./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/queue.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_9bd74a92-3027-433f-9804-28684d9c1b54/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd74a92-3027-433f-9804-28684d9c1b54/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd74a92-3027-433f-9804-28684d9c1b54/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd74a92-3027-433f-9804-28684d9c1b54/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/queue.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd74a92-3027-433f-9804-28684d9c1b54/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd74a92-3027-433f-9804-28684d9c1b54/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:49:42,108 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:49:42,228 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd74a92-3027-433f-9804-28684d9c1b54/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 10:49:42,235 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:49:42,236 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:49:42,272 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:49:42,274 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:49:42,275 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:49:42,276 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:49:42,281 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:49:42,281 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:49:42,283 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:49:42,284 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:49:42,285 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:49:42,286 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:49:42,287 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:49:42,287 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:49:42,287 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:49:42,288 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:49:42,289 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:49:42,289 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 10:49:42,290 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 10:49:42,290 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 10:49:42,291 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:49:42,291 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 10:49:42,292 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 10:49:42,293 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:49:42,293 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:49:42,294 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:49:42,295 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:49:42,296 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:49:42,296 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:49:42,297 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:49:42,297 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:49:42,297 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:49:42,298 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:49:42,298 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:49:42,298 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:49:42,299 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:49:42,299 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:49:42,299 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:49:42,300 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_9bd74a92-3027-433f-9804-28684d9c1b54/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd74a92-3027-433f-9804-28684d9c1b54/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 [2023-11-26 10:49:42,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:49:42,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:49:42,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:49:42,616 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:49:42,617 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:49:42,618 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd74a92-3027-433f-9804-28684d9c1b54/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/pthread/queue.i [2023-11-26 10:49:45,722 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:49:46,024 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:49:46,024 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd74a92-3027-433f-9804-28684d9c1b54/sv-benchmarks/c/pthread/queue.i [2023-11-26 10:49:46,057 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd74a92-3027-433f-9804-28684d9c1b54/bin/uautomizer-verify-VRDe98Ueme/data/49ea62a8e/bd3933352b4f43ac9a978b1ee9b87180/FLAG7b3090c05 [2023-11-26 10:49:46,072 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd74a92-3027-433f-9804-28684d9c1b54/bin/uautomizer-verify-VRDe98Ueme/data/49ea62a8e/bd3933352b4f43ac9a978b1ee9b87180 [2023-11-26 10:49:46,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:49:46,077 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:49:46,078 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:49:46,078 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:49:46,084 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:49:46,085 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:49:46" (1/1) ... [2023-11-26 10:49:46,086 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62659750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:46, skipping insertion in model container [2023-11-26 10:49:46,086 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:49:46" (1/1) ... [2023-11-26 10:49:46,164 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:49:46,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:49:46,809 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:49:46,864 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:49:46,930 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:49:46,930 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:46 WrapperNode [2023-11-26 10:49:46,930 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:49:46,931 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:49:46,944 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:49:46,944 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:49:46,958 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:46" (1/1) ... [2023-11-26 10:49:46,985 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:46" (1/1) ... [2023-11-26 10:49:47,029 INFO L138 Inliner]: procedures = 275, calls = 74, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 269 [2023-11-26 10:49:47,029 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:49:47,030 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:49:47,030 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:49:47,030 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:49:47,042 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:46" (1/1) ... [2023-11-26 10:49:47,043 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:46" (1/1) ... [2023-11-26 10:49:47,049 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:46" (1/1) ... [2023-11-26 10:49:47,077 INFO L175 MemorySlicer]: Split 55 memory accesses to 7 slices as follows [2, 8, 2, 5, 4, 32, 2]. 58 percent of accesses are in the largest equivalence class. The 15 initializations are split as follows [2, 8, 0, 5, 0, 0, 0]. The 20 writes are split as follows [0, 0, 1, 0, 3, 15, 1]. [2023-11-26 10:49:47,078 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:46" (1/1) ... [2023-11-26 10:49:47,078 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:46" (1/1) ... [2023-11-26 10:49:47,093 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:46" (1/1) ... [2023-11-26 10:49:47,097 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:46" (1/1) ... [2023-11-26 10:49:47,100 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:46" (1/1) ... [2023-11-26 10:49:47,103 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:46" (1/1) ... [2023-11-26 10:49:47,109 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:49:47,110 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:49:47,110 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:49:47,110 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:49:47,111 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:46" (1/1) ... [2023-11-26 10:49:47,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:49:47,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd74a92-3027-433f-9804-28684d9c1b54/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:47,157 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd74a92-3027-433f-9804-28684d9c1b54/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:49:47,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bd74a92-3027-433f-9804-28684d9c1b54/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:49:47,206 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-26 10:49:47,206 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-26 10:49:47,207 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-26 10:49:47,207 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-26 10:49:47,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:49:47,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:49:47,207 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-26 10:49:47,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:49:47,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:49:47,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:49:47,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 10:49:47,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 10:49:47,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-26 10:49:47,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-26 10:49:47,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:49:47,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:49:47,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:49:47,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 10:49:47,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 10:49:47,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-26 10:49:47,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-26 10:49:47,210 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-26 10:49:47,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:49:47,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:49:47,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:49:47,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:49:47,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 10:49:47,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 10:49:47,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-26 10:49:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-26 10:49:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:49:47,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:49:47,213 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 10:49:47,398 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:49:47,400 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:49:48,065 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:49:48,354 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:49:48,354 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 10:49:48,355 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:49:48 BoogieIcfgContainer [2023-11-26 10:49:48,355 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:49:48,357 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:49:48,357 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:49:48,360 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:49:48,361 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:49:46" (1/3) ... [2023-11-26 10:49:48,361 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@137801e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:49:48, skipping insertion in model container [2023-11-26 10:49:48,362 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:46" (2/3) ... [2023-11-26 10:49:48,362 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@137801e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:49:48, skipping insertion in model container [2023-11-26 10:49:48,362 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:49:48" (3/3) ... [2023-11-26 10:49:48,364 INFO L112 eAbstractionObserver]: Analyzing ICFG queue.i [2023-11-26 10:49:48,384 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:49:48,384 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2023-11-26 10:49:48,384 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:49:48,530 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 10:49:48,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 185 transitions, 384 flow [2023-11-26 10:49:48,706 INFO L124 PetriNetUnfolderBase]: 14/183 cut-off events. [2023-11-26 10:49:48,707 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 10:49:48,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 183 events. 14/183 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 593 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 148. Up to 2 conditions per place. [2023-11-26 10:49:48,714 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 185 transitions, 384 flow [2023-11-26 10:49:48,723 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 182 transitions, 376 flow [2023-11-26 10:49:48,734 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:49:48,741 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;@2267b950, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:49:48,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 142 error locations. [2023-11-26 10:49:48,746 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:49:48,746 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-26 10:49:48,746 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:49:48,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:48,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-26 10:49:48,748 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:49:48,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:48,754 INFO L85 PathProgramCache]: Analyzing trace with hash 23284, now seen corresponding path program 1 times [2023-11-26 10:49:48,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:48,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349818889] [2023-11-26 10:49:48,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:48,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:49,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:49,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349818889] [2023-11-26 10:49:49,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349818889] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:49,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:49,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:49:49,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660789156] [2023-11-26 10:49:49,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:49,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:49,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:49,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:49,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:49,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 185 [2023-11-26 10:49:49,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 182 transitions, 376 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:49,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:49,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 185 [2023-11-26 10:49:49,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:50,601 INFO L124 PetriNetUnfolderBase]: 1798/4881 cut-off events. [2023-11-26 10:49:50,601 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2023-11-26 10:49:50,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7819 conditions, 4881 events. 1798/4881 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 39340 event pairs, 1437 based on Foata normal form. 184/3737 useless extension candidates. Maximal degree in co-relation 7629. Up to 2854 conditions per place. [2023-11-26 10:49:50,662 INFO L140 encePairwiseOnDemand]: 175/185 looper letters, 61 selfloop transitions, 2 changer transitions 0/166 dead transitions. [2023-11-26 10:49:50,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 166 transitions, 470 flow [2023-11-26 10:49:50,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:50,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:49:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2023-11-26 10:49:50,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7117117117117117 [2023-11-26 10:49:50,689 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2023-11-26 10:49:50,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2023-11-26 10:49:50,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:50,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2023-11-26 10:49:50,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:50,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:50,705 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:50,707 INFO L175 Difference]: Start difference. First operand has 175 places, 182 transitions, 376 flow. Second operand 3 states and 395 transitions. [2023-11-26 10:49:50,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 166 transitions, 470 flow [2023-11-26 10:49:50,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 166 transitions, 462 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 10:49:50,720 INFO L231 Difference]: Finished difference. Result has 163 places, 166 transitions, 340 flow [2023-11-26 10:49:50,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=340, PETRI_PLACES=163, PETRI_TRANSITIONS=166} [2023-11-26 10:49:50,726 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -12 predicate places. [2023-11-26 10:49:50,727 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 166 transitions, 340 flow [2023-11-26 10:49:50,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:50,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:50,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-26 10:49:50,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:49:50,728 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:49:50,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:50,729 INFO L85 PathProgramCache]: Analyzing trace with hash 23285, now seen corresponding path program 1 times [2023-11-26 10:49:50,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:50,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297217204] [2023-11-26 10:49:50,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:50,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:50,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:50,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297217204] [2023-11-26 10:49:50,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297217204] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:50,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:50,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:49:50,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286619104] [2023-11-26 10:49:50,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:50,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:50,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:50,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:50,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:51,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 185 [2023-11-26 10:49:51,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 166 transitions, 340 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:51,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:51,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 185 [2023-11-26 10:49:51,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:51,882 INFO L124 PetriNetUnfolderBase]: 1798/4878 cut-off events. [2023-11-26 10:49:51,882 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-26 10:49:51,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7767 conditions, 4878 events. 1798/4878 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 39330 event pairs, 1437 based on Foata normal form. 3/3553 useless extension candidates. Maximal degree in co-relation 7756. Up to 2854 conditions per place. [2023-11-26 10:49:51,933 INFO L140 encePairwiseOnDemand]: 180/185 looper letters, 59 selfloop transitions, 2 changer transitions 0/163 dead transitions. [2023-11-26 10:49:51,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 163 transitions, 456 flow [2023-11-26 10:49:51,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:51,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:49:51,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 394 transitions. [2023-11-26 10:49:51,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7099099099099099 [2023-11-26 10:49:51,940 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 394 transitions. [2023-11-26 10:49:51,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 394 transitions. [2023-11-26 10:49:51,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:51,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 394 transitions. [2023-11-26 10:49:51,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:51,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:51,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:51,953 INFO L175 Difference]: Start difference. First operand has 163 places, 166 transitions, 340 flow. Second operand 3 states and 394 transitions. [2023-11-26 10:49:51,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 163 transitions, 456 flow [2023-11-26 10:49:51,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 163 transitions, 452 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:49:51,962 INFO L231 Difference]: Finished difference. Result has 160 places, 163 transitions, 334 flow [2023-11-26 10:49:51,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=334, PETRI_PLACES=160, PETRI_TRANSITIONS=163} [2023-11-26 10:49:51,963 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -15 predicate places. [2023-11-26 10:49:51,963 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 163 transitions, 334 flow [2023-11-26 10:49:51,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:51,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:51,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 10:49:51,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:49:51,965 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:49:51,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:51,966 INFO L85 PathProgramCache]: Analyzing trace with hash 694365051, now seen corresponding path program 1 times [2023-11-26 10:49:51,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:51,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307637148] [2023-11-26 10:49:51,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:51,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:52,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:52,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307637148] [2023-11-26 10:49:52,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307637148] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:52,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:52,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:49:52,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621057212] [2023-11-26 10:49:52,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:52,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:49:52,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:52,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:49:52,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:49:52,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 185 [2023-11-26 10:49:52,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 163 transitions, 334 flow. Second operand has 5 states, 5 states have (on average 106.0) internal successors, (530), 5 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:52,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:52,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 185 [2023-11-26 10:49:52,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:53,277 INFO L124 PetriNetUnfolderBase]: 1798/4876 cut-off events. [2023-11-26 10:49:53,278 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-26 10:49:53,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7768 conditions, 4876 events. 1798/4876 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 39329 event pairs, 1437 based on Foata normal form. 0/3551 useless extension candidates. Maximal degree in co-relation 7755. Up to 2853 conditions per place. [2023-11-26 10:49:53,325 INFO L140 encePairwiseOnDemand]: 180/185 looper letters, 61 selfloop transitions, 3 changer transitions 0/161 dead transitions. [2023-11-26 10:49:53,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 161 transitions, 458 flow [2023-11-26 10:49:53,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:49:53,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:49:53,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 486 transitions. [2023-11-26 10:49:53,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6567567567567567 [2023-11-26 10:49:53,329 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 486 transitions. [2023-11-26 10:49:53,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 486 transitions. [2023-11-26 10:49:53,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:53,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 486 transitions. [2023-11-26 10:49:53,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:53,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:53,335 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:53,335 INFO L175 Difference]: Start difference. First operand has 160 places, 163 transitions, 334 flow. Second operand 4 states and 486 transitions. [2023-11-26 10:49:53,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 161 transitions, 458 flow [2023-11-26 10:49:53,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 161 transitions, 454 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:49:53,344 INFO L231 Difference]: Finished difference. Result has 159 places, 161 transitions, 332 flow [2023-11-26 10:49:53,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=332, PETRI_PLACES=159, PETRI_TRANSITIONS=161} [2023-11-26 10:49:53,346 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -16 predicate places. [2023-11-26 10:49:53,346 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 161 transitions, 332 flow [2023-11-26 10:49:53,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 106.0) internal successors, (530), 5 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:53,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:53,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 10:49:53,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:49:53,348 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:49:53,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:53,351 INFO L85 PathProgramCache]: Analyzing trace with hash 694365052, now seen corresponding path program 1 times [2023-11-26 10:49:53,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:53,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25291524] [2023-11-26 10:49:53,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:53,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:53,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:53,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25291524] [2023-11-26 10:49:53,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25291524] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:53,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:53,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:49:53,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529553537] [2023-11-26 10:49:53,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:53,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:49:53,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:53,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:49:53,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:49:53,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 185 [2023-11-26 10:49:53,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 161 transitions, 332 flow. Second operand has 4 states, 4 states have (on average 111.75) internal successors, (447), 4 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:53,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:53,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 185 [2023-11-26 10:49:53,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:54,467 INFO L124 PetriNetUnfolderBase]: 1798/4874 cut-off events. [2023-11-26 10:49:54,467 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-26 10:49:54,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7764 conditions, 4874 events. 1798/4874 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 39351 event pairs, 1437 based on Foata normal form. 2/3551 useless extension candidates. Maximal degree in co-relation 7749. Up to 2853 conditions per place. [2023-11-26 10:49:54,593 INFO L140 encePairwiseOnDemand]: 180/185 looper letters, 58 selfloop transitions, 3 changer transitions 0/159 dead transitions. [2023-11-26 10:49:54,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 159 transitions, 450 flow [2023-11-26 10:49:54,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:49:54,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:49:54,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 507 transitions. [2023-11-26 10:49:54,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851351351351351 [2023-11-26 10:49:54,596 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 507 transitions. [2023-11-26 10:49:54,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 507 transitions. [2023-11-26 10:49:54,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:54,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 507 transitions. [2023-11-26 10:49:54,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 126.75) internal successors, (507), 4 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:54,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:54,602 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:54,602 INFO L175 Difference]: Start difference. First operand has 159 places, 161 transitions, 332 flow. Second operand 4 states and 507 transitions. [2023-11-26 10:49:54,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 159 transitions, 450 flow [2023-11-26 10:49:54,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 159 transitions, 444 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 10:49:54,606 INFO L231 Difference]: Finished difference. Result has 157 places, 159 transitions, 328 flow [2023-11-26 10:49:54,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=328, PETRI_PLACES=157, PETRI_TRANSITIONS=159} [2023-11-26 10:49:54,609 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -18 predicate places. [2023-11-26 10:49:54,609 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 159 transitions, 328 flow [2023-11-26 10:49:54,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.75) internal successors, (447), 4 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:54,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:54,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:54,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:49:54,610 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:49:54,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:54,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1267377867, now seen corresponding path program 1 times [2023-11-26 10:49:54,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:54,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330452517] [2023-11-26 10:49:54,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:54,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:54,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:54,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:54,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330452517] [2023-11-26 10:49:54,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330452517] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:54,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:54,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:49:54,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726804973] [2023-11-26 10:49:54,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:54,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:54,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:54,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:54,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:54,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 185 [2023-11-26 10:49:54,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 159 transitions, 328 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:54,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:54,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 185 [2023-11-26 10:49:54,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:55,584 INFO L124 PetriNetUnfolderBase]: 1798/4843 cut-off events. [2023-11-26 10:49:55,584 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-26 10:49:55,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7733 conditions, 4843 events. 1798/4843 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 38903 event pairs, 1437 based on Foata normal form. 491/4040 useless extension candidates. Maximal degree in co-relation 7718. Up to 2853 conditions per place. [2023-11-26 10:49:55,618 INFO L140 encePairwiseOnDemand]: 181/185 looper letters, 59 selfloop transitions, 2 changer transitions 0/157 dead transitions. [2023-11-26 10:49:55,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 157 transitions, 446 flow [2023-11-26 10:49:55,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:55,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:49:55,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-11-26 10:49:55,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7135135135135136 [2023-11-26 10:49:55,621 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-11-26 10:49:55,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-11-26 10:49:55,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:55,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-11-26 10:49:55,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:55,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:55,626 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:55,626 INFO L175 Difference]: Start difference. First operand has 157 places, 159 transitions, 328 flow. Second operand 3 states and 396 transitions. [2023-11-26 10:49:55,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 157 transitions, 446 flow [2023-11-26 10:49:55,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 157 transitions, 440 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 10:49:55,630 INFO L231 Difference]: Finished difference. Result has 154 places, 157 transitions, 322 flow [2023-11-26 10:49:55,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=322, PETRI_PLACES=154, PETRI_TRANSITIONS=157} [2023-11-26 10:49:55,632 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -21 predicate places. [2023-11-26 10:49:55,632 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 157 transitions, 322 flow [2023-11-26 10:49:55,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:55,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:55,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:55,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:49:55,633 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:49:55,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:55,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1267377866, now seen corresponding path program 1 times [2023-11-26 10:49:55,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:55,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050373163] [2023-11-26 10:49:55,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:55,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:55,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:55,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050373163] [2023-11-26 10:49:55,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050373163] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:55,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:55,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:49:55,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412438577] [2023-11-26 10:49:55,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:55,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:55,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:55,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:55,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:55,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 185 [2023-11-26 10:49:55,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 157 transitions, 322 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:55,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:55,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 185 [2023-11-26 10:49:55,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:56,929 INFO L124 PetriNetUnfolderBase]: 2904/7222 cut-off events. [2023-11-26 10:49:56,929 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-26 10:49:56,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11708 conditions, 7222 events. 2904/7222 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 60453 event pairs, 2369 based on Foata normal form. 0/5398 useless extension candidates. Maximal degree in co-relation 11698. Up to 4450 conditions per place. [2023-11-26 10:49:56,993 INFO L140 encePairwiseOnDemand]: 181/185 looper letters, 61 selfloop transitions, 2 changer transitions 0/155 dead transitions. [2023-11-26 10:49:56,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 155 transitions, 444 flow [2023-11-26 10:49:56,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:56,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:49:56,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-11-26 10:49:56,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7063063063063063 [2023-11-26 10:49:56,997 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-11-26 10:49:56,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-11-26 10:49:56,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:56,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-11-26 10:49:56,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:57,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:57,003 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:57,003 INFO L175 Difference]: Start difference. First operand has 154 places, 157 transitions, 322 flow. Second operand 3 states and 392 transitions. [2023-11-26 10:49:57,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 155 transitions, 444 flow [2023-11-26 10:49:57,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 155 transitions, 440 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:49:57,009 INFO L231 Difference]: Finished difference. Result has 152 places, 155 transitions, 318 flow [2023-11-26 10:49:57,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=152, PETRI_TRANSITIONS=155} [2023-11-26 10:49:57,012 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -23 predicate places. [2023-11-26 10:49:57,013 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 155 transitions, 318 flow [2023-11-26 10:49:57,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:57,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:57,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:57,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 10:49:57,016 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:49:57,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:57,017 INFO L85 PathProgramCache]: Analyzing trace with hash -602545457, now seen corresponding path program 1 times [2023-11-26 10:49:57,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:57,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424555594] [2023-11-26 10:49:57,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:57,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:57,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:57,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:57,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424555594] [2023-11-26 10:49:57,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424555594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:57,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:57,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:49:57,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023721566] [2023-11-26 10:49:57,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:57,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:57,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:57,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:57,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:57,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 185 [2023-11-26 10:49:57,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 155 transitions, 318 flow. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:57,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:57,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 185 [2023-11-26 10:49:57,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:57,896 INFO L124 PetriNetUnfolderBase]: 1798/4794 cut-off events. [2023-11-26 10:49:57,896 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-26 10:49:57,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7683 conditions, 4794 events. 1798/4794 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 38298 event pairs, 1437 based on Foata normal form. 45/3594 useless extension candidates. Maximal degree in co-relation 7673. Up to 2853 conditions per place. [2023-11-26 10:49:57,927 INFO L140 encePairwiseOnDemand]: 181/185 looper letters, 59 selfloop transitions, 2 changer transitions 0/153 dead transitions. [2023-11-26 10:49:57,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 153 transitions, 436 flow [2023-11-26 10:49:57,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:57,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:49:57,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-11-26 10:49:57,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7135135135135136 [2023-11-26 10:49:57,930 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-11-26 10:49:57,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-11-26 10:49:57,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:57,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-11-26 10:49:57,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:57,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:57,934 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:57,934 INFO L175 Difference]: Start difference. First operand has 152 places, 155 transitions, 318 flow. Second operand 3 states and 396 transitions. [2023-11-26 10:49:57,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 153 transitions, 436 flow [2023-11-26 10:49:57,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 153 transitions, 432 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:49:57,939 INFO L231 Difference]: Finished difference. Result has 150 places, 153 transitions, 314 flow [2023-11-26 10:49:57,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=314, PETRI_PLACES=150, PETRI_TRANSITIONS=153} [2023-11-26 10:49:57,940 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -25 predicate places. [2023-11-26 10:49:57,941 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 153 transitions, 314 flow [2023-11-26 10:49:57,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:57,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:57,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:57,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 10:49:57,942 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:49:57,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:57,942 INFO L85 PathProgramCache]: Analyzing trace with hash -602545458, now seen corresponding path program 1 times [2023-11-26 10:49:57,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:57,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078056894] [2023-11-26 10:49:57,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:57,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:58,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:58,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078056894] [2023-11-26 10:49:58,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078056894] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:58,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:58,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:49:58,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174880850] [2023-11-26 10:49:58,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:58,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:58,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:58,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:58,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:58,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 185 [2023-11-26 10:49:58,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 153 transitions, 314 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 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) [2023-11-26 10:49:58,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:58,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 185 [2023-11-26 10:49:58,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:58,682 INFO L124 PetriNetUnfolderBase]: 1850/4903 cut-off events. [2023-11-26 10:49:58,682 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-26 10:49:58,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7890 conditions, 4903 events. 1850/4903 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 39053 event pairs, 1481 based on Foata normal form. 0/3646 useless extension candidates. Maximal degree in co-relation 7880. Up to 2951 conditions per place. [2023-11-26 10:49:58,718 INFO L140 encePairwiseOnDemand]: 181/185 looper letters, 61 selfloop transitions, 2 changer transitions 0/151 dead transitions. [2023-11-26 10:49:58,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 151 transitions, 436 flow [2023-11-26 10:49:58,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:58,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:49:58,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-11-26 10:49:58,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7063063063063063 [2023-11-26 10:49:58,720 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-11-26 10:49:58,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-11-26 10:49:58,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:58,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-11-26 10:49:58,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:58,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:58,725 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:58,725 INFO L175 Difference]: Start difference. First operand has 150 places, 153 transitions, 314 flow. Second operand 3 states and 392 transitions. [2023-11-26 10:49:58,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 151 transitions, 436 flow [2023-11-26 10:49:58,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 151 transitions, 432 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:49:58,729 INFO L231 Difference]: Finished difference. Result has 148 places, 151 transitions, 310 flow [2023-11-26 10:49:58,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=310, PETRI_PLACES=148, PETRI_TRANSITIONS=151} [2023-11-26 10:49:58,732 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -27 predicate places. [2023-11-26 10:49:58,732 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 151 transitions, 310 flow [2023-11-26 10:49:58,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 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) [2023-11-26 10:49:58,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:58,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:58,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 10:49:58,734 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:49:58,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:58,734 INFO L85 PathProgramCache]: Analyzing trace with hash 776465401, now seen corresponding path program 1 times [2023-11-26 10:49:58,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:58,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947540274] [2023-11-26 10:49:58,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:58,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:58,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:58,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947540274] [2023-11-26 10:49:58,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947540274] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:58,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:58,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:49:58,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19479273] [2023-11-26 10:49:58,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:58,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:49:58,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:58,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:49:58,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:49:59,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 185 [2023-11-26 10:49:59,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 151 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 87.83333333333333) internal successors, (527), 6 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:59,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:59,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 185 [2023-11-26 10:49:59,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:59,798 INFO L124 PetriNetUnfolderBase]: 2135/4707 cut-off events. [2023-11-26 10:49:59,798 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-26 10:49:59,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8154 conditions, 4707 events. 2135/4707 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 33524 event pairs, 747 based on Foata normal form. 0/4124 useless extension candidates. Maximal degree in co-relation 8144. Up to 1929 conditions per place. [2023-11-26 10:49:59,828 INFO L140 encePairwiseOnDemand]: 162/185 looper letters, 82 selfloop transitions, 7 changer transitions 0/155 dead transitions. [2023-11-26 10:49:59,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 155 transitions, 497 flow [2023-11-26 10:49:59,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:49:59,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:49:59,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 535 transitions. [2023-11-26 10:49:59,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5783783783783784 [2023-11-26 10:49:59,832 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 535 transitions. [2023-11-26 10:49:59,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 535 transitions. [2023-11-26 10:49:59,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:59,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 535 transitions. [2023-11-26 10:49:59,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:59,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:59,838 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:59,838 INFO L175 Difference]: Start difference. First operand has 148 places, 151 transitions, 310 flow. Second operand 5 states and 535 transitions. [2023-11-26 10:49:59,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 155 transitions, 497 flow [2023-11-26 10:49:59,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 155 transitions, 493 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:49:59,842 INFO L231 Difference]: Finished difference. Result has 134 places, 135 transitions, 288 flow [2023-11-26 10:49:59,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=134, PETRI_TRANSITIONS=135} [2023-11-26 10:49:59,844 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -41 predicate places. [2023-11-26 10:49:59,844 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 135 transitions, 288 flow [2023-11-26 10:49:59,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 87.83333333333333) internal successors, (527), 6 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:59,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:59,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:59,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 10:49:59,846 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:49:59,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:59,846 INFO L85 PathProgramCache]: Analyzing trace with hash 776465402, now seen corresponding path program 1 times [2023-11-26 10:49:59,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:59,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332573292] [2023-11-26 10:49:59,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:59,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:00,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:00,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332573292] [2023-11-26 10:50:00,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332573292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:00,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:00,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:50:00,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922932162] [2023-11-26 10:50:00,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:00,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:50:00,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:00,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:50:00,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:50:00,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 185 [2023-11-26 10:50:00,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 135 transitions, 288 flow. Second operand has 6 states, 6 states have (on average 100.5) internal successors, (603), 6 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:00,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:00,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 185 [2023-11-26 10:50:00,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:01,361 INFO L124 PetriNetUnfolderBase]: 1798/3881 cut-off events. [2023-11-26 10:50:01,362 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2023-11-26 10:50:01,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6915 conditions, 3881 events. 1798/3881 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 26069 event pairs, 738 based on Foata normal form. 216/3539 useless extension candidates. Maximal degree in co-relation 2647. Up to 1476 conditions per place. [2023-11-26 10:50:01,390 INFO L140 encePairwiseOnDemand]: 164/185 looper letters, 74 selfloop transitions, 7 changer transitions 0/141 dead transitions. [2023-11-26 10:50:01,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 141 transitions, 463 flow [2023-11-26 10:50:01,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:50:01,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:50:01,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 689 transitions. [2023-11-26 10:50:01,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6207207207207207 [2023-11-26 10:50:01,395 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 689 transitions. [2023-11-26 10:50:01,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 689 transitions. [2023-11-26 10:50:01,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:01,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 689 transitions. [2023-11-26 10:50:01,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 114.83333333333333) internal successors, (689), 6 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:01,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:01,402 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:01,402 INFO L175 Difference]: Start difference. First operand has 134 places, 135 transitions, 288 flow. Second operand 6 states and 689 transitions. [2023-11-26 10:50:01,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 141 transitions, 463 flow [2023-11-26 10:50:01,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 141 transitions, 449 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 10:50:01,408 INFO L231 Difference]: Finished difference. Result has 121 places, 121 transitions, 260 flow [2023-11-26 10:50:01,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=121, PETRI_TRANSITIONS=121} [2023-11-26 10:50:01,410 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -54 predicate places. [2023-11-26 10:50:01,411 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 121 transitions, 260 flow [2023-11-26 10:50:01,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 100.5) internal successors, (603), 6 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:01,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:01,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:01,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 10:50:01,412 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:50:01,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:01,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1699375518, now seen corresponding path program 1 times [2023-11-26 10:50:01,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:01,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683190255] [2023-11-26 10:50:01,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:01,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:01,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:01,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683190255] [2023-11-26 10:50:01,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683190255] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:01,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:01,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:50:01,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63507711] [2023-11-26 10:50:01,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:01,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:50:01,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:01,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:50:01,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:50:02,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 185 [2023-11-26 10:50:02,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 121 transitions, 260 flow. Second operand has 8 states, 8 states have (on average 96.375) internal successors, (771), 8 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:02,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:02,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 185 [2023-11-26 10:50:02,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:03,569 INFO L124 PetriNetUnfolderBase]: 2502/5428 cut-off events. [2023-11-26 10:50:03,570 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2023-11-26 10:50:03,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9587 conditions, 5428 events. 2502/5428 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 39295 event pairs, 536 based on Foata normal form. 0/4431 useless extension candidates. Maximal degree in co-relation 3717. Up to 3437 conditions per place. [2023-11-26 10:50:03,608 INFO L140 encePairwiseOnDemand]: 175/185 looper letters, 124 selfloop transitions, 12 changer transitions 0/188 dead transitions. [2023-11-26 10:50:03,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 188 transitions, 671 flow [2023-11-26 10:50:03,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:50:03,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 10:50:03,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 898 transitions. [2023-11-26 10:50:03,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067567567567568 [2023-11-26 10:50:03,612 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 898 transitions. [2023-11-26 10:50:03,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 898 transitions. [2023-11-26 10:50:03,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:03,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 898 transitions. [2023-11-26 10:50:03,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 112.25) internal successors, (898), 8 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:03,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:03,622 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:03,622 INFO L175 Difference]: Start difference. First operand has 121 places, 121 transitions, 260 flow. Second operand 8 states and 898 transitions. [2023-11-26 10:50:03,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 188 transitions, 671 flow [2023-11-26 10:50:03,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 188 transitions, 655 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-26 10:50:03,629 INFO L231 Difference]: Finished difference. Result has 127 places, 131 transitions, 322 flow [2023-11-26 10:50:03,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=322, PETRI_PLACES=127, PETRI_TRANSITIONS=131} [2023-11-26 10:50:03,630 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -48 predicate places. [2023-11-26 10:50:03,630 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 131 transitions, 322 flow [2023-11-26 10:50:03,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 96.375) internal successors, (771), 8 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:03,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:03,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:03,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 10:50:03,631 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:50:03,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:03,632 INFO L85 PathProgramCache]: Analyzing trace with hash 604103670, now seen corresponding path program 1 times [2023-11-26 10:50:03,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:03,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198633399] [2023-11-26 10:50:03,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:03,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:03,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:03,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198633399] [2023-11-26 10:50:03,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198633399] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:03,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:03,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:50:03,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104545070] [2023-11-26 10:50:03,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:03,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:50:03,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:03,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:50:03,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:03,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 185 [2023-11-26 10:50:03,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 131 transitions, 322 flow. Second operand has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:03,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:03,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 185 [2023-11-26 10:50:03,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:04,209 INFO L124 PetriNetUnfolderBase]: 1391/3289 cut-off events. [2023-11-26 10:50:04,209 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2023-11-26 10:50:04,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5714 conditions, 3289 events. 1391/3289 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 20503 event pairs, 707 based on Foata normal form. 53/2813 useless extension candidates. Maximal degree in co-relation 5707. Up to 1252 conditions per place. [2023-11-26 10:50:04,232 INFO L140 encePairwiseOnDemand]: 181/185 looper letters, 83 selfloop transitions, 3 changer transitions 0/145 dead transitions. [2023-11-26 10:50:04,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 145 transitions, 496 flow [2023-11-26 10:50:04,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:50:04,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:50:04,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2023-11-26 10:50:04,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7675675675675676 [2023-11-26 10:50:04,235 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2023-11-26 10:50:04,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2023-11-26 10:50:04,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:04,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2023-11-26 10:50:04,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:04,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:04,240 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:04,240 INFO L175 Difference]: Start difference. First operand has 127 places, 131 transitions, 322 flow. Second operand 3 states and 426 transitions. [2023-11-26 10:50:04,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 145 transitions, 496 flow [2023-11-26 10:50:04,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 145 transitions, 469 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-11-26 10:50:04,245 INFO L231 Difference]: Finished difference. Result has 119 places, 121 transitions, 259 flow [2023-11-26 10:50:04,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=259, PETRI_PLACES=119, PETRI_TRANSITIONS=121} [2023-11-26 10:50:04,246 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -56 predicate places. [2023-11-26 10:50:04,246 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 121 transitions, 259 flow [2023-11-26 10:50:04,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:04,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:04,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:04,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 10:50:04,247 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:50:04,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:04,247 INFO L85 PathProgramCache]: Analyzing trace with hash 42835281, now seen corresponding path program 1 times [2023-11-26 10:50:04,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:04,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984420358] [2023-11-26 10:50:04,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:04,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:04,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:04,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:04,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:04,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984420358] [2023-11-26 10:50:04,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984420358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:04,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:04,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:50:04,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500221906] [2023-11-26 10:50:04,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:04,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:50:04,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:04,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:50:04,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:50:04,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 185 [2023-11-26 10:50:04,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 121 transitions, 259 flow. Second operand has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:04,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:04,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 185 [2023-11-26 10:50:04,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:05,171 INFO L124 PetriNetUnfolderBase]: 2290/5051 cut-off events. [2023-11-26 10:50:05,171 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2023-11-26 10:50:05,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8835 conditions, 5051 events. 2290/5051 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 33433 event pairs, 1839 based on Foata normal form. 73/4380 useless extension candidates. Maximal degree in co-relation 8830. Up to 3557 conditions per place. [2023-11-26 10:50:05,201 INFO L140 encePairwiseOnDemand]: 180/185 looper letters, 63 selfloop transitions, 2 changer transitions 0/118 dead transitions. [2023-11-26 10:50:05,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 118 transitions, 383 flow [2023-11-26 10:50:05,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:50:05,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:50:05,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 388 transitions. [2023-11-26 10:50:05,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6990990990990991 [2023-11-26 10:50:05,203 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 388 transitions. [2023-11-26 10:50:05,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 388 transitions. [2023-11-26 10:50:05,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:05,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 388 transitions. [2023-11-26 10:50:05,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:05,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:05,207 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:05,207 INFO L175 Difference]: Start difference. First operand has 119 places, 121 transitions, 259 flow. Second operand 3 states and 388 transitions. [2023-11-26 10:50:05,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 118 transitions, 383 flow [2023-11-26 10:50:05,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 118 transitions, 380 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:50:05,212 INFO L231 Difference]: Finished difference. Result has 117 places, 118 transitions, 254 flow [2023-11-26 10:50:05,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=117, PETRI_TRANSITIONS=118} [2023-11-26 10:50:05,213 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -58 predicate places. [2023-11-26 10:50:05,213 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 118 transitions, 254 flow [2023-11-26 10:50:05,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:05,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:05,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:05,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 10:50:05,214 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:50:05,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:05,215 INFO L85 PathProgramCache]: Analyzing trace with hash 42835282, now seen corresponding path program 1 times [2023-11-26 10:50:05,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:05,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707903059] [2023-11-26 10:50:05,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:05,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:05,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:05,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:05,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707903059] [2023-11-26 10:50:05,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707903059] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:05,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:05,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:50:05,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140378440] [2023-11-26 10:50:05,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:05,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:50:05,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:05,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:50:05,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:50:06,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 185 [2023-11-26 10:50:06,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 118 transitions, 254 flow. Second operand has 9 states, 9 states have (on average 107.0) internal successors, (963), 9 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:06,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:06,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 185 [2023-11-26 10:50:06,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:07,116 INFO L124 PetriNetUnfolderBase]: 1652/3726 cut-off events. [2023-11-26 10:50:07,116 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2023-11-26 10:50:07,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6588 conditions, 3726 events. 1652/3726 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 23140 event pairs, 406 based on Foata normal form. 0/3179 useless extension candidates. Maximal degree in co-relation 6583. Up to 2374 conditions per place. [2023-11-26 10:50:07,137 INFO L140 encePairwiseOnDemand]: 175/185 looper letters, 99 selfloop transitions, 9 changer transitions 0/156 dead transitions. [2023-11-26 10:50:07,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 156 transitions, 551 flow [2023-11-26 10:50:07,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:50:07,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:50:07,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1053 transitions. [2023-11-26 10:50:07,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324324324324324 [2023-11-26 10:50:07,142 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1053 transitions. [2023-11-26 10:50:07,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1053 transitions. [2023-11-26 10:50:07,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:07,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1053 transitions. [2023-11-26 10:50:07,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:07,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 185.0) internal successors, (1850), 10 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:07,151 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 185.0) internal successors, (1850), 10 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:07,152 INFO L175 Difference]: Start difference. First operand has 117 places, 118 transitions, 254 flow. Second operand 9 states and 1053 transitions. [2023-11-26 10:50:07,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 156 transitions, 551 flow [2023-11-26 10:50:07,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 156 transitions, 547 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:50:07,156 INFO L231 Difference]: Finished difference. Result has 122 places, 116 transitions, 264 flow [2023-11-26 10:50:07,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=264, PETRI_PLACES=122, PETRI_TRANSITIONS=116} [2023-11-26 10:50:07,157 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -53 predicate places. [2023-11-26 10:50:07,158 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 116 transitions, 264 flow [2023-11-26 10:50:07,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 107.0) internal successors, (963), 9 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:07,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:07,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:07,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 10:50:07,159 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:50:07,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:07,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1361225858, now seen corresponding path program 1 times [2023-11-26 10:50:07,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:07,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644487103] [2023-11-26 10:50:07,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:07,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:07,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:07,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644487103] [2023-11-26 10:50:07,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644487103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:07,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:07,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:50:07,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266593502] [2023-11-26 10:50:07,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:07,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:50:07,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:07,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:50:07,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:50:07,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 185 [2023-11-26 10:50:07,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 116 transitions, 264 flow. Second operand has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:07,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:07,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 185 [2023-11-26 10:50:07,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:07,943 INFO L124 PetriNetUnfolderBase]: 1380/3297 cut-off events. [2023-11-26 10:50:07,943 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2023-11-26 10:50:07,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5750 conditions, 3297 events. 1380/3297 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 20732 event pairs, 1089 based on Foata normal form. 0/2775 useless extension candidates. Maximal degree in co-relation 5745. Up to 2232 conditions per place. [2023-11-26 10:50:07,962 INFO L140 encePairwiseOnDemand]: 182/185 looper letters, 59 selfloop transitions, 2 changer transitions 0/115 dead transitions. [2023-11-26 10:50:07,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 115 transitions, 384 flow [2023-11-26 10:50:07,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:50:07,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:50:07,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 509 transitions. [2023-11-26 10:50:07,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6878378378378378 [2023-11-26 10:50:07,965 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 509 transitions. [2023-11-26 10:50:07,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 509 transitions. [2023-11-26 10:50:07,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:07,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 509 transitions. [2023-11-26 10:50:07,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:07,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:07,970 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:07,970 INFO L175 Difference]: Start difference. First operand has 122 places, 116 transitions, 264 flow. Second operand 4 states and 509 transitions. [2023-11-26 10:50:07,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 115 transitions, 384 flow [2023-11-26 10:50:07,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 115 transitions, 366 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-26 10:50:07,974 INFO L231 Difference]: Finished difference. Result has 116 places, 115 transitions, 248 flow [2023-11-26 10:50:07,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=248, PETRI_PLACES=116, PETRI_TRANSITIONS=115} [2023-11-26 10:50:07,975 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -59 predicate places. [2023-11-26 10:50:07,975 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 115 transitions, 248 flow [2023-11-26 10:50:07,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:07,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:07,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:07,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 10:50:07,976 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:50:07,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:07,977 INFO L85 PathProgramCache]: Analyzing trace with hash -751670441, now seen corresponding path program 1 times [2023-11-26 10:50:07,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:07,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445633403] [2023-11-26 10:50:07,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:07,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:08,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:08,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445633403] [2023-11-26 10:50:08,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445633403] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:08,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:08,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:50:08,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372354594] [2023-11-26 10:50:08,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:08,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:50:08,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:08,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:50:08,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:50:08,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 185 [2023-11-26 10:50:08,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 115 transitions, 248 flow. Second operand has 6 states, 6 states have (on average 108.33333333333333) internal successors, (650), 6 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:08,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:08,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 185 [2023-11-26 10:50:08,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:08,890 INFO L124 PetriNetUnfolderBase]: 1397/3290 cut-off events. [2023-11-26 10:50:08,890 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2023-11-26 10:50:08,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5712 conditions, 3290 events. 1397/3290 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 20528 event pairs, 1074 based on Foata normal form. 0/2804 useless extension candidates. Maximal degree in co-relation 5707. Up to 2202 conditions per place. [2023-11-26 10:50:08,908 INFO L140 encePairwiseOnDemand]: 178/185 looper letters, 67 selfloop transitions, 5 changer transitions 0/121 dead transitions. [2023-11-26 10:50:08,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 121 transitions, 405 flow [2023-11-26 10:50:08,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:50:08,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:50:08,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 598 transitions. [2023-11-26 10:50:08,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6464864864864864 [2023-11-26 10:50:08,911 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 598 transitions. [2023-11-26 10:50:08,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 598 transitions. [2023-11-26 10:50:08,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:08,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 598 transitions. [2023-11-26 10:50:08,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 119.6) internal successors, (598), 5 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:08,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:08,918 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:08,918 INFO L175 Difference]: Start difference. First operand has 116 places, 115 transitions, 248 flow. Second operand 5 states and 598 transitions. [2023-11-26 10:50:08,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 121 transitions, 405 flow [2023-11-26 10:50:08,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 121 transitions, 402 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:50:08,922 INFO L231 Difference]: Finished difference. Result has 116 places, 113 transitions, 251 flow [2023-11-26 10:50:08,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=251, PETRI_PLACES=116, PETRI_TRANSITIONS=113} [2023-11-26 10:50:08,923 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -59 predicate places. [2023-11-26 10:50:08,923 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 113 transitions, 251 flow [2023-11-26 10:50:08,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 108.33333333333333) internal successors, (650), 6 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:08,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:08,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:08,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-26 10:50:08,925 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:50:08,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:08,925 INFO L85 PathProgramCache]: Analyzing trace with hash -751670440, now seen corresponding path program 1 times [2023-11-26 10:50:08,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:08,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403468881] [2023-11-26 10:50:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:08,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:09,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:09,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:09,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403468881] [2023-11-26 10:50:09,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403468881] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:09,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:09,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:50:09,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339309842] [2023-11-26 10:50:09,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:09,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:50:09,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:09,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:50:09,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:50:09,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 185 [2023-11-26 10:50:09,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 113 transitions, 251 flow. Second operand has 6 states, 6 states have (on average 114.0) internal successors, (684), 6 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:09,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:09,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 185 [2023-11-26 10:50:09,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:10,187 INFO L124 PetriNetUnfolderBase]: 1380/3249 cut-off events. [2023-11-26 10:50:10,188 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-11-26 10:50:10,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5666 conditions, 3249 events. 1380/3249 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 20268 event pairs, 1074 based on Foata normal form. 24/2787 useless extension candidates. Maximal degree in co-relation 5661. Up to 2203 conditions per place. [2023-11-26 10:50:10,203 INFO L140 encePairwiseOnDemand]: 178/185 looper letters, 64 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2023-11-26 10:50:10,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 119 transitions, 402 flow [2023-11-26 10:50:10,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:50:10,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:50:10,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 736 transitions. [2023-11-26 10:50:10,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630630630630631 [2023-11-26 10:50:10,207 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 736 transitions. [2023-11-26 10:50:10,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 736 transitions. [2023-11-26 10:50:10,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:10,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 736 transitions. [2023-11-26 10:50:10,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 122.66666666666667) internal successors, (736), 6 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:10,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:10,215 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:10,215 INFO L175 Difference]: Start difference. First operand has 116 places, 113 transitions, 251 flow. Second operand 6 states and 736 transitions. [2023-11-26 10:50:10,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 119 transitions, 402 flow [2023-11-26 10:50:10,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 119 transitions, 392 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 10:50:10,219 INFO L231 Difference]: Finished difference. Result has 115 places, 111 transitions, 247 flow [2023-11-26 10:50:10,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=247, PETRI_PLACES=115, PETRI_TRANSITIONS=111} [2023-11-26 10:50:10,220 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -60 predicate places. [2023-11-26 10:50:10,221 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 111 transitions, 247 flow [2023-11-26 10:50:10,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 114.0) internal successors, (684), 6 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:10,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:10,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:10,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-26 10:50:10,222 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:50:10,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:10,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1826979034, now seen corresponding path program 1 times [2023-11-26 10:50:10,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:10,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451103879] [2023-11-26 10:50:10,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:10,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:10,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:10,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:10,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451103879] [2023-11-26 10:50:10,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451103879] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:10,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:10,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:50:10,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271840147] [2023-11-26 10:50:10,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:10,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:50:10,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:10,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:50:10,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:10,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 185 [2023-11-26 10:50:10,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 111 transitions, 247 flow. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:10,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:10,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 185 [2023-11-26 10:50:10,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:10,727 INFO L124 PetriNetUnfolderBase]: 1368/3237 cut-off events. [2023-11-26 10:50:10,727 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-26 10:50:10,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5641 conditions, 3237 events. 1368/3237 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 20257 event pairs, 1074 based on Foata normal form. 0/2763 useless extension candidates. Maximal degree in co-relation 5636. Up to 2194 conditions per place. [2023-11-26 10:50:10,743 INFO L140 encePairwiseOnDemand]: 182/185 looper letters, 66 selfloop transitions, 2 changer transitions 0/118 dead transitions. [2023-11-26 10:50:10,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 118 transitions, 398 flow [2023-11-26 10:50:10,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:50:10,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:50:10,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2023-11-26 10:50:10,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2023-11-26 10:50:10,746 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2023-11-26 10:50:10,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2023-11-26 10:50:10,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:10,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2023-11-26 10:50:10,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:10,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:10,751 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:10,751 INFO L175 Difference]: Start difference. First operand has 115 places, 111 transitions, 247 flow. Second operand 3 states and 407 transitions. [2023-11-26 10:50:10,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 118 transitions, 398 flow [2023-11-26 10:50:10,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 118 transitions, 388 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-26 10:50:10,755 INFO L231 Difference]: Finished difference. Result has 112 places, 110 transitions, 239 flow [2023-11-26 10:50:10,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=239, PETRI_PLACES=112, PETRI_TRANSITIONS=110} [2023-11-26 10:50:10,756 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -63 predicate places. [2023-11-26 10:50:10,756 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 110 transitions, 239 flow [2023-11-26 10:50:10,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:10,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:10,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:10,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-26 10:50:10,757 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:50:10,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:10,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1201692480, now seen corresponding path program 1 times [2023-11-26 10:50:10,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:10,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866630505] [2023-11-26 10:50:10,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:10,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:12,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:12,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866630505] [2023-11-26 10:50:12,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866630505] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:12,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:12,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-26 10:50:12,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599933880] [2023-11-26 10:50:12,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:12,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:50:12,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:12,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:50:12,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:50:13,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 185 [2023-11-26 10:50:13,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 110 transitions, 239 flow. Second operand has 14 states, 14 states have (on average 106.64285714285714) internal successors, (1493), 14 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:13,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:13,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 185 [2023-11-26 10:50:13,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:14,498 INFO L124 PetriNetUnfolderBase]: 1634/3511 cut-off events. [2023-11-26 10:50:14,498 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2023-11-26 10:50:14,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6358 conditions, 3511 events. 1634/3511 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 21056 event pairs, 434 based on Foata normal form. 0/3120 useless extension candidates. Maximal degree in co-relation 6353. Up to 1940 conditions per place. [2023-11-26 10:50:14,519 INFO L140 encePairwiseOnDemand]: 171/185 looper letters, 127 selfloop transitions, 13 changer transitions 0/180 dead transitions. [2023-11-26 10:50:14,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 180 transitions, 670 flow [2023-11-26 10:50:14,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:50:14,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 10:50:14,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1400 transitions. [2023-11-26 10:50:14,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306306306306306 [2023-11-26 10:50:14,526 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1400 transitions. [2023-11-26 10:50:14,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1400 transitions. [2023-11-26 10:50:14,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:14,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1400 transitions. [2023-11-26 10:50:14,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 116.66666666666667) internal successors, (1400), 12 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:14,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 185.0) internal successors, (2405), 13 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:14,542 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 185.0) internal successors, (2405), 13 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:14,542 INFO L175 Difference]: Start difference. First operand has 112 places, 110 transitions, 239 flow. Second operand 12 states and 1400 transitions. [2023-11-26 10:50:14,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 180 transitions, 670 flow [2023-11-26 10:50:14,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 180 transitions, 666 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:50:14,550 INFO L231 Difference]: Finished difference. Result has 118 places, 107 transitions, 261 flow [2023-11-26 10:50:14,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=261, PETRI_PLACES=118, PETRI_TRANSITIONS=107} [2023-11-26 10:50:14,551 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -57 predicate places. [2023-11-26 10:50:14,551 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 107 transitions, 261 flow [2023-11-26 10:50:14,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 106.64285714285714) internal successors, (1493), 14 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:14,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:14,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:14,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-26 10:50:14,569 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:50:14,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:14,570 INFO L85 PathProgramCache]: Analyzing trace with hash 88265539, now seen corresponding path program 1 times [2023-11-26 10:50:14,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:14,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29278131] [2023-11-26 10:50:14,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:14,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:15,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:15,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29278131] [2023-11-26 10:50:15,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29278131] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:15,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:15,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-26 10:50:15,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507955696] [2023-11-26 10:50:15,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:15,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 10:50:15,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:15,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 10:50:15,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-26 10:50:18,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 185 [2023-11-26 10:50:18,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 107 transitions, 261 flow. Second operand has 13 states, 13 states have (on average 90.15384615384616) internal successors, (1172), 13 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:18,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:18,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 185 [2023-11-26 10:50:18,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:19,234 INFO L124 PetriNetUnfolderBase]: 1689/3616 cut-off events. [2023-11-26 10:50:19,234 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2023-11-26 10:50:19,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6724 conditions, 3616 events. 1689/3616 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 21940 event pairs, 466 based on Foata normal form. 12/3219 useless extension candidates. Maximal degree in co-relation 6718. Up to 2056 conditions per place. [2023-11-26 10:50:19,249 INFO L140 encePairwiseOnDemand]: 170/185 looper letters, 126 selfloop transitions, 14 changer transitions 0/180 dead transitions. [2023-11-26 10:50:19,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 180 transitions, 698 flow [2023-11-26 10:50:19,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:50:19,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 10:50:19,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1196 transitions. [2023-11-26 10:50:19,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5387387387387388 [2023-11-26 10:50:19,258 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1196 transitions. [2023-11-26 10:50:19,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1196 transitions. [2023-11-26 10:50:19,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:19,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1196 transitions. [2023-11-26 10:50:19,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 99.66666666666667) internal successors, (1196), 12 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:19,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 185.0) internal successors, (2405), 13 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:19,270 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 185.0) internal successors, (2405), 13 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:19,270 INFO L175 Difference]: Start difference. First operand has 118 places, 107 transitions, 261 flow. Second operand 12 states and 1196 transitions. [2023-11-26 10:50:19,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 180 transitions, 698 flow [2023-11-26 10:50:19,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 180 transitions, 676 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-11-26 10:50:19,275 INFO L231 Difference]: Finished difference. Result has 122 places, 109 transitions, 287 flow [2023-11-26 10:50:19,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=287, PETRI_PLACES=122, PETRI_TRANSITIONS=109} [2023-11-26 10:50:19,276 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -53 predicate places. [2023-11-26 10:50:19,276 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 109 transitions, 287 flow [2023-11-26 10:50:19,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 90.15384615384616) internal successors, (1172), 13 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:19,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:19,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:19,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-26 10:50:19,278 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:50:19,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:19,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1553881435, now seen corresponding path program 1 times [2023-11-26 10:50:19,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:19,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134006308] [2023-11-26 10:50:19,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:19,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:20,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:20,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134006308] [2023-11-26 10:50:20,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134006308] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:20,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:20,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-26 10:50:20,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858185964] [2023-11-26 10:50:20,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:20,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 10:50:20,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:20,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 10:50:20,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:50:22,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 185 [2023-11-26 10:50:22,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 109 transitions, 287 flow. Second operand has 15 states, 15 states have (on average 107.26666666666667) internal successors, (1609), 15 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:22,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:22,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 185 [2023-11-26 10:50:22,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:23,296 INFO L124 PetriNetUnfolderBase]: 1846/3811 cut-off events. [2023-11-26 10:50:23,296 INFO L125 PetriNetUnfolderBase]: For 286/286 co-relation queries the response was YES. [2023-11-26 10:50:23,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7382 conditions, 3811 events. 1846/3811 cut-off events. For 286/286 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 22282 event pairs, 496 based on Foata normal form. 0/3440 useless extension candidates. Maximal degree in co-relation 7373. Up to 1990 conditions per place. [2023-11-26 10:50:23,318 INFO L140 encePairwiseOnDemand]: 161/185 looper letters, 161 selfloop transitions, 23 changer transitions 0/224 dead transitions. [2023-11-26 10:50:23,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 224 transitions, 903 flow [2023-11-26 10:50:23,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 10:50:23,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-26 10:50:23,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1759 transitions. [2023-11-26 10:50:23,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6338738738738738 [2023-11-26 10:50:23,324 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1759 transitions. [2023-11-26 10:50:23,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1759 transitions. [2023-11-26 10:50:23,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:23,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1759 transitions. [2023-11-26 10:50:23,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 117.26666666666667) internal successors, (1759), 15 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:23,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 185.0) internal successors, (2960), 16 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:23,339 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 185.0) internal successors, (2960), 16 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:23,339 INFO L175 Difference]: Start difference. First operand has 122 places, 109 transitions, 287 flow. Second operand 15 states and 1759 transitions. [2023-11-26 10:50:23,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 224 transitions, 903 flow [2023-11-26 10:50:23,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 224 transitions, 881 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-11-26 10:50:23,345 INFO L231 Difference]: Finished difference. Result has 129 places, 115 transitions, 347 flow [2023-11-26 10:50:23,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=347, PETRI_PLACES=129, PETRI_TRANSITIONS=115} [2023-11-26 10:50:23,346 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -46 predicate places. [2023-11-26 10:50:23,347 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 115 transitions, 347 flow [2023-11-26 10:50:23,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 107.26666666666667) internal successors, (1609), 15 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:23,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:23,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:23,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-26 10:50:23,348 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:50:23,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:23,349 INFO L85 PathProgramCache]: Analyzing trace with hash 926760372, now seen corresponding path program 1 times [2023-11-26 10:50:23,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:23,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787619730] [2023-11-26 10:50:23,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:23,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:23,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:23,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787619730] [2023-11-26 10:50:23,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787619730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:23,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:23,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:50:23,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174261395] [2023-11-26 10:50:23,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:23,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:50:23,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:23,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:50:23,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:50:23,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 185 [2023-11-26 10:50:23,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 115 transitions, 347 flow. Second operand has 5 states, 5 states have (on average 117.4) internal successors, (587), 5 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:23,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:23,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 185 [2023-11-26 10:50:23,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:24,578 INFO L124 PetriNetUnfolderBase]: 1931/3879 cut-off events. [2023-11-26 10:50:24,578 INFO L125 PetriNetUnfolderBase]: For 618/618 co-relation queries the response was YES. [2023-11-26 10:50:24,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8387 conditions, 3879 events. 1931/3879 cut-off events. For 618/618 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 22448 event pairs, 1037 based on Foata normal form. 24/3693 useless extension candidates. Maximal degree in co-relation 8376. Up to 2634 conditions per place. [2023-11-26 10:50:24,606 INFO L140 encePairwiseOnDemand]: 179/185 looper letters, 95 selfloop transitions, 4 changer transitions 0/147 dead transitions. [2023-11-26 10:50:24,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 147 transitions, 641 flow [2023-11-26 10:50:24,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:50:24,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:50:24,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 648 transitions. [2023-11-26 10:50:24,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7005405405405405 [2023-11-26 10:50:24,609 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 648 transitions. [2023-11-26 10:50:24,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 648 transitions. [2023-11-26 10:50:24,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:24,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 648 transitions. [2023-11-26 10:50:24,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:24,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:24,614 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:24,614 INFO L175 Difference]: Start difference. First operand has 129 places, 115 transitions, 347 flow. Second operand 5 states and 648 transitions. [2023-11-26 10:50:24,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 147 transitions, 641 flow [2023-11-26 10:50:24,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 147 transitions, 601 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-11-26 10:50:24,622 INFO L231 Difference]: Finished difference. Result has 122 places, 116 transitions, 329 flow [2023-11-26 10:50:24,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=329, PETRI_PLACES=122, PETRI_TRANSITIONS=116} [2023-11-26 10:50:24,623 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -53 predicate places. [2023-11-26 10:50:24,623 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 116 transitions, 329 flow [2023-11-26 10:50:24,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.4) internal successors, (587), 5 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:24,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:24,624 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:24,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-26 10:50:24,624 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:50:24,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:24,625 INFO L85 PathProgramCache]: Analyzing trace with hash 91127931, now seen corresponding path program 1 times [2023-11-26 10:50:24,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:24,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233612202] [2023-11-26 10:50:24,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:24,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:24,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:24,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:24,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233612202] [2023-11-26 10:50:24,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233612202] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:24,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:24,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:50:24,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425461450] [2023-11-26 10:50:24,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:24,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:50:24,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:24,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:50:24,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:24,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 185 [2023-11-26 10:50:24,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 116 transitions, 329 flow. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:24,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:24,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 185 [2023-11-26 10:50:24,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:25,137 INFO L124 PetriNetUnfolderBase]: 1283/2857 cut-off events. [2023-11-26 10:50:25,137 INFO L125 PetriNetUnfolderBase]: For 343/343 co-relation queries the response was YES. [2023-11-26 10:50:25,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5755 conditions, 2857 events. 1283/2857 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 16044 event pairs, 669 based on Foata normal form. 56/2679 useless extension candidates. Maximal degree in co-relation 5743. Up to 1142 conditions per place. [2023-11-26 10:50:25,155 INFO L140 encePairwiseOnDemand]: 181/185 looper letters, 79 selfloop transitions, 3 changer transitions 0/130 dead transitions. [2023-11-26 10:50:25,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 130 transitions, 528 flow [2023-11-26 10:50:25,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:50:25,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:50:25,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 412 transitions. [2023-11-26 10:50:25,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7423423423423423 [2023-11-26 10:50:25,158 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 412 transitions. [2023-11-26 10:50:25,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 412 transitions. [2023-11-26 10:50:25,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:25,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 412 transitions. [2023-11-26 10:50:25,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:25,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:25,161 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:25,161 INFO L175 Difference]: Start difference. First operand has 122 places, 116 transitions, 329 flow. Second operand 3 states and 412 transitions. [2023-11-26 10:50:25,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 130 transitions, 528 flow [2023-11-26 10:50:25,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 130 transitions, 514 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-26 10:50:25,167 INFO L231 Difference]: Finished difference. Result has 123 places, 114 transitions, 325 flow [2023-11-26 10:50:25,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=325, PETRI_PLACES=123, PETRI_TRANSITIONS=114} [2023-11-26 10:50:25,168 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -52 predicate places. [2023-11-26 10:50:25,168 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 114 transitions, 325 flow [2023-11-26 10:50:25,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:25,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:25,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:25,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-26 10:50:25,169 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:50:25,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:25,169 INFO L85 PathProgramCache]: Analyzing trace with hash 58065135, now seen corresponding path program 1 times [2023-11-26 10:50:25,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:25,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080982449] [2023-11-26 10:50:25,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:25,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:50:25,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:25,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080982449] [2023-11-26 10:50:25,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080982449] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:25,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:25,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:50:25,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790658280] [2023-11-26 10:50:25,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:25,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:50:25,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:25,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:50:25,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:25,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 185 [2023-11-26 10:50:25,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 114 transitions, 325 flow. Second operand has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:25,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:25,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 185 [2023-11-26 10:50:25,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:25,944 INFO L124 PetriNetUnfolderBase]: 1863/4339 cut-off events. [2023-11-26 10:50:25,945 INFO L125 PetriNetUnfolderBase]: For 734/738 co-relation queries the response was YES. [2023-11-26 10:50:25,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8533 conditions, 4339 events. 1863/4339 cut-off events. For 734/738 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 28954 event pairs, 959 based on Foata normal form. 80/4017 useless extension candidates. Maximal degree in co-relation 8520. Up to 1979 conditions per place. [2023-11-26 10:50:25,971 INFO L140 encePairwiseOnDemand]: 182/185 looper letters, 115 selfloop transitions, 2 changer transitions 0/167 dead transitions. [2023-11-26 10:50:25,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 167 transitions, 732 flow [2023-11-26 10:50:25,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:50:25,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:50:25,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 445 transitions. [2023-11-26 10:50:25,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8018018018018018 [2023-11-26 10:50:25,974 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 445 transitions. [2023-11-26 10:50:25,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 445 transitions. [2023-11-26 10:50:25,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:25,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 445 transitions. [2023-11-26 10:50:25,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:25,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:25,980 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:25,980 INFO L175 Difference]: Start difference. First operand has 123 places, 114 transitions, 325 flow. Second operand 3 states and 445 transitions. [2023-11-26 10:50:25,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 167 transitions, 732 flow [2023-11-26 10:50:25,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 167 transitions, 722 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:50:25,986 INFO L231 Difference]: Finished difference. Result has 124 places, 115 transitions, 331 flow [2023-11-26 10:50:25,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=331, PETRI_PLACES=124, PETRI_TRANSITIONS=115} [2023-11-26 10:50:25,988 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -51 predicate places. [2023-11-26 10:50:25,988 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 115 transitions, 331 flow [2023-11-26 10:50:25,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:25,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:25,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:25,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-26 10:50:25,989 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:50:25,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:25,989 INFO L85 PathProgramCache]: Analyzing trace with hash -2081248762, now seen corresponding path program 1 times [2023-11-26 10:50:25,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:25,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698128184] [2023-11-26 10:50:25,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:25,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:26,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:26,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:26,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698128184] [2023-11-26 10:50:26,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698128184] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:26,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:26,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:50:26,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35797001] [2023-11-26 10:50:26,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:26,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:50:26,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:26,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:50:26,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:50:26,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 185 [2023-11-26 10:50:26,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 115 transitions, 331 flow. Second operand has 6 states, 6 states have (on average 103.5) internal successors, (621), 6 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:26,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:26,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 185 [2023-11-26 10:50:26,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:27,278 INFO L124 PetriNetUnfolderBase]: 2016/4262 cut-off events. [2023-11-26 10:50:27,278 INFO L125 PetriNetUnfolderBase]: For 1071/1071 co-relation queries the response was YES. [2023-11-26 10:50:27,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9309 conditions, 4262 events. 2016/4262 cut-off events. For 1071/1071 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 25791 event pairs, 1366 based on Foata normal form. 0/4144 useless extension candidates. Maximal degree in co-relation 9295. Up to 2668 conditions per place. [2023-11-26 10:50:27,311 INFO L140 encePairwiseOnDemand]: 172/185 looper letters, 72 selfloop transitions, 5 changer transitions 0/114 dead transitions. [2023-11-26 10:50:27,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 114 transitions, 490 flow [2023-11-26 10:50:27,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:50:27,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:50:27,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 562 transitions. [2023-11-26 10:50:27,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6075675675675676 [2023-11-26 10:50:27,313 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 562 transitions. [2023-11-26 10:50:27,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 562 transitions. [2023-11-26 10:50:27,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:27,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 562 transitions. [2023-11-26 10:50:27,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.4) internal successors, (562), 5 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:27,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:27,318 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:27,318 INFO L175 Difference]: Start difference. First operand has 124 places, 115 transitions, 331 flow. Second operand 5 states and 562 transitions. [2023-11-26 10:50:27,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 114 transitions, 490 flow [2023-11-26 10:50:27,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 114 transitions, 488 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:50:27,325 INFO L231 Difference]: Finished difference. Result has 119 places, 107 transitions, 323 flow [2023-11-26 10:50:27,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=323, PETRI_PLACES=119, PETRI_TRANSITIONS=107} [2023-11-26 10:50:27,326 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -56 predicate places. [2023-11-26 10:50:27,326 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 107 transitions, 323 flow [2023-11-26 10:50:27,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 103.5) internal successors, (621), 6 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:27,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:27,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:27,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-26 10:50:27,327 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-26 10:50:27,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:27,328 INFO L85 PathProgramCache]: Analyzing trace with hash 341733155, now seen corresponding path program 1 times [2023-11-26 10:50:27,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:27,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058839552] [2023-11-26 10:50:27,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:27,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:27,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:27,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058839552] [2023-11-26 10:50:27,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058839552] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:27,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:27,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:50:27,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882815602] [2023-11-26 10:50:27,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:27,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:50:27,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:27,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:50:27,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:27,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 185 [2023-11-26 10:50:27,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 107 transitions, 323 flow. Second operand has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:27,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:27,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 185 [2023-11-26 10:50:27,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand