./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI --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 034172cc4904075fab6f792587170b7236be9fb41f3a62fa7fbe9a216ec4ca2c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:42:58,978 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:42:59,076 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:42:59,082 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:42:59,083 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:42:59,111 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:42:59,112 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:42:59,113 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:42:59,114 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:42:59,114 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:42:59,115 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:42:59,116 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:42:59,117 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:42:59,117 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:42:59,118 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:42:59,118 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:42:59,119 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:42:59,123 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:42:59,124 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:42:59,124 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:42:59,125 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:42:59,126 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:42:59,126 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:42:59,127 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:42:59,127 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:42:59,128 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:42:59,128 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:42:59,129 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:42:59,130 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:42:59,130 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:42:59,132 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:42:59,132 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:42:59,132 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:42:59,133 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:42:59,133 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:42:59,133 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:42:59,134 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:42:59,134 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:42:59,134 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:42:59,134 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:42:59,135 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:42:59,135 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_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 034172cc4904075fab6f792587170b7236be9fb41f3a62fa7fbe9a216ec4ca2c [2023-11-24 21:42:59,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:42:59,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:42:59,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:42:59,451 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:42:59,451 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:42:59,452 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i [2023-11-24 21:43:02,632 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:43:03,095 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:43:03,096 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i [2023-11-24 21:43:03,125 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/data/267abf906/7a9c7602bf494d02bca2e77b1968aae1/FLAG1ab2a4d93 [2023-11-24 21:43:03,142 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/data/267abf906/7a9c7602bf494d02bca2e77b1968aae1 [2023-11-24 21:43:03,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:43:03,152 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:43:03,156 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:43:03,156 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:43:03,163 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:43:03,164 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:43:03" (1/1) ... [2023-11-24 21:43:03,165 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ecdfbcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:03, skipping insertion in model container [2023-11-24 21:43:03,165 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:43:03" (1/1) ... [2023-11-24 21:43:03,237 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:43:03,998 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:43:04,016 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:43:04,092 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:43:04,192 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:43:04,193 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:04 WrapperNode [2023-11-24 21:43:04,193 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:43:04,195 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:43:04,195 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:43:04,195 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:43:04,203 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:04" (1/1) ... [2023-11-24 21:43:04,242 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:04" (1/1) ... [2023-11-24 21:43:04,278 INFO L138 Inliner]: procedures = 371, calls = 38, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 163 [2023-11-24 21:43:04,278 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:43:04,279 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:43:04,279 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:43:04,279 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:43:04,292 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:04" (1/1) ... [2023-11-24 21:43:04,292 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:04" (1/1) ... [2023-11-24 21:43:04,298 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:04" (1/1) ... [2023-11-24 21:43:04,323 INFO L175 MemorySlicer]: Split 31 memory accesses to 4 slices as follows [1, 1, 7, 22]. 71 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0, 0, 0]. The 20 writes are split as follows [1, 1, 2, 16]. [2023-11-24 21:43:04,323 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:04" (1/1) ... [2023-11-24 21:43:04,323 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:04" (1/1) ... [2023-11-24 21:43:04,338 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:04" (1/1) ... [2023-11-24 21:43:04,341 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:04" (1/1) ... [2023-11-24 21:43:04,345 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:04" (1/1) ... [2023-11-24 21:43:04,347 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:04" (1/1) ... [2023-11-24 21:43:04,353 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:43:04,354 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:43:04,354 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:43:04,354 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:43:04,355 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:04" (1/1) ... [2023-11-24 21:43:04,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:43:04,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:04,392 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:43:04,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:43:04,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:43:04,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:43:04,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 21:43:04,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 21:43:04,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-24 21:43:04,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:43:04,440 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-24 21:43:04,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:43:04,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:43:04,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:43:04,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:43:04,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:43:04,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:43:04,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:43:04,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:43:04,444 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-24 21:43:04,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:43:04,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:43:04,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 21:43:04,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 21:43:04,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 21:43:04,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-24 21:43:04,446 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-24 21:43:04,446 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-24 21:43:04,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:43:04,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:43:04,448 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:43:04,685 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:43:04,688 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:43:05,397 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:43:05,724 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:43:05,725 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 21:43:05,726 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:43:05 BoogieIcfgContainer [2023-11-24 21:43:05,726 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:43:05,730 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:43:05,730 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:43:05,733 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:43:05,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:43:03" (1/3) ... [2023-11-24 21:43:05,735 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7117f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:43:05, skipping insertion in model container [2023-11-24 21:43:05,735 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:04" (2/3) ... [2023-11-24 21:43:05,737 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7117f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:43:05, skipping insertion in model container [2023-11-24 21:43:05,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:43:05" (3/3) ... [2023-11-24 21:43:05,738 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_12-arraycollapse_rc.i [2023-11-24 21:43:05,759 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:43:05,759 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2023-11-24 21:43:05,759 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:43:05,844 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:43:05,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 104 transitions, 212 flow [2023-11-24 21:43:05,979 INFO L124 PetriNetUnfolderBase]: 1/103 cut-off events. [2023-11-24 21:43:05,980 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:43:05,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 103 events. 1/103 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 325 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2023-11-24 21:43:05,983 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 104 transitions, 212 flow [2023-11-24 21:43:05,990 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 103 transitions, 209 flow [2023-11-24 21:43:06,011 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:43:06,020 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;@237e0d40, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:43:06,020 INFO L358 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2023-11-24 21:43:06,026 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:43:06,026 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 21:43:06,026 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:43:06,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:06,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:43:06,028 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-24 21:43:06,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:06,036 INFO L85 PathProgramCache]: Analyzing trace with hash 512839, now seen corresponding path program 1 times [2023-11-24 21:43:06,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:06,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918612641] [2023-11-24 21:43:06,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:06,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:06,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:06,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918612641] [2023-11-24 21:43:06,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918612641] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:06,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:06,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:06,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603925166] [2023-11-24 21:43:06,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:06,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:06,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:06,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:06,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:06,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 104 [2023-11-24 21:43:06,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 103 transitions, 209 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 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) [2023-11-24 21:43:06,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:06,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 104 [2023-11-24 21:43:06,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:06,719 INFO L124 PetriNetUnfolderBase]: 64/292 cut-off events. [2023-11-24 21:43:06,719 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 21:43:06,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 292 events. 64/292 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1333 event pairs, 63 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 376. Up to 157 conditions per place. [2023-11-24 21:43:06,725 INFO L140 encePairwiseOnDemand]: 92/104 looper letters, 30 selfloop transitions, 6 changer transitions 0/97 dead transitions. [2023-11-24 21:43:06,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 97 transitions, 269 flow [2023-11-24 21:43:06,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:06,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:06,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 228 transitions. [2023-11-24 21:43:06,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7307692307692307 [2023-11-24 21:43:06,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 228 transitions. [2023-11-24 21:43:06,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 228 transitions. [2023-11-24 21:43:06,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:06,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 228 transitions. [2023-11-24 21:43:06,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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) [2023-11-24 21:43:06,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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) [2023-11-24 21:43:06,757 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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) [2023-11-24 21:43:06,759 INFO L175 Difference]: Start difference. First operand has 106 places, 103 transitions, 209 flow. Second operand 3 states and 228 transitions. [2023-11-24 21:43:06,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 97 transitions, 269 flow [2023-11-24 21:43:06,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 97 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:43:06,767 INFO L231 Difference]: Finished difference. Result has 101 places, 97 transitions, 208 flow [2023-11-24 21:43:06,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2023-11-24 21:43:06,773 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -5 predicate places. [2023-11-24 21:43:06,773 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 208 flow [2023-11-24 21:43:06,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 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) [2023-11-24 21:43:06,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:06,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:43:06,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:43:06,775 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-24 21:43:06,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:06,775 INFO L85 PathProgramCache]: Analyzing trace with hash 512840, now seen corresponding path program 1 times [2023-11-24 21:43:06,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:06,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746692349] [2023-11-24 21:43:06,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:06,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:06,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:06,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746692349] [2023-11-24 21:43:06,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746692349] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:06,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:06,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:06,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456201757] [2023-11-24 21:43:06,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:06,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:06,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:06,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:06,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:07,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 104 [2023-11-24 21:43:07,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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) [2023-11-24 21:43:07,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:07,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 104 [2023-11-24 21:43:07,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:07,258 INFO L124 PetriNetUnfolderBase]: 64/286 cut-off events. [2023-11-24 21:43:07,258 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-24 21:43:07,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 286 events. 64/286 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1300 event pairs, 63 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 413. Up to 157 conditions per place. [2023-11-24 21:43:07,263 INFO L140 encePairwiseOnDemand]: 92/104 looper letters, 27 selfloop transitions, 6 changer transitions 0/91 dead transitions. [2023-11-24 21:43:07,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 91 transitions, 262 flow [2023-11-24 21:43:07,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:07,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:07,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2023-11-24 21:43:07,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.75 [2023-11-24 21:43:07,266 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2023-11-24 21:43:07,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2023-11-24 21:43:07,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:07,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2023-11-24 21:43:07,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 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) [2023-11-24 21:43:07,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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) [2023-11-24 21:43:07,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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) [2023-11-24 21:43:07,272 INFO L175 Difference]: Start difference. First operand has 101 places, 97 transitions, 208 flow. Second operand 3 states and 234 transitions. [2023-11-24 21:43:07,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 91 transitions, 262 flow [2023-11-24 21:43:07,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 91 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:07,276 INFO L231 Difference]: Finished difference. Result has 95 places, 91 transitions, 196 flow [2023-11-24 21:43:07,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=95, PETRI_TRANSITIONS=91} [2023-11-24 21:43:07,277 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -11 predicate places. [2023-11-24 21:43:07,277 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 91 transitions, 196 flow [2023-11-24 21:43:07,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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) [2023-11-24 21:43:07,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:07,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:43:07,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:43:07,278 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-24 21:43:07,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:07,279 INFO L85 PathProgramCache]: Analyzing trace with hash 492854477, now seen corresponding path program 1 times [2023-11-24 21:43:07,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:07,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473323705] [2023-11-24 21:43:07,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:07,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:07,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:07,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473323705] [2023-11-24 21:43:07,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473323705] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:07,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:07,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:43:07,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308962943] [2023-11-24 21:43:07,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:07,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:43:07,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:07,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:43:07,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:07,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 104 [2023-11-24 21:43:07,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 91 transitions, 196 flow. Second operand has 6 states, 6 states have (on average 61.833333333333336) internal successors, (371), 6 states have internal predecessors, (371), 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) [2023-11-24 21:43:07,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:07,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 104 [2023-11-24 21:43:07,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:08,019 INFO L124 PetriNetUnfolderBase]: 77/338 cut-off events. [2023-11-24 21:43:08,020 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:43:08,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 338 events. 77/338 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1628 event pairs, 55 based on Foata normal form. 1/267 useless extension candidates. Maximal degree in co-relation 502. Up to 143 conditions per place. [2023-11-24 21:43:08,028 INFO L140 encePairwiseOnDemand]: 95/104 looper letters, 49 selfloop transitions, 3 changer transitions 0/100 dead transitions. [2023-11-24 21:43:08,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 100 transitions, 318 flow [2023-11-24 21:43:08,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:08,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:43:08,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 302 transitions. [2023-11-24 21:43:08,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7259615384615384 [2023-11-24 21:43:08,035 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 302 transitions. [2023-11-24 21:43:08,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 302 transitions. [2023-11-24 21:43:08,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:08,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 302 transitions. [2023-11-24 21:43:08,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 75.5) internal successors, (302), 4 states have internal predecessors, (302), 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) [2023-11-24 21:43:08,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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) [2023-11-24 21:43:08,043 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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) [2023-11-24 21:43:08,043 INFO L175 Difference]: Start difference. First operand has 95 places, 91 transitions, 196 flow. Second operand 4 states and 302 transitions. [2023-11-24 21:43:08,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 100 transitions, 318 flow [2023-11-24 21:43:08,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 100 transitions, 306 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:08,050 INFO L231 Difference]: Finished difference. Result has 93 places, 87 transitions, 191 flow [2023-11-24 21:43:08,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=191, PETRI_PLACES=93, PETRI_TRANSITIONS=87} [2023-11-24 21:43:08,053 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -13 predicate places. [2023-11-24 21:43:08,053 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 87 transitions, 191 flow [2023-11-24 21:43:08,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 61.833333333333336) internal successors, (371), 6 states have internal predecessors, (371), 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) [2023-11-24 21:43:08,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:08,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:43:08,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:43:08,055 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-24 21:43:08,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:08,057 INFO L85 PathProgramCache]: Analyzing trace with hash 492854478, now seen corresponding path program 1 times [2023-11-24 21:43:08,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:08,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126694834] [2023-11-24 21:43:08,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:08,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:08,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:08,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:08,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126694834] [2023-11-24 21:43:08,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126694834] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:08,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:08,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:08,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905811796] [2023-11-24 21:43:08,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:08,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:43:08,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:08,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:43:08,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:43:08,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 104 [2023-11-24 21:43:08,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 87 transitions, 191 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 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) [2023-11-24 21:43:08,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:08,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 104 [2023-11-24 21:43:08,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:08,906 INFO L124 PetriNetUnfolderBase]: 68/322 cut-off events. [2023-11-24 21:43:08,907 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-24 21:43:08,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 322 events. 68/322 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1443 event pairs, 67 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 448. Up to 178 conditions per place. [2023-11-24 21:43:08,911 INFO L140 encePairwiseOnDemand]: 95/104 looper letters, 38 selfloop transitions, 6 changer transitions 0/94 dead transitions. [2023-11-24 21:43:08,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 94 transitions, 293 flow [2023-11-24 21:43:08,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:08,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:43:08,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 274 transitions. [2023-11-24 21:43:08,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6586538461538461 [2023-11-24 21:43:08,914 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 274 transitions. [2023-11-24 21:43:08,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 274 transitions. [2023-11-24 21:43:08,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:08,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 274 transitions. [2023-11-24 21:43:08,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 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) [2023-11-24 21:43:08,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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) [2023-11-24 21:43:08,917 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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) [2023-11-24 21:43:08,918 INFO L175 Difference]: Start difference. First operand has 93 places, 87 transitions, 191 flow. Second operand 4 states and 274 transitions. [2023-11-24 21:43:08,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 94 transitions, 293 flow [2023-11-24 21:43:08,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 94 transitions, 291 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:43:08,922 INFO L231 Difference]: Finished difference. Result has 97 places, 92 transitions, 237 flow [2023-11-24 21:43:08,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=237, PETRI_PLACES=97, PETRI_TRANSITIONS=92} [2023-11-24 21:43:08,924 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -9 predicate places. [2023-11-24 21:43:08,925 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 92 transitions, 237 flow [2023-11-24 21:43:08,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 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) [2023-11-24 21:43:08,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:08,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:08,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:43:08,926 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-24 21:43:08,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:08,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1977986263, now seen corresponding path program 1 times [2023-11-24 21:43:08,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:08,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236787664] [2023-11-24 21:43:08,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:08,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:09,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:09,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236787664] [2023-11-24 21:43:09,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236787664] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:09,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:09,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:43:09,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028864511] [2023-11-24 21:43:09,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:09,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:43:09,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:09,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:43:09,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:43:09,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 104 [2023-11-24 21:43:09,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 92 transitions, 237 flow. Second operand has 7 states, 7 states have (on average 54.285714285714285) internal successors, (380), 7 states have internal predecessors, (380), 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) [2023-11-24 21:43:09,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:09,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 104 [2023-11-24 21:43:09,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:09,972 INFO L124 PetriNetUnfolderBase]: 67/314 cut-off events. [2023-11-24 21:43:09,972 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-24 21:43:09,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 564 conditions, 314 events. 67/314 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1384 event pairs, 66 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 519. Up to 167 conditions per place. [2023-11-24 21:43:09,975 INFO L140 encePairwiseOnDemand]: 88/104 looper letters, 30 selfloop transitions, 17 changer transitions 0/88 dead transitions. [2023-11-24 21:43:09,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 88 transitions, 323 flow [2023-11-24 21:43:09,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:43:09,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-24 21:43:09,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 469 transitions. [2023-11-24 21:43:09,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637019230769231 [2023-11-24 21:43:09,978 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 469 transitions. [2023-11-24 21:43:09,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 469 transitions. [2023-11-24 21:43:09,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:09,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 469 transitions. [2023-11-24 21:43:09,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 58.625) internal successors, (469), 8 states have internal predecessors, (469), 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) [2023-11-24 21:43:09,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 104.0) internal successors, (936), 9 states have internal predecessors, (936), 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) [2023-11-24 21:43:09,986 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 104.0) internal successors, (936), 9 states have internal predecessors, (936), 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) [2023-11-24 21:43:09,986 INFO L175 Difference]: Start difference. First operand has 97 places, 92 transitions, 237 flow. Second operand 8 states and 469 transitions. [2023-11-24 21:43:09,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 88 transitions, 323 flow [2023-11-24 21:43:09,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 88 transitions, 321 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:43:09,992 INFO L231 Difference]: Finished difference. Result has 99 places, 88 transitions, 261 flow [2023-11-24 21:43:09,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=261, PETRI_PLACES=99, PETRI_TRANSITIONS=88} [2023-11-24 21:43:09,995 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -7 predicate places. [2023-11-24 21:43:09,996 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 88 transitions, 261 flow [2023-11-24 21:43:09,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.285714285714285) internal successors, (380), 7 states have internal predecessors, (380), 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) [2023-11-24 21:43:09,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:09,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:09,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:43:09,997 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-24 21:43:09,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:09,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1977986262, now seen corresponding path program 1 times [2023-11-24 21:43:09,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:09,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483182271] [2023-11-24 21:43:09,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:09,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:10,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:10,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483182271] [2023-11-24 21:43:10,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483182271] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:10,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:10,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:43:10,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504688468] [2023-11-24 21:43:10,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:10,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:43:10,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:10,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:43:10,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:10,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 104 [2023-11-24 21:43:10,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 88 transitions, 261 flow. Second operand has 6 states, 6 states have (on average 60.166666666666664) internal successors, (361), 6 states have internal predecessors, (361), 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) [2023-11-24 21:43:10,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:10,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 104 [2023-11-24 21:43:10,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:11,005 INFO L124 PetriNetUnfolderBase]: 67/310 cut-off events. [2023-11-24 21:43:11,005 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-11-24 21:43:11,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 310 events. 67/310 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1403 event pairs, 66 based on Foata normal form. 2/253 useless extension candidates. Maximal degree in co-relation 508. Up to 171 conditions per place. [2023-11-24 21:43:11,008 INFO L140 encePairwiseOnDemand]: 94/104 looper letters, 30 selfloop transitions, 13 changer transitions 0/86 dead transitions. [2023-11-24 21:43:11,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 86 transitions, 343 flow [2023-11-24 21:43:11,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:43:11,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-24 21:43:11,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 452 transitions. [2023-11-24 21:43:11,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208791208791209 [2023-11-24 21:43:11,011 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 452 transitions. [2023-11-24 21:43:11,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 452 transitions. [2023-11-24 21:43:11,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:11,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 452 transitions. [2023-11-24 21:43:11,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 64.57142857142857) internal successors, (452), 7 states have internal predecessors, (452), 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) [2023-11-24 21:43:11,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 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) [2023-11-24 21:43:11,016 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 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) [2023-11-24 21:43:11,017 INFO L175 Difference]: Start difference. First operand has 99 places, 88 transitions, 261 flow. Second operand 7 states and 452 transitions. [2023-11-24 21:43:11,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 86 transitions, 343 flow [2023-11-24 21:43:11,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 86 transitions, 309 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-24 21:43:11,023 INFO L231 Difference]: Finished difference. Result has 96 places, 86 transitions, 249 flow [2023-11-24 21:43:11,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=249, PETRI_PLACES=96, PETRI_TRANSITIONS=86} [2023-11-24 21:43:11,027 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -10 predicate places. [2023-11-24 21:43:11,027 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 86 transitions, 249 flow [2023-11-24 21:43:11,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.166666666666664) internal successors, (361), 6 states have internal predecessors, (361), 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) [2023-11-24 21:43:11,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:11,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:11,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:43:11,028 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-24 21:43:11,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:11,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1825731198, now seen corresponding path program 1 times [2023-11-24 21:43:11,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:11,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461959133] [2023-11-24 21:43:11,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:11,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:11,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:11,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461959133] [2023-11-24 21:43:11,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461959133] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:11,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:11,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:43:11,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198693567] [2023-11-24 21:43:11,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:11,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:43:11,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:11,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:43:11,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:43:11,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 104 [2023-11-24 21:43:11,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 86 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 61.0) internal successors, (305), 5 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:11,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:11,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 104 [2023-11-24 21:43:11,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:11,519 INFO L124 PetriNetUnfolderBase]: 67/308 cut-off events. [2023-11-24 21:43:11,519 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-24 21:43:11,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 567 conditions, 308 events. 67/308 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1386 event pairs, 66 based on Foata normal form. 2/249 useless extension candidates. Maximal degree in co-relation 503. Up to 171 conditions per place. [2023-11-24 21:43:11,522 INFO L140 encePairwiseOnDemand]: 95/104 looper letters, 31 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2023-11-24 21:43:11,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 85 transitions, 335 flow [2023-11-24 21:43:11,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:43:11,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:43:11,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 334 transitions. [2023-11-24 21:43:11,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6423076923076924 [2023-11-24 21:43:11,528 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 334 transitions. [2023-11-24 21:43:11,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 334 transitions. [2023-11-24 21:43:11,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:11,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 334 transitions. [2023-11-24 21:43:11,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 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) [2023-11-24 21:43:11,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 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) [2023-11-24 21:43:11,557 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 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) [2023-11-24 21:43:11,557 INFO L175 Difference]: Start difference. First operand has 96 places, 86 transitions, 249 flow. Second operand 5 states and 334 transitions. [2023-11-24 21:43:11,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 85 transitions, 335 flow [2023-11-24 21:43:11,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 85 transitions, 309 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-24 21:43:11,562 INFO L231 Difference]: Finished difference. Result has 93 places, 85 transitions, 247 flow [2023-11-24 21:43:11,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=247, PETRI_PLACES=93, PETRI_TRANSITIONS=85} [2023-11-24 21:43:11,563 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -13 predicate places. [2023-11-24 21:43:11,564 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 85 transitions, 247 flow [2023-11-24 21:43:11,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.0) internal successors, (305), 5 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:11,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:11,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:11,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:43:11,565 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-24 21:43:11,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:11,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1825731199, now seen corresponding path program 1 times [2023-11-24 21:43:11,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:11,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842181334] [2023-11-24 21:43:11,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:11,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:11,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:11,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:11,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:11,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842181334] [2023-11-24 21:43:11,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842181334] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:11,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:11,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:43:11,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52716546] [2023-11-24 21:43:11,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:11,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:43:11,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:11,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:43:11,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:43:12,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 104 [2023-11-24 21:43:12,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 85 transitions, 247 flow. Second operand has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 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) [2023-11-24 21:43:12,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:12,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 104 [2023-11-24 21:43:12,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:12,227 INFO L124 PetriNetUnfolderBase]: 67/306 cut-off events. [2023-11-24 21:43:12,228 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-11-24 21:43:12,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 560 conditions, 306 events. 67/306 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1365 event pairs, 66 based on Foata normal form. 2/247 useless extension candidates. Maximal degree in co-relation 500. Up to 171 conditions per place. [2023-11-24 21:43:12,230 INFO L140 encePairwiseOnDemand]: 95/104 looper letters, 28 selfloop transitions, 13 changer transitions 0/84 dead transitions. [2023-11-24 21:43:12,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 84 transitions, 327 flow [2023-11-24 21:43:12,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:43:12,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:43:12,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 346 transitions. [2023-11-24 21:43:12,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6653846153846154 [2023-11-24 21:43:12,233 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 346 transitions. [2023-11-24 21:43:12,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 346 transitions. [2023-11-24 21:43:12,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:12,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 346 transitions. [2023-11-24 21:43:12,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.2) internal successors, (346), 5 states have internal predecessors, (346), 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) [2023-11-24 21:43:12,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 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) [2023-11-24 21:43:12,237 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 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) [2023-11-24 21:43:12,237 INFO L175 Difference]: Start difference. First operand has 93 places, 85 transitions, 247 flow. Second operand 5 states and 346 transitions. [2023-11-24 21:43:12,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 84 transitions, 327 flow [2023-11-24 21:43:12,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 84 transitions, 301 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:43:12,241 INFO L231 Difference]: Finished difference. Result has 92 places, 84 transitions, 245 flow [2023-11-24 21:43:12,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=245, PETRI_PLACES=92, PETRI_TRANSITIONS=84} [2023-11-24 21:43:12,242 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -14 predicate places. [2023-11-24 21:43:12,242 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 84 transitions, 245 flow [2023-11-24 21:43:12,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 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) [2023-11-24 21:43:12,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:12,243 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:12,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:43:12,243 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-24 21:43:12,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:12,244 INFO L85 PathProgramCache]: Analyzing trace with hash 36831304, now seen corresponding path program 1 times [2023-11-24 21:43:12,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:12,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845495841] [2023-11-24 21:43:12,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:12,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:12,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:12,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845495841] [2023-11-24 21:43:12,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845495841] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:12,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884727961] [2023-11-24 21:43:12,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:12,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:12,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:12,673 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:12,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:43:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:12,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-24 21:43:12,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:13,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:13,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:43:13,115 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:43:13,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-24 21:43:13,143 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 21:43:13,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-24 21:43:13,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:13,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:43:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:13,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:13,828 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:43:13,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-24 21:43:14,077 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-24 21:43:14,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-24 21:43:14,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:14,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884727961] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:14,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:43:14,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 16 [2023-11-24 21:43:14,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003066911] [2023-11-24 21:43:14,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:14,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-24 21:43:14,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:14,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-24 21:43:14,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-11-24 21:43:17,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 104 [2023-11-24 21:43:17,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 84 transitions, 245 flow. Second operand has 18 states, 18 states have (on average 57.833333333333336) internal successors, (1041), 18 states have internal predecessors, (1041), 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) [2023-11-24 21:43:17,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:17,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 104 [2023-11-24 21:43:17,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:18,586 INFO L124 PetriNetUnfolderBase]: 79/363 cut-off events. [2023-11-24 21:43:18,587 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-11-24 21:43:18,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 363 events. 79/363 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1676 event pairs, 76 based on Foata normal form. 6/302 useless extension candidates. Maximal degree in co-relation 554. Up to 193 conditions per place. [2023-11-24 21:43:18,590 INFO L140 encePairwiseOnDemand]: 95/104 looper letters, 47 selfloop transitions, 16 changer transitions 0/104 dead transitions. [2023-11-24 21:43:18,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 104 transitions, 475 flow [2023-11-24 21:43:18,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:43:18,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-24 21:43:18,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 573 transitions. [2023-11-24 21:43:18,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6121794871794872 [2023-11-24 21:43:18,594 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 573 transitions. [2023-11-24 21:43:18,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 573 transitions. [2023-11-24 21:43:18,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:18,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 573 transitions. [2023-11-24 21:43:18,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 63.666666666666664) internal successors, (573), 9 states have internal predecessors, (573), 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) [2023-11-24 21:43:18,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 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) [2023-11-24 21:43:18,601 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 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) [2023-11-24 21:43:18,601 INFO L175 Difference]: Start difference. First operand has 92 places, 84 transitions, 245 flow. Second operand 9 states and 573 transitions. [2023-11-24 21:43:18,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 104 transitions, 475 flow [2023-11-24 21:43:18,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 104 transitions, 413 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:43:18,609 INFO L231 Difference]: Finished difference. Result has 100 places, 92 transitions, 323 flow [2023-11-24 21:43:18,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=323, PETRI_PLACES=100, PETRI_TRANSITIONS=92} [2023-11-24 21:43:18,610 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -6 predicate places. [2023-11-24 21:43:18,610 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 92 transitions, 323 flow [2023-11-24 21:43:18,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.833333333333336) internal successors, (1041), 18 states have internal predecessors, (1041), 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) [2023-11-24 21:43:18,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:18,611 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-24 21:43:18,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-24 21:43:18,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:18,818 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-24 21:43:18,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:18,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1754320960, now seen corresponding path program 1 times [2023-11-24 21:43:18,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:18,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154495661] [2023-11-24 21:43:18,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:18,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:19,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:19,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154495661] [2023-11-24 21:43:19,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154495661] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:19,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726788784] [2023-11-24 21:43:19,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:19,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:19,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:19,008 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:19,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:43:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:19,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:43:19,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:19,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:19,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726788784] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:19,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:43:19,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-24 21:43:19,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152196209] [2023-11-24 21:43:19,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:19,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:43:19,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:19,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:43:19,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:43:19,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 104 [2023-11-24 21:43:19,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 92 transitions, 323 flow. Second operand has 8 states, 8 states have (on average 75.125) internal successors, (601), 8 states have internal predecessors, (601), 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) [2023-11-24 21:43:19,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:19,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 104 [2023-11-24 21:43:19,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:19,687 INFO L124 PetriNetUnfolderBase]: 67/347 cut-off events. [2023-11-24 21:43:19,688 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2023-11-24 21:43:19,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692 conditions, 347 events. 67/347 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1309 event pairs, 66 based on Foata normal form. 4/291 useless extension candidates. Maximal degree in co-relation 573. Up to 166 conditions per place. [2023-11-24 21:43:19,692 INFO L140 encePairwiseOnDemand]: 100/104 looper letters, 62 selfloop transitions, 8 changer transitions 0/114 dead transitions. [2023-11-24 21:43:19,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 114 transitions, 559 flow [2023-11-24 21:43:19,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:43:19,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-24 21:43:19,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 641 transitions. [2023-11-24 21:43:19,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7704326923076923 [2023-11-24 21:43:19,696 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 641 transitions. [2023-11-24 21:43:19,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 641 transitions. [2023-11-24 21:43:19,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:19,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 641 transitions. [2023-11-24 21:43:19,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 80.125) internal successors, (641), 8 states have internal predecessors, (641), 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) [2023-11-24 21:43:19,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 104.0) internal successors, (936), 9 states have internal predecessors, (936), 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) [2023-11-24 21:43:19,703 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 104.0) internal successors, (936), 9 states have internal predecessors, (936), 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) [2023-11-24 21:43:19,703 INFO L175 Difference]: Start difference. First operand has 100 places, 92 transitions, 323 flow. Second operand 8 states and 641 transitions. [2023-11-24 21:43:19,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 114 transitions, 559 flow [2023-11-24 21:43:19,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 114 transitions, 539 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:19,710 INFO L231 Difference]: Finished difference. Result has 108 places, 93 transitions, 339 flow [2023-11-24 21:43:19,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=339, PETRI_PLACES=108, PETRI_TRANSITIONS=93} [2023-11-24 21:43:19,712 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 2 predicate places. [2023-11-24 21:43:19,712 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 93 transitions, 339 flow [2023-11-24 21:43:19,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 75.125) internal successors, (601), 8 states have internal predecessors, (601), 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) [2023-11-24 21:43:19,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:19,713 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1] [2023-11-24 21:43:19,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:19,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 21:43:19,921 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-24 21:43:19,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:19,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1348859978, now seen corresponding path program 2 times [2023-11-24 21:43:19,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:19,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080860879] [2023-11-24 21:43:19,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:19,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:22,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:22,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080860879] [2023-11-24 21:43:22,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080860879] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:22,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096757995] [2023-11-24 21:43:22,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:43:22,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:22,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:22,542 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:22,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:43:22,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:43:22,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:43:22,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-24 21:43:22,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:22,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:22,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:43:23,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:23,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:43:23,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:23,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:43:23,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:23,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:43:23,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:23,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:43:23,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:23,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:43:23,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:23,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:43:23,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:23,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:43:23,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:43:23,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:43:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:23,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:24,003 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:43:24,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-24 21:43:24,155 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-24 21:43:24,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-24 21:43:24,575 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:43:24,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-24 21:43:24,759 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-24 21:43:24,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-24 21:43:25,272 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:43:25,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-24 21:43:25,419 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-24 21:43:25,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-24 21:43:25,922 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:43:25,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-24 21:43:26,157 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-24 21:43:26,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-24 21:43:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:26,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096757995] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:26,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:43:26,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 33 [2023-11-24 21:43:26,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143099578] [2023-11-24 21:43:26,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:26,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-24 21:43:26,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:26,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-24 21:43:26,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2023-11-24 21:43:44,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 104 [2023-11-24 21:43:44,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 93 transitions, 339 flow. Second operand has 35 states, 35 states have (on average 58.74285714285714) internal successors, (2056), 35 states have internal predecessors, (2056), 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) [2023-11-24 21:43:44,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:44,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 104 [2023-11-24 21:43:44,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:46,837 INFO L124 PetriNetUnfolderBase]: 81/425 cut-off events. [2023-11-24 21:43:46,837 INFO L125 PetriNetUnfolderBase]: For 272/272 co-relation queries the response was YES. [2023-11-24 21:43:46,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 921 conditions, 425 events. 81/425 cut-off events. For 272/272 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1735 event pairs, 76 based on Foata normal form. 6/367 useless extension candidates. Maximal degree in co-relation 807. Up to 195 conditions per place. [2023-11-24 21:43:46,841 INFO L140 encePairwiseOnDemand]: 96/104 looper letters, 87 selfloop transitions, 20 changer transitions 0/148 dead transitions. [2023-11-24 21:43:46,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 148 transitions, 887 flow [2023-11-24 21:43:46,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:43:46,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-24 21:43:46,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 840 transitions. [2023-11-24 21:43:46,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.621301775147929 [2023-11-24 21:43:46,846 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 840 transitions. [2023-11-24 21:43:46,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 840 transitions. [2023-11-24 21:43:46,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:46,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 840 transitions. [2023-11-24 21:43:46,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 64.61538461538461) internal successors, (840), 13 states have internal predecessors, (840), 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) [2023-11-24 21:43:46,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 104.0) internal successors, (1456), 14 states have internal predecessors, (1456), 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) [2023-11-24 21:43:46,855 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 104.0) internal successors, (1456), 14 states have internal predecessors, (1456), 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) [2023-11-24 21:43:46,855 INFO L175 Difference]: Start difference. First operand has 108 places, 93 transitions, 339 flow. Second operand 13 states and 840 transitions. [2023-11-24 21:43:46,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 148 transitions, 887 flow [2023-11-24 21:43:46,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 148 transitions, 871 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-24 21:43:46,863 INFO L231 Difference]: Finished difference. Result has 126 places, 106 transitions, 553 flow [2023-11-24 21:43:46,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=553, PETRI_PLACES=126, PETRI_TRANSITIONS=106} [2023-11-24 21:43:46,864 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 20 predicate places. [2023-11-24 21:43:46,864 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 106 transitions, 553 flow [2023-11-24 21:43:46,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 58.74285714285714) internal successors, (2056), 35 states have internal predecessors, (2056), 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) [2023-11-24 21:43:46,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:46,866 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2023-11-24 21:43:46,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:47,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-24 21:43:47,112 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-24 21:43:47,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:47,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1578109144, now seen corresponding path program 2 times [2023-11-24 21:43:47,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:47,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677813376] [2023-11-24 21:43:47,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:47,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:47,680 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:47,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:47,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677813376] [2023-11-24 21:43:47,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677813376] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:47,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439358962] [2023-11-24 21:43:47,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:43:47,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:47,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:47,682 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:47,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:43:48,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:43:48,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:43:48,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 1298 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 21:43:48,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:48,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:48,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439358962] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:48,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:43:48,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2023-11-24 21:43:48,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680587509] [2023-11-24 21:43:48,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:48,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 21:43:48,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:48,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 21:43:48,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:43:48,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 104 [2023-11-24 21:43:48,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 106 transitions, 553 flow. Second operand has 13 states, 13 states have (on average 76.84615384615384) internal successors, (999), 13 states have internal predecessors, (999), 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) [2023-11-24 21:43:48,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:48,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 104 [2023-11-24 21:43:48,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:48,788 INFO L124 PetriNetUnfolderBase]: 67/389 cut-off events. [2023-11-24 21:43:48,789 INFO L125 PetriNetUnfolderBase]: For 466/466 co-relation queries the response was YES. [2023-11-24 21:43:48,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 902 conditions, 389 events. 67/389 cut-off events. For 466/466 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1313 event pairs, 66 based on Foata normal form. 4/333 useless extension candidates. Maximal degree in co-relation 768. Up to 166 conditions per place. [2023-11-24 21:43:48,792 INFO L140 encePairwiseOnDemand]: 100/104 looper letters, 87 selfloop transitions, 12 changer transitions 0/143 dead transitions. [2023-11-24 21:43:48,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 143 transitions, 929 flow [2023-11-24 21:43:48,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:43:48,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-24 21:43:48,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 953 transitions. [2023-11-24 21:43:48,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7636217948717948 [2023-11-24 21:43:48,796 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 953 transitions. [2023-11-24 21:43:48,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 953 transitions. [2023-11-24 21:43:48,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:48,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 953 transitions. [2023-11-24 21:43:48,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 79.41666666666667) internal successors, (953), 12 states have internal predecessors, (953), 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) [2023-11-24 21:43:48,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 104.0) internal successors, (1352), 13 states have internal predecessors, (1352), 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) [2023-11-24 21:43:48,805 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 104.0) internal successors, (1352), 13 states have internal predecessors, (1352), 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) [2023-11-24 21:43:48,805 INFO L175 Difference]: Start difference. First operand has 126 places, 106 transitions, 553 flow. Second operand 12 states and 953 transitions. [2023-11-24 21:43:48,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 143 transitions, 929 flow [2023-11-24 21:43:48,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 143 transitions, 891 flow, removed 13 selfloop flow, removed 6 redundant places. [2023-11-24 21:43:48,818 INFO L231 Difference]: Finished difference. Result has 132 places, 103 transitions, 496 flow [2023-11-24 21:43:48,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=496, PETRI_PLACES=132, PETRI_TRANSITIONS=103} [2023-11-24 21:43:48,822 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 26 predicate places. [2023-11-24 21:43:48,822 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 103 transitions, 496 flow [2023-11-24 21:43:48,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 76.84615384615384) internal successors, (999), 13 states have internal predecessors, (999), 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) [2023-11-24 21:43:48,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:48,823 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1] [2023-11-24 21:43:48,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:43:49,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89abaed-1cce-404e-8411-7c6575fd92ea/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-24 21:43:49,031 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-24 21:43:49,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:49,031 INFO L85 PathProgramCache]: Analyzing trace with hash 131619090, now seen corresponding path program 3 times [2023-11-24 21:43:49,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:49,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037816046] [2023-11-24 21:43:49,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:49,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 490 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:49,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:49,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037816046] [2023-11-24 21:43:49,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037816046] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:49,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:49,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-24 21:43:49,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043006695] [2023-11-24 21:43:49,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:49,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 21:43:49,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:49,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 21:43:49,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:43:49,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 104 [2023-11-24 21:43:49,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 103 transitions, 496 flow. Second operand has 13 states, 13 states have (on average 76.61538461538461) internal successors, (996), 13 states have internal predecessors, (996), 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) [2023-11-24 21:43:49,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:49,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 104 [2023-11-24 21:43:49,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:50,434 INFO L124 PetriNetUnfolderBase]: 66/384 cut-off events. [2023-11-24 21:43:50,435 INFO L125 PetriNetUnfolderBase]: For 419/419 co-relation queries the response was YES. [2023-11-24 21:43:50,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 870 conditions, 384 events. 66/384 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1304 event pairs, 66 based on Foata normal form. 1/325 useless extension candidates. Maximal degree in co-relation 746. Up to 165 conditions per place. [2023-11-24 21:43:50,438 INFO L140 encePairwiseOnDemand]: 100/104 looper letters, 85 selfloop transitions, 12 changer transitions 0/140 dead transitions. [2023-11-24 21:43:50,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 140 transitions, 877 flow [2023-11-24 21:43:50,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:43:50,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-24 21:43:50,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1020 transitions. [2023-11-24 21:43:50,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7544378698224852 [2023-11-24 21:43:50,443 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1020 transitions. [2023-11-24 21:43:50,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1020 transitions. [2023-11-24 21:43:50,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:50,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1020 transitions. [2023-11-24 21:43:50,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 78.46153846153847) internal successors, (1020), 13 states have internal predecessors, (1020), 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) [2023-11-24 21:43:50,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 104.0) internal successors, (1456), 14 states have internal predecessors, (1456), 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) [2023-11-24 21:43:50,452 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 104.0) internal successors, (1456), 14 states have internal predecessors, (1456), 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) [2023-11-24 21:43:50,452 INFO L175 Difference]: Start difference. First operand has 132 places, 103 transitions, 496 flow. Second operand 13 states and 1020 transitions. [2023-11-24 21:43:50,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 140 transitions, 877 flow [2023-11-24 21:43:50,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 140 transitions, 797 flow, removed 14 selfloop flow, removed 20 redundant places. [2023-11-24 21:43:50,460 INFO L231 Difference]: Finished difference. Result has 123 places, 100 transitions, 410 flow [2023-11-24 21:43:50,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=410, PETRI_PLACES=123, PETRI_TRANSITIONS=100} [2023-11-24 21:43:50,462 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 17 predicate places. [2023-11-24 21:43:50,462 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 100 transitions, 410 flow [2023-11-24 21:43:50,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 76.61538461538461) internal successors, (996), 13 states have internal predecessors, (996), 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) [2023-11-24 21:43:50,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:50,463 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2023-11-24 21:43:50,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:43:50,464 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-24 21:43:50,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:50,467 INFO L85 PathProgramCache]: Analyzing trace with hash 131601936, now seen corresponding path program 3 times [2023-11-24 21:43:50,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:50,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538486273] [2023-11-24 21:43:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:50,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat