./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/25_stack_longer-1-pthread.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_33775e90-feb3-4683-81ce-081e70e25c03/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33775e90-feb3-4683-81ce-081e70e25c03/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33775e90-feb3-4683-81ce-081e70e25c03/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33775e90-feb3-4683-81ce-081e70e25c03/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/25_stack_longer-1-pthread.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33775e90-feb3-4683-81ce-081e70e25c03/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33775e90-feb3-4683-81ce-081e70e25c03/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d8aeba05368f3114a9c95156cfeec5f871d57fefc291ffe35d850d07bff2e31c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:48:59,532 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:48:59,603 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33775e90-feb3-4683-81ce-081e70e25c03/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:48:59,609 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:48:59,610 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:48:59,637 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:48:59,638 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:48:59,639 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:48:59,640 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:48:59,640 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:48:59,641 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:48:59,641 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:48:59,642 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:48:59,643 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:48:59,643 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:48:59,644 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:48:59,644 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:48:59,645 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:48:59,645 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:48:59,646 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:48:59,646 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:48:59,647 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:48:59,648 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:48:59,648 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:48:59,648 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:48:59,649 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:48:59,649 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:48:59,650 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:48:59,650 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:48:59,651 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:48:59,651 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:48:59,652 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:48:59,668 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:48:59,668 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:48:59,668 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:48:59,669 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:48:59,669 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:48:59,669 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:48:59,669 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:48:59,670 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:48:59,670 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:48:59,671 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_33775e90-feb3-4683-81ce-081e70e25c03/bin/uautomizer-verify-NlZe1sFDwI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33775e90-feb3-4683-81ce-081e70e25c03/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8aeba05368f3114a9c95156cfeec5f871d57fefc291ffe35d850d07bff2e31c [2023-11-24 21:49:00,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:49:00,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:49:00,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:49:00,043 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:49:00,044 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:49:00,045 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33775e90-feb3-4683-81ce-081e70e25c03/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread-ext/25_stack_longer-1-pthread.i [2023-11-24 21:49:03,064 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:49:03,347 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:49:03,348 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33775e90-feb3-4683-81ce-081e70e25c03/sv-benchmarks/c/pthread-ext/25_stack_longer-1-pthread.i [2023-11-24 21:49:03,364 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33775e90-feb3-4683-81ce-081e70e25c03/bin/uautomizer-verify-NlZe1sFDwI/data/9c0d4cae4/b4a14b8b50e34601952f3329d9526899/FLAGded50f072 [2023-11-24 21:49:03,378 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33775e90-feb3-4683-81ce-081e70e25c03/bin/uautomizer-verify-NlZe1sFDwI/data/9c0d4cae4/b4a14b8b50e34601952f3329d9526899 [2023-11-24 21:49:03,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:49:03,382 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:49:03,384 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:49:03,395 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:49:03,400 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:49:03,401 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:49:03" (1/1) ... [2023-11-24 21:49:03,402 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79a098ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:49:03, skipping insertion in model container [2023-11-24 21:49:03,402 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:49:03" (1/1) ... [2023-11-24 21:49:03,448 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:49:03,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:49:03,853 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:49:03,932 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:49:03,992 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:49:03,992 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:49:04,000 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:49:04,001 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:49:04 WrapperNode [2023-11-24 21:49:04,001 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:49:04,002 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:49:04,003 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:49:04,004 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:49:04,012 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:49:04" (1/1) ... [2023-11-24 21:49:04,044 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:49:04" (1/1) ... [2023-11-24 21:49:04,093 INFO L138 Inliner]: procedures = 172, calls = 39, calls flagged for inlining = 10, calls inlined = 9, statements flattened = 138 [2023-11-24 21:49:04,094 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:49:04,095 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:49:04,095 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:49:04,095 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:49:04,108 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:49:04" (1/1) ... [2023-11-24 21:49:04,108 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:49:04" (1/1) ... [2023-11-24 21:49:04,123 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:49:04" (1/1) ... [2023-11-24 21:49:04,149 INFO L175 MemorySlicer]: Split 13 memory accesses to 4 slices as follows [2, 5, 5, 1]. 38 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5, 0]. The 1 writes are split as follows [0, 0, 0, 1]. [2023-11-24 21:49:04,158 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:49:04" (1/1) ... [2023-11-24 21:49:04,158 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:49:04" (1/1) ... [2023-11-24 21:49:04,165 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:49:04" (1/1) ... [2023-11-24 21:49:04,177 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:49:04" (1/1) ... [2023-11-24 21:49:04,180 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:49:04" (1/1) ... [2023-11-24 21:49:04,186 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:49:04" (1/1) ... [2023-11-24 21:49:04,190 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:49:04,197 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:49:04,197 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:49:04,197 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:49:04,198 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:49:04" (1/1) ... [2023-11-24 21:49:04,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:49:04,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33775e90-feb3-4683-81ce-081e70e25c03/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:04,296 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33775e90-feb3-4683-81ce-081e70e25c03/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:49:04,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33775e90-feb3-4683-81ce-081e70e25c03/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:49:04,339 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-24 21:49:04,339 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-24 21:49:04,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:49:04,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:49:04,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:49:04,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:49:04,340 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-24 21:49:04,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 21:49:04,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:49:04,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:49:04,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:49:04,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:49:04,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:49:04,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:49:04,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:49:04,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 21:49:04,345 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-24 21:49:04,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:49:04,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:49:04,350 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:49:04,490 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:49:04,493 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:49:04,839 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:49:05,053 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:49:05,053 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 21:49:05,054 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:49:05 BoogieIcfgContainer [2023-11-24 21:49:05,054 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:49:05,057 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:49:05,057 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:49:05,061 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:49:05,061 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:49:03" (1/3) ... [2023-11-24 21:49:05,062 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dcaf702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:49:05, skipping insertion in model container [2023-11-24 21:49:05,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:49:04" (2/3) ... [2023-11-24 21:49:05,063 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dcaf702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:49:05, skipping insertion in model container [2023-11-24 21:49:05,063 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:49:05" (3/3) ... [2023-11-24 21:49:05,064 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longer-1-pthread.i [2023-11-24 21:49:05,086 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:49:05,086 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-24 21:49:05,086 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:49:05,153 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:49:05,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 44 transitions, 92 flow [2023-11-24 21:49:05,249 INFO L124 PetriNetUnfolderBase]: 4/51 cut-off events. [2023-11-24 21:49:05,250 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:49:05,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 51 events. 4/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 73 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2023-11-24 21:49:05,257 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 44 transitions, 92 flow [2023-11-24 21:49:05,262 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 44 transitions, 92 flow [2023-11-24 21:49:05,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:49:05,286 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;@b4e0b67, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:49:05,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-24 21:49:05,296 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:49:05,296 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 21:49:05,296 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:49:05,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:05,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:49:05,297 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONARRAY_INDEX, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:49:05,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:05,302 INFO L85 PathProgramCache]: Analyzing trace with hash 408259, now seen corresponding path program 1 times [2023-11-24 21:49:05,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:05,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937648169] [2023-11-24 21:49:05,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:05,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:05,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:05,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937648169] [2023-11-24 21:49:05,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937648169] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:05,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:05,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:49:05,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771917696] [2023-11-24 21:49:05,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:05,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:49:05,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:05,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:49:05,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:05,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2023-11-24 21:49:05,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:05,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:49:05,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2023-11-24 21:49:05,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:49:05,964 INFO L124 PetriNetUnfolderBase]: 72/197 cut-off events. [2023-11-24 21:49:05,965 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:49:05,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 197 events. 72/197 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 579 event pairs, 60 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 341. Up to 155 conditions per place. [2023-11-24 21:49:05,982 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 26 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-11-24 21:49:05,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 39 transitions, 136 flow [2023-11-24 21:49:05,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:49:05,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:49:05,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2023-11-24 21:49:05,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2023-11-24 21:49:05,997 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 69 transitions. [2023-11-24 21:49:05,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 69 transitions. [2023-11-24 21:49:05,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:49:06,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 69 transitions. [2023-11-24 21:49:06,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:06,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:06,011 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:06,012 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 92 flow. Second operand 3 states and 69 transitions. [2023-11-24 21:49:06,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 39 transitions, 136 flow [2023-11-24 21:49:06,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 136 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:49:06,019 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 84 flow [2023-11-24 21:49:06,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-11-24 21:49:06,025 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2023-11-24 21:49:06,025 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 84 flow [2023-11-24 21:49:06,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:06,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:06,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:49:06,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:49:06,027 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONARRAY_INDEX, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:49:06,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:06,028 INFO L85 PathProgramCache]: Analyzing trace with hash 408260, now seen corresponding path program 1 times [2023-11-24 21:49:06,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:06,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890421729] [2023-11-24 21:49:06,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:06,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:06,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:06,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890421729] [2023-11-24 21:49:06,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890421729] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:06,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:06,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:49:06,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922935527] [2023-11-24 21:49:06,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:06,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:49:06,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:06,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:49:06,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:06,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2023-11-24 21:49:06,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:06,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:49:06,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2023-11-24 21:49:06,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:49:06,294 INFO L124 PetriNetUnfolderBase]: 49/144 cut-off events. [2023-11-24 21:49:06,295 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 21:49:06,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 144 events. 49/144 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 361 event pairs, 40 based on Foata normal form. 22/160 useless extension candidates. Maximal degree in co-relation 255. Up to 111 conditions per place. [2023-11-24 21:49:06,297 INFO L140 encePairwiseOnDemand]: 42/44 looper letters, 25 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-11-24 21:49:06,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 134 flow [2023-11-24 21:49:06,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:49:06,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:49:06,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2023-11-24 21:49:06,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2023-11-24 21:49:06,300 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 69 transitions. [2023-11-24 21:49:06,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 69 transitions. [2023-11-24 21:49:06,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:49:06,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 69 transitions. [2023-11-24 21:49:06,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:06,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:06,303 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:06,303 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 84 flow. Second operand 3 states and 69 transitions. [2023-11-24 21:49:06,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 134 flow [2023-11-24 21:49:06,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 38 transitions, 133 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:49:06,306 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 83 flow [2023-11-24 21:49:06,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2023-11-24 21:49:06,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2023-11-24 21:49:06,307 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 83 flow [2023-11-24 21:49:06,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:06,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:06,308 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-24 21:49:06,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:49:06,309 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONARRAY_INDEX, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:49:06,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:06,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1874988019, now seen corresponding path program 1 times [2023-11-24 21:49:06,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:06,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038367540] [2023-11-24 21:49:06,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:06,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:49:06,333 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 21:49:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:49:06,400 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 21:49:06,400 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 21:49:06,403 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-24 21:49:06,405 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (8 of 10 remaining) [2023-11-24 21:49:06,406 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 10 remaining) [2023-11-24 21:49:06,406 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (6 of 10 remaining) [2023-11-24 21:49:06,406 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-11-24 21:49:06,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-11-24 21:49:06,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-11-24 21:49:06,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (2 of 10 remaining) [2023-11-24 21:49:06,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2023-11-24 21:49:06,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (0 of 10 remaining) [2023-11-24 21:49:06,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:49:06,410 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-24 21:49:06,413 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 21:49:06,413 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-24 21:49:06,493 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:49:06,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 78 transitions, 166 flow [2023-11-24 21:49:06,526 INFO L124 PetriNetUnfolderBase]: 8/93 cut-off events. [2023-11-24 21:49:06,527 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:49:06,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 93 events. 8/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 213 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 74. Up to 3 conditions per place. [2023-11-24 21:49:06,531 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 78 transitions, 166 flow [2023-11-24 21:49:06,534 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 78 transitions, 166 flow [2023-11-24 21:49:06,536 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:49:06,543 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;@b4e0b67, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:49:06,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-11-24 21:49:06,545 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:49:06,545 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 21:49:06,545 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:49:06,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:06,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:49:06,546 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONARRAY_INDEX, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:49:06,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:06,547 INFO L85 PathProgramCache]: Analyzing trace with hash 485713, now seen corresponding path program 1 times [2023-11-24 21:49:06,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:06,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354725646] [2023-11-24 21:49:06,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:06,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:06,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:06,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354725646] [2023-11-24 21:49:06,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354725646] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:06,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:06,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:49:06,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16492381] [2023-11-24 21:49:06,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:06,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:49:06,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:06,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:49:06,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:06,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 78 [2023-11-24 21:49:06,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:06,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:49:06,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 78 [2023-11-24 21:49:06,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:49:07,825 INFO L124 PetriNetUnfolderBase]: 3436/6032 cut-off events. [2023-11-24 21:49:07,825 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-11-24 21:49:07,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11296 conditions, 6032 events. 3436/6032 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 37133 event pairs, 3000 based on Foata normal form. 0/5793 useless extension candidates. Maximal degree in co-relation 8789. Up to 5195 conditions per place. [2023-11-24 21:49:07,878 INFO L140 encePairwiseOnDemand]: 73/78 looper letters, 49 selfloop transitions, 1 changer transitions 0/72 dead transitions. [2023-11-24 21:49:07,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 72 transitions, 254 flow [2023-11-24 21:49:07,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:49:07,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:49:07,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2023-11-24 21:49:07,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2023-11-24 21:49:07,884 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 123 transitions. [2023-11-24 21:49:07,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 123 transitions. [2023-11-24 21:49:07,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:49:07,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 123 transitions. [2023-11-24 21:49:07,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:07,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:07,891 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:07,892 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 166 flow. Second operand 3 states and 123 transitions. [2023-11-24 21:49:07,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 72 transitions, 254 flow [2023-11-24 21:49:07,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 72 transitions, 254 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:49:07,898 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 156 flow [2023-11-24 21:49:07,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2023-11-24 21:49:07,901 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -2 predicate places. [2023-11-24 21:49:07,901 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 156 flow [2023-11-24 21:49:07,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:07,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:07,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:49:07,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:49:07,902 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONARRAY_INDEX, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:49:07,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:07,903 INFO L85 PathProgramCache]: Analyzing trace with hash 485714, now seen corresponding path program 1 times [2023-11-24 21:49:07,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:07,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774506089] [2023-11-24 21:49:07,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:07,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:07,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:07,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774506089] [2023-11-24 21:49:07,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774506089] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:07,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:07,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:49:07,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731061668] [2023-11-24 21:49:07,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:07,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:49:07,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:07,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:49:07,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:07,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 78 [2023-11-24 21:49:07,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:07,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:49:07,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 78 [2023-11-24 21:49:07,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:49:08,755 INFO L124 PetriNetUnfolderBase]: 2467/4418 cut-off events. [2023-11-24 21:49:08,759 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2023-11-24 21:49:08,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8275 conditions, 4418 events. 2467/4418 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 26196 event pairs, 2140 based on Foata normal form. 463/4698 useless extension candidates. Maximal degree in co-relation 8267. Up to 3786 conditions per place. [2023-11-24 21:49:08,797 INFO L140 encePairwiseOnDemand]: 76/78 looper letters, 48 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-11-24 21:49:08,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 71 transitions, 252 flow [2023-11-24 21:49:08,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:49:08,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:49:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2023-11-24 21:49:08,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213675213675214 [2023-11-24 21:49:08,802 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 122 transitions. [2023-11-24 21:49:08,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 122 transitions. [2023-11-24 21:49:08,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:49:08,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 122 transitions. [2023-11-24 21:49:08,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:08,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:08,811 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:08,812 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 156 flow. Second operand 3 states and 122 transitions. [2023-11-24 21:49:08,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 71 transitions, 252 flow [2023-11-24 21:49:08,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 251 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:49:08,815 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 155 flow [2023-11-24 21:49:08,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2023-11-24 21:49:08,817 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -2 predicate places. [2023-11-24 21:49:08,817 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 155 flow [2023-11-24 21:49:08,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:08,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:08,818 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-24 21:49:08,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:49:08,819 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONARRAY_INDEX, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-24 21:49:08,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:08,820 INFO L85 PathProgramCache]: Analyzing trace with hash 635840935, now seen corresponding path program 1 times [2023-11-24 21:49:08,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:08,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673193492] [2023-11-24 21:49:08,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:08,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:49:08,850 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 21:49:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:49:08,884 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 21:49:08,885 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 21:49:08,885 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2023-11-24 21:49:08,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (11 of 13 remaining) [2023-11-24 21:49:08,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (10 of 13 remaining) [2023-11-24 21:49:08,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (9 of 13 remaining) [2023-11-24 21:49:08,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2023-11-24 21:49:08,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2023-11-24 21:49:08,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 13 remaining) [2023-11-24 21:49:08,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (5 of 13 remaining) [2023-11-24 21:49:08,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (4 of 13 remaining) [2023-11-24 21:49:08,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (3 of 13 remaining) [2023-11-24 21:49:08,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (2 of 13 remaining) [2023-11-24 21:49:08,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (1 of 13 remaining) [2023-11-24 21:49:08,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (0 of 13 remaining) [2023-11-24 21:49:08,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:49:08,888 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-24 21:49:08,889 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 21:49:08,889 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-24 21:49:08,979 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:49:08,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 112 transitions, 242 flow [2023-11-24 21:49:09,002 INFO L124 PetriNetUnfolderBase]: 12/135 cut-off events. [2023-11-24 21:49:09,003 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-24 21:49:09,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 135 events. 12/135 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 407 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 107. Up to 4 conditions per place. [2023-11-24 21:49:09,005 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 112 transitions, 242 flow [2023-11-24 21:49:09,007 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 112 transitions, 242 flow [2023-11-24 21:49:09,010 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:49:09,014 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;@b4e0b67, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:49:09,014 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-11-24 21:49:09,016 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:49:09,016 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 21:49:09,016 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:49:09,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:09,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:49:09,017 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONARRAY_INDEX, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-24 21:49:09,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:09,018 INFO L85 PathProgramCache]: Analyzing trace with hash 596929, now seen corresponding path program 1 times [2023-11-24 21:49:09,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:09,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846994876] [2023-11-24 21:49:09,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:09,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:09,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:09,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846994876] [2023-11-24 21:49:09,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846994876] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:09,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:09,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:49:09,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923097899] [2023-11-24 21:49:09,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:09,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:49:09,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:09,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:49:09,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:09,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 112 [2023-11-24 21:49:09,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 112 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:09,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:49:09,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 112 [2023-11-24 21:49:09,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:49:28,768 INFO L124 PetriNetUnfolderBase]: 112860/167061 cut-off events. [2023-11-24 21:49:28,768 INFO L125 PetriNetUnfolderBase]: For 2885/2885 co-relation queries the response was YES. [2023-11-24 21:49:29,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318738 conditions, 167061 events. 112860/167061 cut-off events. For 2885/2885 co-relation queries the response was YES. Maximal size of possible extension queue 3248. Compared 1308698 event pairs, 100020 based on Foata normal form. 0/160206 useless extension candidates. Maximal degree in co-relation 177381. Up to 149843 conditions per place. [2023-11-24 21:49:30,237 INFO L140 encePairwiseOnDemand]: 106/112 looper letters, 72 selfloop transitions, 1 changer transitions 0/105 dead transitions. [2023-11-24 21:49:30,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 105 transitions, 374 flow [2023-11-24 21:49:30,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:49:30,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:49:30,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 177 transitions. [2023-11-24 21:49:30,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2023-11-24 21:49:30,243 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 177 transitions. [2023-11-24 21:49:30,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 177 transitions. [2023-11-24 21:49:30,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:49:30,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 177 transitions. [2023-11-24 21:49:30,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:30,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:30,247 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:30,247 INFO L175 Difference]: Start difference. First operand has 107 places, 112 transitions, 242 flow. Second operand 3 states and 177 transitions. [2023-11-24 21:49:30,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 105 transitions, 374 flow [2023-11-24 21:49:30,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 105 transitions, 372 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-24 21:49:30,260 INFO L231 Difference]: Finished difference. Result has 105 places, 105 transitions, 228 flow [2023-11-24 21:49:30,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=105, PETRI_TRANSITIONS=105} [2023-11-24 21:49:30,263 INFO L281 CegarLoopForPetriNet]: 107 programPoint places, -2 predicate places. [2023-11-24 21:49:30,264 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 105 transitions, 228 flow [2023-11-24 21:49:30,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:30,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:30,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:49:30,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:49:30,265 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONARRAY_INDEX, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-24 21:49:30,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:30,266 INFO L85 PathProgramCache]: Analyzing trace with hash 596930, now seen corresponding path program 1 times [2023-11-24 21:49:30,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:30,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057369850] [2023-11-24 21:49:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:30,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:30,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:30,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057369850] [2023-11-24 21:49:30,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057369850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:30,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:30,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:49:30,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857169436] [2023-11-24 21:49:30,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:30,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:49:30,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:30,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:49:30,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:30,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 112 [2023-11-24 21:49:30,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 105 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:30,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:49:30,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 112 [2023-11-24 21:49:30,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:49:43,067 INFO L124 PetriNetUnfolderBase]: 82330/122973 cut-off events. [2023-11-24 21:49:43,068 INFO L125 PetriNetUnfolderBase]: For 1411/1411 co-relation queries the response was YES. [2023-11-24 21:49:43,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234435 conditions, 122973 events. 82330/122973 cut-off events. For 1411/1411 co-relation queries the response was YES. Maximal size of possible extension queue 2478. Compared 945947 event pairs, 72700 based on Foata normal form. 9724/127523 useless extension candidates. Maximal degree in co-relation 234426. Up to 110067 conditions per place. [2023-11-24 21:49:44,325 INFO L140 encePairwiseOnDemand]: 110/112 looper letters, 71 selfloop transitions, 1 changer transitions 0/104 dead transitions. [2023-11-24 21:49:44,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 104 transitions, 370 flow [2023-11-24 21:49:44,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:49:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:49:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 175 transitions. [2023-11-24 21:49:44,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2023-11-24 21:49:44,327 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 175 transitions. [2023-11-24 21:49:44,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 175 transitions. [2023-11-24 21:49:44,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:49:44,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 175 transitions. [2023-11-24 21:49:44,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:44,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:44,330 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:44,331 INFO L175 Difference]: Start difference. First operand has 105 places, 105 transitions, 228 flow. Second operand 3 states and 175 transitions. [2023-11-24 21:49:44,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 104 transitions, 370 flow [2023-11-24 21:49:44,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 104 transitions, 369 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:49:44,340 INFO L231 Difference]: Finished difference. Result has 105 places, 104 transitions, 227 flow [2023-11-24 21:49:44,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=227, PETRI_PLACES=105, PETRI_TRANSITIONS=104} [2023-11-24 21:49:44,343 INFO L281 CegarLoopForPetriNet]: 107 programPoint places, -2 predicate places. [2023-11-24 21:49:44,343 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 104 transitions, 227 flow [2023-11-24 21:49:44,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:44,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:44,344 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2023-11-24 21:49:44,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:49:44,344 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONARRAY_INDEX, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-24 21:49:44,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:44,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1289968482, now seen corresponding path program 1 times [2023-11-24 21:49:44,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:44,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482345061] [2023-11-24 21:49:44,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:44,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:49:44,392 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 21:49:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:49:44,411 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 21:49:44,412 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 21:49:44,412 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 16 remaining) [2023-11-24 21:49:44,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (14 of 16 remaining) [2023-11-24 21:49:44,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (13 of 16 remaining) [2023-11-24 21:49:44,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (12 of 16 remaining) [2023-11-24 21:49:44,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-11-24 21:49:44,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-11-24 21:49:44,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (9 of 16 remaining) [2023-11-24 21:49:44,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (8 of 16 remaining) [2023-11-24 21:49:44,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 16 remaining) [2023-11-24 21:49:44,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (6 of 16 remaining) [2023-11-24 21:49:44,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (5 of 16 remaining) [2023-11-24 21:49:44,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (4 of 16 remaining) [2023-11-24 21:49:44,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (3 of 16 remaining) [2023-11-24 21:49:44,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONARRAY_INDEX (2 of 16 remaining) [2023-11-24 21:49:44,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (1 of 16 remaining) [2023-11-24 21:49:44,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONARRAY_INDEX (0 of 16 remaining) [2023-11-24 21:49:44,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:49:44,416 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-24 21:49:44,418 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 21:49:44,418 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-24 21:49:44,512 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:49:44,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 146 transitions, 320 flow [2023-11-24 21:49:44,542 INFO L124 PetriNetUnfolderBase]: 16/177 cut-off events. [2023-11-24 21:49:44,542 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-24 21:49:44,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 177 events. 16/177 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 619 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 147. Up to 5 conditions per place. [2023-11-24 21:49:44,544 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 146 transitions, 320 flow [2023-11-24 21:49:44,548 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 146 transitions, 320 flow [2023-11-24 21:49:44,549 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:49:44,550 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;@b4e0b67, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:49:44,550 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2023-11-24 21:49:44,552 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:49:44,552 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 21:49:44,552 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:49:44,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:49:44,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:49:44,553 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONARRAY_INDEX, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK, thr1Err1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-24 21:49:44,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:44,554 INFO L85 PathProgramCache]: Analyzing trace with hash 741907, now seen corresponding path program 1 times [2023-11-24 21:49:44,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:44,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064227761] [2023-11-24 21:49:44,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:44,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:44,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:44,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:44,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064227761] [2023-11-24 21:49:44,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064227761] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:44,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:44,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:49:44,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077947524] [2023-11-24 21:49:44,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:44,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:49:44,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:44,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:49:44,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:44,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 146 [2023-11-24 21:49:44,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 146 transitions, 320 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:44,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:49:44,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 146 [2023-11-24 21:49:44,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand