19,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:19,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:50:19,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080661159] [2023-11-26 11:50:19,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:19,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:50:19,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:19,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:50:19,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:19,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 88 [2023-11-26 11:50:19,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2023-11-26 11:50:19,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:19,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 88 [2023-11-26 11:50:19,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:19,713 INFO L124 PetriNetUnfolderBase]: 1132/1932 cut-off events. [2023-11-26 11:50:19,714 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-26 11:50:19,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3957 conditions, 1932 events. 1132/1932 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 13135 event pairs, 734 based on Foata normal form. 0/1798 useless extension candidates. Maximal degree in co-relation 3945. Up to 1014 conditions per place. [2023-11-26 11:50:19,725 INFO L140 encePairwiseOnDemand]: 85/88 looper letters, 34 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-11-26 11:50:19,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 55 transitions, 204 flow [2023-11-26 11:50:19,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:50:19,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:50:19,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2023-11-26 11:50:19,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356060606060606 [2023-11-26 11:50:19,728 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 115 transitions. [2023-11-26 11:50:19,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 115 transitions. [2023-11-26 11:50:19,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:19,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 115 transitions. [2023-11-26 11:50:19,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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) [2023-11-26 11:50:19,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 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) [2023-11-26 11:50:19,732 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 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) [2023-11-26 11:50:19,732 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 120 flow. Second operand 3 states and 115 transitions. [2023-11-26 11:50:19,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 55 transitions, 204 flow [2023-11-26 11:50:19,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 55 transitions, 201 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:50:19,739 INFO L231 Difference]: Finished difference. Result has 59 places, 48 transitions, 119 flow [2023-11-26 11:50:19,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=59, PETRI_TRANSITIONS=48} [2023-11-26 11:50:19,741 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -34 predicate places. [2023-11-26 11:50:19,741 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 48 transitions, 119 flow [2023-11-26 11:50:19,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2023-11-26 11:50:19,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:19,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:19,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:50:19,742 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-26 11:50:19,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:19,743 INFO L85 PathProgramCache]: Analyzing trace with hash -296925005, now seen corresponding path program 1 times [2023-11-26 11:50:19,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:19,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681400451] [2023-11-26 11:50:19,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:19,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:19,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:19,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:19,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681400451] [2023-11-26 11:50:19,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681400451] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:19,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:19,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:50:19,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394988202] [2023-11-26 11:50:19,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:19,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:50:19,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:19,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:50:19,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:19,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2023-11-26 11:50:19,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 48 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2023-11-26 11:50:19,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:19,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2023-11-26 11:50:19,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:20,386 INFO L124 PetriNetUnfolderBase]: 1120/1923 cut-off events. [2023-11-26 11:50:20,386 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2023-11-26 11:50:20,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3971 conditions, 1923 events. 1120/1923 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 13043 event pairs, 580 based on Foata normal form. 9/1804 useless extension candidates. Maximal degree in co-relation 3960. Up to 993 conditions per place. [2023-11-26 11:50:20,407 INFO L140 encePairwiseOnDemand]: 85/88 looper letters, 33 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-11-26 11:50:20,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 54 transitions, 201 flow [2023-11-26 11:50:20,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:50:20,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:50:20,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 117 transitions. [2023-11-26 11:50:20,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2023-11-26 11:50:20,410 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 117 transitions. [2023-11-26 11:50:20,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 117 transitions. [2023-11-26 11:50:20,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:20,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 117 transitions. [2023-11-26 11:50:20,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2023-11-26 11:50:20,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 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) [2023-11-26 11:50:20,414 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 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) [2023-11-26 11:50:20,414 INFO L175 Difference]: Start difference. First operand has 59 places, 48 transitions, 119 flow. Second operand 3 states and 117 transitions. [2023-11-26 11:50:20,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 54 transitions, 201 flow [2023-11-26 11:50:20,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 54 transitions, 197 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:50:20,417 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 117 flow [2023-11-26 11:50:20,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2023-11-26 11:50:20,419 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -35 predicate places. [2023-11-26 11:50:20,419 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 117 flow [2023-11-26 11:50:20,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2023-11-26 11:50:20,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:20,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:20,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:50:20,421 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-26 11:50:20,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:20,421 INFO L85 PathProgramCache]: Analyzing trace with hash 123237865, now seen corresponding path program 1 times [2023-11-26 11:50:20,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:20,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334127975] [2023-11-26 11:50:20,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:20,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:20,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:20,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:20,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334127975] [2023-11-26 11:50:20,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334127975] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:20,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:20,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:50:20,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109839013] [2023-11-26 11:50:20,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:20,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:50:20,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:20,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:50:20,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:20,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 88 [2023-11-26 11:50:20,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2023-11-26 11:50:20,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:20,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 88 [2023-11-26 11:50:20,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:21,160 INFO L124 PetriNetUnfolderBase]: 1062/2132 cut-off events. [2023-11-26 11:50:21,161 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2023-11-26 11:50:21,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4098 conditions, 2132 events. 1062/2132 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 16067 event pairs, 328 based on Foata normal form. 0/2018 useless extension candidates. Maximal degree in co-relation 4087. Up to 1103 conditions per place. [2023-11-26 11:50:21,175 INFO L140 encePairwiseOnDemand]: 84/88 looper letters, 47 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-11-26 11:50:21,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 275 flow [2023-11-26 11:50:21,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:50:21,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:50:21,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2023-11-26 11:50:21,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2023-11-26 11:50:21,178 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 135 transitions. [2023-11-26 11:50:21,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 135 transitions. [2023-11-26 11:50:21,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:21,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 135 transitions. [2023-11-26 11:50:21,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2023-11-26 11:50:21,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 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) [2023-11-26 11:50:21,182 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 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) [2023-11-26 11:50:21,182 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 117 flow. Second operand 3 states and 135 transitions. [2023-11-26 11:50:21,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 275 flow [2023-11-26 11:50:21,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 68 transitions, 267 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:50:21,185 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 123 flow [2023-11-26 11:50:21,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2023-11-26 11:50:21,187 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -34 predicate places. [2023-11-26 11:50:21,188 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 123 flow [2023-11-26 11:50:21,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2023-11-26 11:50:21,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:21,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:21,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:50:21,189 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-26 11:50:21,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:21,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1827405573, now seen corresponding path program 1 times [2023-11-26 11:50:21,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:21,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266537522] [2023-11-26 11:50:21,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:21,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:21,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:21,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:21,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266537522] [2023-11-26 11:50:21,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266537522] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:21,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:21,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:21,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182969688] [2023-11-26 11:50:21,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:21,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:21,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:21,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:21,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:50:21,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 88 [2023-11-26 11:50:21,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2023-11-26 11:50:21,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:21,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 88 [2023-11-26 11:50:21,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:22,021 INFO L124 PetriNetUnfolderBase]: 1280/2718 cut-off events. [2023-11-26 11:50:22,022 INFO L125 PetriNetUnfolderBase]: For 404/404 co-relation queries the response was YES. [2023-11-26 11:50:22,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5507 conditions, 2718 events. 1280/2718 cut-off events. For 404/404 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 22438 event pairs, 304 based on Foata normal form. 172/2836 useless extension candidates. Maximal degree in co-relation 5494. Up to 972 conditions per place. [2023-11-26 11:50:22,040 INFO L140 encePairwiseOnDemand]: 76/88 looper letters, 45 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2023-11-26 11:50:22,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 72 transitions, 286 flow [2023-11-26 11:50:22,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:50:22,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:50:22,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 175 transitions. [2023-11-26 11:50:22,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4971590909090909 [2023-11-26 11:50:22,042 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 175 transitions. [2023-11-26 11:50:22,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 175 transitions. [2023-11-26 11:50:22,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:22,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 175 transitions. [2023-11-26 11:50:22,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 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) [2023-11-26 11:50:22,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 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) [2023-11-26 11:50:22,045 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 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) [2023-11-26 11:50:22,045 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 123 flow. Second operand 4 states and 175 transitions. [2023-11-26 11:50:22,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 72 transitions, 286 flow [2023-11-26 11:50:22,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 72 transitions, 280 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:50:22,049 INFO L231 Difference]: Finished difference. Result has 62 places, 51 transitions, 184 flow [2023-11-26 11:50:22,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=62, PETRI_TRANSITIONS=51} [2023-11-26 11:50:22,050 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -31 predicate places. [2023-11-26 11:50:22,050 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 184 flow [2023-11-26 11:50:22,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2023-11-26 11:50:22,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:22,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:22,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 11:50:22,051 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-26 11:50:22,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:22,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1827405572, now seen corresponding path program 1 times [2023-11-26 11:50:22,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:22,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798447853] [2023-11-26 11:50:22,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:22,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:22,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:22,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798447853] [2023-11-26 11:50:22,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798447853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:22,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:22,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:22,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321187125] [2023-11-26 11:50:22,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:22,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:50:22,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:22,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:50:22,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:50:22,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 88 [2023-11-26 11:50:22,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 184 flow. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 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) [2023-11-26 11:50:22,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:22,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 88 [2023-11-26 11:50:22,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:23,009 INFO L124 PetriNetUnfolderBase]: 1234/2576 cut-off events. [2023-11-26 11:50:23,009 INFO L125 PetriNetUnfolderBase]: For 1348/1348 co-relation queries the response was YES. [2023-11-26 11:50:23,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6482 conditions, 2576 events. 1234/2576 cut-off events. For 1348/1348 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 20408 event pairs, 612 based on Foata normal form. 24/2554 useless extension candidates. Maximal degree in co-relation 6466. Up to 1378 conditions per place. [2023-11-26 11:50:23,025 INFO L140 encePairwiseOnDemand]: 85/88 looper letters, 51 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2023-11-26 11:50:23,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 73 transitions, 380 flow [2023-11-26 11:50:23,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:50:23,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:50:23,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 160 transitions. [2023-11-26 11:50:23,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-11-26 11:50:23,027 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 160 transitions. [2023-11-26 11:50:23,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 160 transitions. [2023-11-26 11:50:23,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:23,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 160 transitions. [2023-11-26 11:50:23,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2023-11-26 11:50:23,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 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) [2023-11-26 11:50:23,031 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 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) [2023-11-26 11:50:23,031 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 184 flow. Second operand 4 states and 160 transitions. [2023-11-26 11:50:23,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 73 transitions, 380 flow [2023-11-26 11:50:23,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 73 transitions, 377 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:50:23,038 INFO L231 Difference]: Finished difference. Result has 63 places, 50 transitions, 183 flow [2023-11-26 11:50:23,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=63, PETRI_TRANSITIONS=50} [2023-11-26 11:50:23,039 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -30 predicate places. [2023-11-26 11:50:23,039 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 50 transitions, 183 flow [2023-11-26 11:50:23,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 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) [2023-11-26 11:50:23,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:23,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:23,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 11:50:23,040 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-26 11:50:23,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:23,041 INFO L85 PathProgramCache]: Analyzing trace with hash 439801253, now seen corresponding path program 1 times [2023-11-26 11:50:23,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:23,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621310906] [2023-11-26 11:50:23,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:23,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:23,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:23,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621310906] [2023-11-26 11:50:23,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621310906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:23,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:23,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:50:23,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908716495] [2023-11-26 11:50:23,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:23,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:50:23,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:23,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:50:23,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:50:24,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 88 [2023-11-26 11:50:24,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 183 flow. Second operand has 9 states, 9 states have (on average 24.666666666666668) internal successors, (222), 9 states have internal predecessors, (222), 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) [2023-11-26 11:50:24,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:24,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 88 [2023-11-26 11:50:24,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:25,027 INFO L124 PetriNetUnfolderBase]: 1921/3832 cut-off events. [2023-11-26 11:50:25,028 INFO L125 PetriNetUnfolderBase]: For 2282/2282 co-relation queries the response was YES. [2023-11-26 11:50:25,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9433 conditions, 3832 events. 1921/3832 cut-off events. For 2282/2282 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 32122 event pairs, 697 based on Foata normal form. 0/3677 useless extension candidates. Maximal degree in co-relation 9415. Up to 1308 conditions per place. [2023-11-26 11:50:25,054 INFO L140 encePairwiseOnDemand]: 81/88 looper letters, 74 selfloop transitions, 9 changer transitions 0/99 dead transitions. [2023-11-26 11:50:25,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 99 transitions, 533 flow [2023-11-26 11:50:25,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:50:25,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:50:25,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 238 transitions. [2023-11-26 11:50:25,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2023-11-26 11:50:25,056 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 238 transitions. [2023-11-26 11:50:25,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 238 transitions. [2023-11-26 11:50:25,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:25,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 238 transitions. [2023-11-26 11:50:25,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 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) [2023-11-26 11:50:25,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 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) [2023-11-26 11:50:25,060 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 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) [2023-11-26 11:50:25,060 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 183 flow. Second operand 7 states and 238 transitions. [2023-11-26 11:50:25,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 99 transitions, 533 flow [2023-11-26 11:50:25,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 99 transitions, 526 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:50:25,067 INFO L231 Difference]: Finished difference. Result has 72 places, 57 transitions, 259 flow [2023-11-26 11:50:25,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=259, PETRI_PLACES=72, PETRI_TRANSITIONS=57} [2023-11-26 11:50:25,068 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -21 predicate places. [2023-11-26 11:50:25,068 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 259 flow [2023-11-26 11:50:25,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 24.666666666666668) internal successors, (222), 9 states have internal predecessors, (222), 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) [2023-11-26 11:50:25,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:25,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:25,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 11:50:25,069 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-26 11:50:25,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:25,070 INFO L85 PathProgramCache]: Analyzing trace with hash 439800212, now seen corresponding path program 1 times [2023-11-26 11:50:25,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:25,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491886633] [2023-11-26 11:50:25,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:25,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:25,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:25,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491886633] [2023-11-26 11:50:25,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491886633] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:25,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:25,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:50:25,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720675469] [2023-11-26 11:50:25,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:25,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:50:25,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:25,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:50:25,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:50:25,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 88 [2023-11-26 11:50:25,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 57 transitions, 259 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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) [2023-11-26 11:50:25,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:25,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 88 [2023-11-26 11:50:25,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:26,951 INFO L124 PetriNetUnfolderBase]: 5589/10530 cut-off events. [2023-11-26 11:50:26,951 INFO L125 PetriNetUnfolderBase]: For 9683/9963 co-relation queries the response was YES. [2023-11-26 11:50:26,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27422 conditions, 10530 events. 5589/10530 cut-off events. For 9683/9963 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 94950 event pairs, 1819 based on Foata normal form. 0/10126 useless extension candidates. Maximal degree in co-relation 27400. Up to 4595 conditions per place. [2023-11-26 11:50:27,026 INFO L140 encePairwiseOnDemand]: 80/88 looper letters, 107 selfloop transitions, 20 changer transitions 1/144 dead transitions. [2023-11-26 11:50:27,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 144 transitions, 947 flow [2023-11-26 11:50:27,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:50:27,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 11:50:27,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 301 transitions. [2023-11-26 11:50:27,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4275568181818182 [2023-11-26 11:50:27,030 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 301 transitions. [2023-11-26 11:50:27,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 301 transitions. [2023-11-26 11:50:27,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:27,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 301 transitions. [2023-11-26 11:50:27,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 37.625) internal successors, (301), 8 states have internal predecessors, (301), 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) [2023-11-26 11:50:27,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 88.0) internal successors, (792), 9 states have internal predecessors, (792), 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) [2023-11-26 11:50:27,035 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 88.0) internal successors, (792), 9 states have internal predecessors, (792), 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) [2023-11-26 11:50:27,035 INFO L175 Difference]: Start difference. First operand has 72 places, 57 transitions, 259 flow. Second operand 8 states and 301 transitions. [2023-11-26 11:50:27,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 144 transitions, 947 flow [2023-11-26 11:50:27,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 144 transitions, 947 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:50:27,075 INFO L231 Difference]: Finished difference. Result has 84 places, 73 transitions, 437 flow [2023-11-26 11:50:27,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=437, PETRI_PLACES=84, PETRI_TRANSITIONS=73} [2023-11-26 11:50:27,076 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -9 predicate places. [2023-11-26 11:50:27,076 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 73 transitions, 437 flow [2023-11-26 11:50:27,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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) [2023-11-26 11:50:27,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:27,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:27,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 11:50:27,077 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-26 11:50:27,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:27,078 INFO L85 PathProgramCache]: Analyzing trace with hash 748938258, now seen corresponding path program 1 times [2023-11-26 11:50:27,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:27,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454586584] [2023-11-26 11:50:27,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:27,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:27,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:27,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454586584] [2023-11-26 11:50:27,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454586584] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:27,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:27,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:27,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024369438] [2023-11-26 11:50:27,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:27,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:27,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:27,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:27,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:50:27,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2023-11-26 11:50:27,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 73 transitions, 437 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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) [2023-11-26 11:50:27,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:27,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2023-11-26 11:50:27,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:28,407 INFO L124 PetriNetUnfolderBase]: 5028/8713 cut-off events. [2023-11-26 11:50:28,407 INFO L125 PetriNetUnfolderBase]: For 8321/8601 co-relation queries the response was YES. [2023-11-26 11:50:28,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24076 conditions, 8713 events. 5028/8713 cut-off events. For 8321/8601 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 67257 event pairs, 909 based on Foata normal form. 170/8680 useless extension candidates. Maximal degree in co-relation 24047. Up to 6261 conditions per place. [2023-11-26 11:50:28,479 INFO L140 encePairwiseOnDemand]: 82/88 looper letters, 70 selfloop transitions, 5 changer transitions 1/98 dead transitions. [2023-11-26 11:50:28,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 98 transitions, 687 flow [2023-11-26 11:50:28,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:50:28,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:50:28,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 151 transitions. [2023-11-26 11:50:28,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2023-11-26 11:50:28,483 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 151 transitions. [2023-11-26 11:50:28,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 151 transitions. [2023-11-26 11:50:28,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:28,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 151 transitions. [2023-11-26 11:50:28,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 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) [2023-11-26 11:50:28,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 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) [2023-11-26 11:50:28,486 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 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) [2023-11-26 11:50:28,486 INFO L175 Difference]: Start difference. First operand has 84 places, 73 transitions, 437 flow. Second operand 4 states and 151 transitions. [2023-11-26 11:50:28,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 98 transitions, 687 flow [2023-11-26 11:50:28,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 98 transitions, 687 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:50:28,561 INFO L231 Difference]: Finished difference. Result has 89 places, 76 transitions, 466 flow [2023-11-26 11:50:28,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=466, PETRI_PLACES=89, PETRI_TRANSITIONS=76} [2023-11-26 11:50:28,562 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -4 predicate places. [2023-11-26 11:50:28,562 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 76 transitions, 466 flow [2023-11-26 11:50:28,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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) [2023-11-26 11:50:28,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:28,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:28,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 11:50:28,563 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-26 11:50:28,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:28,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1456517813, now seen corresponding path program 1 times [2023-11-26 11:50:28,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:28,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599090327] [2023-11-26 11:50:28,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:28,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:30,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:30,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599090327] [2023-11-26 11:50:30,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599090327] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:30,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:30,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 11:50:30,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918779470] [2023-11-26 11:50:30,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:30,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:50:30,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:30,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:50:30,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:50:31,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 88 [2023-11-26 11:50:31,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 76 transitions, 466 flow. Second operand has 11 states, 11 states have (on average 24.454545454545453) internal successors, (269), 11 states have internal predecessors, (269), 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) [2023-11-26 11:50:31,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:31,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 88 [2023-11-26 11:50:31,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:33,097 INFO L124 PetriNetUnfolderBase]: 4779/9366 cut-off events. [2023-11-26 11:50:33,098 INFO L125 PetriNetUnfolderBase]: For 9044/9164 co-relation queries the response was YES. [2023-11-26 11:50:33,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26779 conditions, 9366 events. 4779/9366 cut-off events. For 9044/9164 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 84936 event pairs, 2810 based on Foata normal form. 198/8953 useless extension candidates. Maximal degree in co-relation 26745. Up to 2502 conditions per place. [2023-11-26 11:50:33,183 INFO L140 encePairwiseOnDemand]: 79/88 looper letters, 78 selfloop transitions, 23 changer transitions 1/129 dead transitions. [2023-11-26 11:50:33,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 129 transitions, 936 flow [2023-11-26 11:50:33,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:50:33,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 11:50:33,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 262 transitions. [2023-11-26 11:50:33,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3721590909090909 [2023-11-26 11:50:33,186 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 262 transitions. [2023-11-26 11:50:33,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 262 transitions. [2023-11-26 11:50:33,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:33,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 262 transitions. [2023-11-26 11:50:33,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 32.75) internal successors, (262), 8 states have internal predecessors, (262), 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) [2023-11-26 11:50:33,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 88.0) internal successors, (792), 9 states have internal predecessors, (792), 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) [2023-11-26 11:50:33,191 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 88.0) internal successors, (792), 9 states have internal predecessors, (792), 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) [2023-11-26 11:50:33,191 INFO L175 Difference]: Start difference. First operand has 89 places, 76 transitions, 466 flow. Second operand 8 states and 262 transitions. [2023-11-26 11:50:33,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 129 transitions, 936 flow [2023-11-26 11:50:33,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 129 transitions, 919 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:50:33,292 INFO L231 Difference]: Finished difference. Result has 99 places, 91 transitions, 671 flow [2023-11-26 11:50:33,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=671, PETRI_PLACES=99, PETRI_TRANSITIONS=91} [2023-11-26 11:50:33,293 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, 6 predicate places. [2023-11-26 11:50:33,294 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 91 transitions, 671 flow [2023-11-26 11:50:33,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 24.454545454545453) internal successors, (269), 11 states have internal predecessors, (269), 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) [2023-11-26 11:50:33,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:33,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:33,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 11:50:33,295 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-26 11:50:33,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:33,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1793085794, now seen corresponding path program 1 times [2023-11-26 11:50:33,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:33,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988107116] [2023-11-26 11:50:33,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:33,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:33,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:33,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:33,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988107116] [2023-11-26 11:50:33,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988107116] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:33,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:33,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:50:33,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051456627] [2023-11-26 11:50:33,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:33,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:50:33,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:33,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:50:33,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:50:33,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 88 [2023-11-26 11:50:33,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 91 transitions, 671 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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) [2023-11-26 11:50:33,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:33,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 88 [2023-11-26 11:50:33,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:36,610 INFO L124 PetriNetUnfolderBase]: 11676/21288 cut-off events. [2023-11-26 11:50:36,611 INFO L125 PetriNetUnfolderBase]: For 34733/35094 co-relation queries the response was YES. [2023-11-26 11:50:36,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66308 conditions, 21288 events. 11676/21288 cut-off events. For 34733/35094 co-relation queries the response was YES. Maximal size of possible extension queue 1543. Compared 202027 event pairs, 3565 based on Foata normal form. 273/20513 useless extension candidates. Maximal degree in co-relation 66270. Up to 6689 conditions per place. [2023-11-26 11:50:36,798 INFO L140 encePairwiseOnDemand]: 81/88 looper letters, 154 selfloop transitions, 44 changer transitions 3/221 dead transitions. [2023-11-26 11:50:36,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 221 transitions, 1962 flow [2023-11-26 11:50:36,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:50:36,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:50:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 338 transitions. [2023-11-26 11:50:36,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2023-11-26 11:50:36,801 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 338 transitions. [2023-11-26 11:50:36,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 338 transitions. [2023-11-26 11:50:36,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:36,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 338 transitions. [2023-11-26 11:50:36,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 37.55555555555556) internal successors, (338), 9 states have internal predecessors, (338), 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) [2023-11-26 11:50:36,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 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) [2023-11-26 11:50:36,806 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 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) [2023-11-26 11:50:36,807 INFO L175 Difference]: Start difference. First operand has 99 places, 91 transitions, 671 flow. Second operand 9 states and 338 transitions. [2023-11-26 11:50:36,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 221 transitions, 1962 flow [2023-11-26 11:50:37,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 221 transitions, 1912 flow, removed 23 selfloop flow, removed 1 redundant places. [2023-11-26 11:50:37,489 INFO L231 Difference]: Finished difference. Result has 112 places, 116 transitions, 1119 flow [2023-11-26 11:50:37,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1119, PETRI_PLACES=112, PETRI_TRANSITIONS=116} [2023-11-26 11:50:37,490 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, 19 predicate places. [2023-11-26 11:50:37,490 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 116 transitions, 1119 flow [2023-11-26 11:50:37,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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) [2023-11-26 11:50:37,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:37,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:37,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-26 11:50:37,491 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-26 11:50:37,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:37,491 INFO L85 PathProgramCache]: Analyzing trace with hash -795987212, now seen corresponding path program 1 times [2023-11-26 11:50:37,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:37,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597104792] [2023-11-26 11:50:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:37,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:37,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:37,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597104792] [2023-11-26 11:50:37,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597104792] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:37,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:37,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:50:37,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868290196] [2023-11-26 11:50:37,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:37,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:50:37,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:37,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:50:37,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:50:37,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2023-11-26 11:50:37,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 116 transitions, 1119 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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) [2023-11-26 11:50:37,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:37,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2023-11-26 11:50:37,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:39,623 INFO L124 PetriNetUnfolderBase]: 6892/11744 cut-off events. [2023-11-26 11:50:39,623 INFO L125 PetriNetUnfolderBase]: For 21476/21835 co-relation queries the response was YES. [2023-11-26 11:50:39,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38462 conditions, 11744 events. 6892/11744 cut-off events. For 21476/21835 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 89576 event pairs, 512 based on Foata normal form. 386/11949 useless extension candidates. Maximal degree in co-relation 38419. Up to 6349 conditions per place. [2023-11-26 11:50:39,719 INFO L140 encePairwiseOnDemand]: 82/88 looper letters, 96 selfloop transitions, 8 changer transitions 8/134 dead transitions. [2023-11-26 11:50:39,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 134 transitions, 1237 flow [2023-11-26 11:50:39,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:50:39,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:50:39,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 189 transitions. [2023-11-26 11:50:39,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42954545454545456 [2023-11-26 11:50:39,722 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 189 transitions. [2023-11-26 11:50:39,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 189 transitions. [2023-11-26 11:50:39,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:39,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 189 transitions. [2023-11-26 11:50:39,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 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) [2023-11-26 11:50:39,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 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) [2023-11-26 11:50:39,726 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 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) [2023-11-26 11:50:39,726 INFO L175 Difference]: Start difference. First operand has 112 places, 116 transitions, 1119 flow. Second operand 5 states and 189 transitions. [2023-11-26 11:50:39,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 134 transitions, 1237 flow [2023-11-26 11:50:39,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 134 transitions, 1138 flow, removed 18 selfloop flow, removed 5 redundant places. [2023-11-26 11:50:39,887 INFO L231 Difference]: Finished difference. Result has 109 places, 89 transitions, 672 flow [2023-11-26 11:50:39,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=672, PETRI_PLACES=109, PETRI_TRANSITIONS=89} [2023-11-26 11:50:39,888 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, 16 predicate places. [2023-11-26 11:50:39,888 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 89 transitions, 672 flow [2023-11-26 11:50:39,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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) [2023-11-26 11:50:39,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:39,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:39,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-26 11:50:39,889 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-26 11:50:39,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:39,890 INFO L85 PathProgramCache]: Analyzing trace with hash -906674113, now seen corresponding path program 1 times [2023-11-26 11:50:39,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:39,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157754728] [2023-11-26 11:50:39,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:39,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:40,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:40,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157754728] [2023-11-26 11:50:40,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157754728] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:40,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:40,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:50:40,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119751258] [2023-11-26 11:50:40,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:40,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:50:40,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:40,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:50:40,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:50:40,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2023-11-26 11:50:40,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 89 transitions, 672 flow. Second operand has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 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) [2023-11-26 11:50:40,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:40,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2023-11-26 11:50:40,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:41,959 INFO L124 PetriNetUnfolderBase]: 4070/7640 cut-off events. [2023-11-26 11:50:41,960 INFO L125 PetriNetUnfolderBase]: For 13122/13560 co-relation queries the response was YES. [2023-11-26 11:50:42,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24768 conditions, 7640 events. 4070/7640 cut-off events. For 13122/13560 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 60969 event pairs, 2483 based on Foata normal form. 93/7436 useless extension candidates. Maximal degree in co-relation 24725. Up to 5286 conditions per place. [2023-11-26 11:50:42,040 INFO L140 encePairwiseOnDemand]: 81/88 looper letters, 64 selfloop transitions, 22 changer transitions 13/128 dead transitions. [2023-11-26 11:50:42,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 128 transitions, 1050 flow [2023-11-26 11:50:42,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:50:42,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 11:50:42,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 284 transitions. [2023-11-26 11:50:42,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4034090909090909 [2023-11-26 11:50:42,043 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 284 transitions. [2023-11-26 11:50:42,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 284 transitions. [2023-11-26 11:50:42,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:42,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 284 transitions. [2023-11-26 11:50:42,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 35.5) internal successors, (284), 8 states have internal predecessors, (284), 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) [2023-11-26 11:50:42,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 88.0) internal successors, (792), 9 states have internal predecessors, (792), 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) [2023-11-26 11:50:42,048 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 88.0) internal successors, (792), 9 states have internal predecessors, (792), 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) [2023-11-26 11:50:42,048 INFO L175 Difference]: Start difference. First operand has 109 places, 89 transitions, 672 flow. Second operand 8 states and 284 transitions. [2023-11-26 11:50:42,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 128 transitions, 1050 flow [2023-11-26 11:50:42,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 128 transitions, 993 flow, removed 11 selfloop flow, removed 6 redundant places. [2023-11-26 11:50:42,189 INFO L231 Difference]: Finished difference. Result has 116 places, 92 transitions, 726 flow [2023-11-26 11:50:42,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=726, PETRI_PLACES=116, PETRI_TRANSITIONS=92} [2023-11-26 11:50:42,190 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, 23 predicate places. [2023-11-26 11:50:42,190 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 92 transitions, 726 flow [2023-11-26 11:50:42,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 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) [2023-11-26 11:50:42,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:42,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:42,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-26 11:50:42,191 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2023-11-26 11:50:42,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:42,191 INFO L85 PathProgramCache]: Analyzing trace with hash 78277177, now seen corresponding path program 1 times [2023-11-26 11:50:42,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:42,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183648918] [2023-11-26 11:50:42,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:42,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:44,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:44,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:44,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183648918] [2023-11-26 11:50:44,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183648918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:44,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:44,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:50:44,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622218619] [2023-11-26 11:50:44,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:44,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:50:44,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:44,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:50:44,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:50:44,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2023-11-26 11:50:44,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 92 transitions, 726 flow. Second operand has 8 states, 8 states have (on average 28.75) internal successors, (230), 8 states have internal predecessors, (230), 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) [2023-11-26 11:50:44,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:44,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2023-11-26 11:50:44,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand