./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdeb676e-d584-4b32-adcd-5b07a524ced9/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdeb676e-d584-4b32-adcd-5b07a524ced9/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_bdeb676e-d584-4b32-adcd-5b07a524ced9/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdeb676e-d584-4b32-adcd-5b07a524ced9/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs-pthread.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdeb676e-d584-4b32-adcd-5b07a524ced9/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_bdeb676e-d584-4b32-adcd-5b07a524ced9/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 dbb282ba26be8214a1cf8ae9e386fa47ac739eda395572670b4579e50ef53b1a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:02:02,683 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:02:02,802 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdeb676e-d584-4b32-adcd-5b07a524ced9/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 22:02:02,814 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:02:02,815 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:02:02,858 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:02:02,859 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:02:02,859 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:02:02,860 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:02:02,865 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:02:02,866 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:02:02,867 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:02:02,868 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:02:02,870 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:02:02,870 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:02:02,871 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:02:02,871 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:02:02,872 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:02:02,872 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:02:02,873 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:02:02,873 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 22:02:02,874 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 22:02:02,874 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 22:02:02,875 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:02:02,875 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 22:02:02,876 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 22:02:02,876 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:02:02,877 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:02:02,878 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:02:02,878 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:02:02,880 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:02:02,896 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:02:02,896 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:02:02,897 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:02:02,897 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:02:02,897 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:02:02,898 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:02:02,898 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:02:02,898 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:02:02,899 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:02:02,899 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:02:02,899 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_bdeb676e-d584-4b32-adcd-5b07a524ced9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdeb676e-d584-4b32-adcd-5b07a524ced9/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dbb282ba26be8214a1cf8ae9e386fa47ac739eda395572670b4579e50ef53b1a [2023-11-24 22:02:03,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:02:03,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:02:03,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:02:03,299 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:02:03,300 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:02:03,302 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdeb676e-d584-4b32-adcd-5b07a524ced9/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs-pthread.i [2023-11-24 22:02:06,549 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:02:06,965 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:02:06,966 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdeb676e-d584-4b32-adcd-5b07a524ced9/sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs-pthread.i [2023-11-24 22:02:07,003 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdeb676e-d584-4b32-adcd-5b07a524ced9/bin/uautomizer-verify-NlZe1sFDwI/data/93f680851/435404c2d53c499880be575746ff99d0/FLAG2ae491c26 [2023-11-24 22:02:07,022 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdeb676e-d584-4b32-adcd-5b07a524ced9/bin/uautomizer-verify-NlZe1sFDwI/data/93f680851/435404c2d53c499880be575746ff99d0 [2023-11-24 22:02:07,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:02:07,030 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:02:07,034 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:02:07,034 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:02:07,040 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:02:07,041 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:02:07" (1/1) ... [2023-11-24 22:02:07,042 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46de1c02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:07, skipping insertion in model container [2023-11-24 22:02:07,042 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:02:07" (1/1) ... [2023-11-24 22:02:07,111 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:02:07,643 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:02:07,660 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:02:07,705 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:02:07,744 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:02:07,745 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:02:07,754 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:02:07,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:07 WrapperNode [2023-11-24 22:02:07,754 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:02:07,756 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:02:07,756 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:02:07,756 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:02:07,764 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:07" (1/1) ... [2023-11-24 22:02:07,780 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:07" (1/1) ... [2023-11-24 22:02:07,812 INFO L138 Inliner]: procedures = 167, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 76 [2023-11-24 22:02:07,812 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:02:07,813 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:02:07,813 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:02:07,814 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:02:07,826 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:07" (1/1) ... [2023-11-24 22:02:07,826 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:07" (1/1) ... [2023-11-24 22:02:07,830 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:07" (1/1) ... [2023-11-24 22:02:07,855 INFO L175 MemorySlicer]: Split 8 memory accesses to 3 slices as follows [2, 5, 1]. 63 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 1 writes are split as follows [0, 0, 1]. [2023-11-24 22:02:07,855 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:07" (1/1) ... [2023-11-24 22:02:07,855 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:07" (1/1) ... [2023-11-24 22:02:07,866 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:07" (1/1) ... [2023-11-24 22:02:07,869 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:07" (1/1) ... [2023-11-24 22:02:07,871 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:07" (1/1) ... [2023-11-24 22:02:07,873 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:07" (1/1) ... [2023-11-24 22:02:07,876 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:02:07,877 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:02:07,877 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:02:07,878 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:02:07,879 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:07" (1/1) ... [2023-11-24 22:02:07,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:02:07,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdeb676e-d584-4b32-adcd-5b07a524ced9/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:02:07,958 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdeb676e-d584-4b32-adcd-5b07a524ced9/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:02:08,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdeb676e-d584-4b32-adcd-5b07a524ced9/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:02:08,055 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-24 22:02:08,056 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-24 22:02:08,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 22:02:08,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 22:02:08,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 22:02:08,056 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-24 22:02:08,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 22:02:08,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:02:08,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 22:02:08,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 22:02:08,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:02:08,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 22:02:08,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 22:02:08,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 22:02:08,060 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-24 22:02:08,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:02:08,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:02:08,061 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 22:02:08,208 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:02:08,211 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:02:08,431 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:02:08,617 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:02:08,617 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 22:02:08,618 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:02:08 BoogieIcfgContainer [2023-11-24 22:02:08,618 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:02:08,621 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:02:08,621 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:02:08,625 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:02:08,625 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:02:07" (1/3) ... [2023-11-24 22:02:08,626 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf92c1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:02:08, skipping insertion in model container [2023-11-24 22:02:08,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:02:07" (2/3) ... [2023-11-24 22:02:08,627 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf92c1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:02:08, skipping insertion in model container [2023-11-24 22:02:08,627 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:02:08" (3/3) ... [2023-11-24 22:02:08,629 INFO L112 eAbstractionObserver]: Analyzing ICFG 39_rand_lock_p0_vs-pthread.i [2023-11-24 22:02:08,651 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:02:08,651 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-24 22:02:08,652 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 22:02:08,724 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 22:02:08,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 24 transitions, 52 flow [2023-11-24 22:02:08,830 INFO L124 PetriNetUnfolderBase]: 2/31 cut-off events. [2023-11-24 22:02:08,830 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:02:08,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 31 events. 2/31 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 60 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2023-11-24 22:02:08,834 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 24 transitions, 52 flow [2023-11-24 22:02:08,843 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 24 transitions, 52 flow [2023-11-24 22:02:08,863 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:02:08,873 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;@7786cebc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:02:08,873 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-24 22:02:08,889 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:02:08,890 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 22:02:08,890 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:02:08,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:08,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:02:08,892 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-24 22:02:08,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:08,901 INFO L85 PathProgramCache]: Analyzing trace with hash 241785, now seen corresponding path program 1 times [2023-11-24 22:02:08,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:08,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337838286] [2023-11-24 22:02:08,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:08,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:09,310 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 22:02:09,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:09,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337838286] [2023-11-24 22:02:09,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337838286] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:09,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:09,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:02:09,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396914917] [2023-11-24 22:02:09,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:09,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:09,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:09,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:09,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:09,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2023-11-24 22:02:09,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states 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 22:02:09,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:09,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2023-11-24 22:02:09,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:09,492 INFO L124 PetriNetUnfolderBase]: 31/85 cut-off events. [2023-11-24 22:02:09,492 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:02:09,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 85 events. 31/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 186 event pairs, 27 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 145. Up to 70 conditions per place. [2023-11-24 22:02:09,499 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 13 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-11-24 22:02:09,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 70 flow [2023-11-24 22:02:09,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:09,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:02:09,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 35 transitions. [2023-11-24 22:02:09,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2023-11-24 22:02:09,521 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 35 transitions. [2023-11-24 22:02:09,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 35 transitions. [2023-11-24 22:02:09,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:09,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 35 transitions. [2023-11-24 22:02:09,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 22:02:09,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 22:02:09,533 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 22:02:09,534 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 52 flow. Second operand 3 states and 35 transitions. [2023-11-24 22:02:09,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 70 flow [2023-11-24 22:02:09,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 70 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 22:02:09,540 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-11-24 22:02:09,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-11-24 22:02:09,546 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -2 predicate places. [2023-11-24 22:02:09,547 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-11-24 22:02:09,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states 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 22:02:09,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:09,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:02:09,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:02:09,551 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-24 22:02:09,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:09,552 INFO L85 PathProgramCache]: Analyzing trace with hash 241786, now seen corresponding path program 1 times [2023-11-24 22:02:09,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:09,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565247657] [2023-11-24 22:02:09,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:09,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:09,713 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 22:02:09,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:09,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565247657] [2023-11-24 22:02:09,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565247657] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:09,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:09,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:02:09,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682915161] [2023-11-24 22:02:09,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:09,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:09,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:09,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:09,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:09,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 24 [2023-11-24 22:02:09,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 22:02:09,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:09,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 24 [2023-11-24 22:02:09,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:09,791 INFO L124 PetriNetUnfolderBase]: 21/62 cut-off events. [2023-11-24 22:02:09,791 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 22:02:09,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 62 events. 21/62 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 108 event pairs, 18 based on Foata normal form. 11/67 useless extension candidates. Maximal degree in co-relation 112. Up to 50 conditions per place. [2023-11-24 22:02:09,793 INFO L140 encePairwiseOnDemand]: 22/24 looper letters, 12 selfloop transitions, 1 changer transitions 0/18 dead transitions. [2023-11-24 22:02:09,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 18 transitions, 68 flow [2023-11-24 22:02:09,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:09,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:02:09,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 35 transitions. [2023-11-24 22:02:09,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2023-11-24 22:02:09,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 35 transitions. [2023-11-24 22:02:09,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 35 transitions. [2023-11-24 22:02:09,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:09,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 35 transitions. [2023-11-24 22:02:09,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 22:02:09,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 22:02:09,808 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 22:02:09,809 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 35 transitions. [2023-11-24 22:02:09,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 18 transitions, 68 flow [2023-11-24 22:02:09,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 18 transitions, 67 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:02:09,814 INFO L231 Difference]: Finished difference. Result has 23 places, 18 transitions, 43 flow [2023-11-24 22:02:09,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=43, PETRI_PLACES=23, PETRI_TRANSITIONS=18} [2023-11-24 22:02:09,818 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -2 predicate places. [2023-11-24 22:02:09,819 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 18 transitions, 43 flow [2023-11-24 22:02:09,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 22:02:09,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:09,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 22:02:09,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 22:02:09,820 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-24 22:02:09,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:09,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1386717519, now seen corresponding path program 1 times [2023-11-24 22:02:09,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:09,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273448128] [2023-11-24 22:02:09,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:09,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:09,905 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 22:02:09,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:09,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273448128] [2023-11-24 22:02:09,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273448128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:09,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:09,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:02:09,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034870913] [2023-11-24 22:02:09,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:09,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:09,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:09,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:09,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:09,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 24 [2023-11-24 22:02:09,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 43 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states 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 22:02:09,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:09,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 24 [2023-11-24 22:02:09,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:09,964 INFO L124 PetriNetUnfolderBase]: 21/59 cut-off events. [2023-11-24 22:02:09,965 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 22:02:09,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 59 events. 21/59 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 91 event pairs, 12 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 109. Up to 35 conditions per place. [2023-11-24 22:02:09,968 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 13 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2023-11-24 22:02:09,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 19 transitions, 75 flow [2023-11-24 22:02:09,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:09,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:02:09,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2023-11-24 22:02:09,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2023-11-24 22:02:09,972 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 37 transitions. [2023-11-24 22:02:09,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 37 transitions. [2023-11-24 22:02:09,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:09,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 37 transitions. [2023-11-24 22:02:09,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states 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 22:02:09,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 22:02:09,976 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 22:02:09,976 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 43 flow. Second operand 3 states and 37 transitions. [2023-11-24 22:02:09,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 19 transitions, 75 flow [2023-11-24 22:02:09,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 74 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:02:09,983 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 44 flow [2023-11-24 22:02:09,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-11-24 22:02:09,987 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -2 predicate places. [2023-11-24 22:02:09,987 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 44 flow [2023-11-24 22:02:09,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states 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 22:02:09,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:09,988 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-24 22:02:09,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 22:02:09,989 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-24 22:02:09,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:09,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1195777091, now seen corresponding path program 1 times [2023-11-24 22:02:09,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:09,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706885431] [2023-11-24 22:02:09,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:09,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:02:10,051 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 22:02:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:02:10,104 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 22:02:10,104 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 22:02:10,106 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-24 22:02:10,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2023-11-24 22:02:10,113 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-11-24 22:02:10,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-11-24 22:02:10,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2023-11-24 22:02:10,116 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2023-11-24 22:02:10,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 22:02:10,117 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-24 22:02:10,123 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 22:02:10,123 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-24 22:02:10,163 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 22:02:10,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 38 transitions, 86 flow [2023-11-24 22:02:10,193 INFO L124 PetriNetUnfolderBase]: 4/53 cut-off events. [2023-11-24 22:02:10,194 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 22:02:10,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 53 events. 4/53 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 129 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 34. Up to 3 conditions per place. [2023-11-24 22:02:10,195 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 38 transitions, 86 flow [2023-11-24 22:02:10,197 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 38 transitions, 86 flow [2023-11-24 22:02:10,201 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:02:10,202 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;@7786cebc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:02:10,202 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-24 22:02:10,205 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:02:10,206 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 22:02:10,206 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:02:10,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:10,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:02:10,207 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 22:02:10,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:10,208 INFO L85 PathProgramCache]: Analyzing trace with hash 279519, now seen corresponding path program 1 times [2023-11-24 22:02:10,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:10,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252453263] [2023-11-24 22:02:10,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:10,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:10,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:10,298 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 22:02:10,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:10,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252453263] [2023-11-24 22:02:10,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252453263] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:10,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:10,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:02:10,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76939772] [2023-11-24 22:02:10,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:10,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:10,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:10,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:10,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:10,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2023-11-24 22:02:10,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 22:02:10,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:10,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2023-11-24 22:02:10,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:10,566 INFO L124 PetriNetUnfolderBase]: 705/1256 cut-off events. [2023-11-24 22:02:10,567 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-11-24 22:02:10,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2392 conditions, 1256 events. 705/1256 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5815 event pairs, 657 based on Foata normal form. 0/1104 useless extension candidates. Maximal degree in co-relation 1277. Up to 1100 conditions per place. [2023-11-24 22:02:10,583 INFO L140 encePairwiseOnDemand]: 33/38 looper letters, 23 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-11-24 22:02:10,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 122 flow [2023-11-24 22:02:10,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:10,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:02:10,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2023-11-24 22:02:10,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4824561403508772 [2023-11-24 22:02:10,592 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 55 transitions. [2023-11-24 22:02:10,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 55 transitions. [2023-11-24 22:02:10,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:10,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 55 transitions. [2023-11-24 22:02:10,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 22:02:10,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 22:02:10,598 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 22:02:10,604 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 86 flow. Second operand 3 states and 55 transitions. [2023-11-24 22:02:10,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 122 flow [2023-11-24 22:02:10,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 122 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 22:02:10,608 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 76 flow [2023-11-24 22:02:10,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-11-24 22:02:10,610 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2023-11-24 22:02:10,611 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 76 flow [2023-11-24 22:02:10,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 22:02:10,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:10,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:02:10,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 22:02:10,614 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 22:02:10,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:10,616 INFO L85 PathProgramCache]: Analyzing trace with hash 279520, now seen corresponding path program 1 times [2023-11-24 22:02:10,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:10,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842200806] [2023-11-24 22:02:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:10,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:10,706 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 22:02:10,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:10,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842200806] [2023-11-24 22:02:10,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842200806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:10,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:10,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:02:10,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634349949] [2023-11-24 22:02:10,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:10,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:10,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:10,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:10,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:10,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 38 [2023-11-24 22:02:10,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states 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 22:02:10,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:10,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 38 [2023-11-24 22:02:10,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:10,897 INFO L124 PetriNetUnfolderBase]: 504/912 cut-off events. [2023-11-24 22:02:10,897 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-24 22:02:10,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1750 conditions, 912 events. 504/912 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3949 event pairs, 468 based on Foata normal form. 111/909 useless extension candidates. Maximal degree in co-relation 1742. Up to 800 conditions per place. [2023-11-24 22:02:10,905 INFO L140 encePairwiseOnDemand]: 36/38 looper letters, 22 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-11-24 22:02:10,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 31 transitions, 120 flow [2023-11-24 22:02:10,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:10,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:02:10,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2023-11-24 22:02:10,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2023-11-24 22:02:10,907 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 54 transitions. [2023-11-24 22:02:10,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 54 transitions. [2023-11-24 22:02:10,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:10,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 54 transitions. [2023-11-24 22:02:10,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 22:02:10,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 22:02:10,909 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 22:02:10,910 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 76 flow. Second operand 3 states and 54 transitions. [2023-11-24 22:02:10,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 31 transitions, 120 flow [2023-11-24 22:02:10,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 31 transitions, 119 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:02:10,911 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 75 flow [2023-11-24 22:02:10,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-11-24 22:02:10,912 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2023-11-24 22:02:10,913 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 75 flow [2023-11-24 22:02:10,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states 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 22:02:10,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:10,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 22:02:10,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 22:02:10,914 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 22:02:10,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:10,914 INFO L85 PathProgramCache]: Analyzing trace with hash -262533282, now seen corresponding path program 1 times [2023-11-24 22:02:10,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:10,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601305931] [2023-11-24 22:02:10,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:10,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:10,948 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 22:02:10,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:10,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601305931] [2023-11-24 22:02:10,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601305931] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:10,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:10,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:02:10,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32252674] [2023-11-24 22:02:10,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:10,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:10,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:10,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:10,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:10,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2023-11-24 22:02:10,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 22:02:10,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:10,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2023-11-24 22:02:10,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:11,120 INFO L124 PetriNetUnfolderBase]: 522/906 cut-off events. [2023-11-24 22:02:11,120 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-24 22:02:11,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1787 conditions, 906 events. 522/906 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3634 event pairs, 252 based on Foata normal form. 0/855 useless extension candidates. Maximal degree in co-relation 1778. Up to 451 conditions per place. [2023-11-24 22:02:11,129 INFO L140 encePairwiseOnDemand]: 33/38 looper letters, 39 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2023-11-24 22:02:11,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 48 transitions, 198 flow [2023-11-24 22:02:11,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:11,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:02:11,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2023-11-24 22:02:11,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6228070175438597 [2023-11-24 22:02:11,131 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 71 transitions. [2023-11-24 22:02:11,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 71 transitions. [2023-11-24 22:02:11,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:11,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 71 transitions. [2023-11-24 22:02:11,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 22:02:11,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 22:02:11,134 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 22:02:11,134 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 75 flow. Second operand 3 states and 71 transitions. [2023-11-24 22:02:11,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 48 transitions, 198 flow [2023-11-24 22:02:11,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 48 transitions, 197 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:02:11,137 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 95 flow [2023-11-24 22:02:11,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-11-24 22:02:11,138 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2023-11-24 22:02:11,138 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 95 flow [2023-11-24 22:02:11,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 22:02:11,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:11,139 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-24 22:02:11,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 22:02:11,139 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 22:02:11,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:11,140 INFO L85 PathProgramCache]: Analyzing trace with hash -769341005, now seen corresponding path program 1 times [2023-11-24 22:02:11,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:11,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160197551] [2023-11-24 22:02:11,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:11,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:02:11,157 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 22:02:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:02:11,173 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 22:02:11,173 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 22:02:11,173 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-24 22:02:11,174 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2023-11-24 22:02:11,174 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-24 22:02:11,174 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-24 22:02:11,174 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-11-24 22:02:11,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-24 22:02:11,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-24 22:02:11,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 22:02:11,175 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-24 22:02:11,176 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 22:02:11,176 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-24 22:02:11,208 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 22:02:11,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 52 transitions, 122 flow [2023-11-24 22:02:11,220 INFO L124 PetriNetUnfolderBase]: 6/75 cut-off events. [2023-11-24 22:02:11,220 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-24 22:02:11,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 75 events. 6/75 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 207 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 60. Up to 4 conditions per place. [2023-11-24 22:02:11,221 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 52 transitions, 122 flow [2023-11-24 22:02:11,223 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 52 transitions, 122 flow [2023-11-24 22:02:11,224 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:02:11,225 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;@7786cebc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:02:11,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-24 22:02:11,226 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:02:11,227 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 22:02:11,227 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:02:11,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:11,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:02:11,227 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-24 22:02:11,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:11,228 INFO L85 PathProgramCache]: Analyzing trace with hash 331155, now seen corresponding path program 1 times [2023-11-24 22:02:11,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:11,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441777269] [2023-11-24 22:02:11,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:11,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:11,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:11,258 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 22:02:11,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:11,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441777269] [2023-11-24 22:02:11,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441777269] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:11,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:11,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:02:11,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508833660] [2023-11-24 22:02:11,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:11,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:11,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:11,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:11,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:11,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2023-11-24 22:02:11,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 22:02:11,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:11,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2023-11-24 22:02:11,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:13,769 INFO L124 PetriNetUnfolderBase]: 11037/16537 cut-off events. [2023-11-24 22:02:13,769 INFO L125 PetriNetUnfolderBase]: For 748/748 co-relation queries the response was YES. [2023-11-24 22:02:13,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31974 conditions, 16537 events. 11037/16537 cut-off events. For 748/748 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 98980 event pairs, 10557 based on Foata normal form. 0/14559 useless extension candidates. Maximal degree in co-relation 3009. Up to 15000 conditions per place. [2023-11-24 22:02:13,967 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 33 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-11-24 22:02:13,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 176 flow [2023-11-24 22:02:13,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:13,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:02:13,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2023-11-24 22:02:13,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2023-11-24 22:02:13,971 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 75 transitions. [2023-11-24 22:02:13,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 75 transitions. [2023-11-24 22:02:13,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:13,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 75 transitions. [2023-11-24 22:02:13,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 22:02:13,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 22:02:13,975 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 22:02:13,976 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 122 flow. Second operand 3 states and 75 transitions. [2023-11-24 22:02:13,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 176 flow [2023-11-24 22:02:13,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 45 transitions, 174 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-24 22:02:13,981 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 108 flow [2023-11-24 22:02:13,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-11-24 22:02:13,983 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -2 predicate places. [2023-11-24 22:02:13,983 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 108 flow [2023-11-24 22:02:13,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 22:02:13,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:13,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:02:13,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 22:02:13,984 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-24 22:02:13,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:13,985 INFO L85 PathProgramCache]: Analyzing trace with hash 331156, now seen corresponding path program 1 times [2023-11-24 22:02:13,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:13,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353238391] [2023-11-24 22:02:13,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:13,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:14,075 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 22:02:14,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:14,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353238391] [2023-11-24 22:02:14,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353238391] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:14,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:14,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:02:14,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783109222] [2023-11-24 22:02:14,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:14,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:14,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:14,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:14,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:14,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2023-11-24 22:02:14,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 108 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 22:02:14,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:14,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2023-11-24 22:02:14,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:15,838 INFO L124 PetriNetUnfolderBase]: 8034/12103 cut-off events. [2023-11-24 22:02:15,838 INFO L125 PetriNetUnfolderBase]: For 334/334 co-relation queries the response was YES. [2023-11-24 22:02:15,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23442 conditions, 12103 events. 8034/12103 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 69879 event pairs, 7668 based on Foata normal form. 1111/11714 useless extension candidates. Maximal degree in co-relation 23433. Up to 11000 conditions per place. [2023-11-24 22:02:15,934 INFO L140 encePairwiseOnDemand]: 50/52 looper letters, 32 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-11-24 22:02:15,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 44 transitions, 172 flow [2023-11-24 22:02:15,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:15,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:02:15,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2023-11-24 22:02:15,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2023-11-24 22:02:15,938 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 73 transitions. [2023-11-24 22:02:15,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 73 transitions. [2023-11-24 22:02:15,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:15,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 73 transitions. [2023-11-24 22:02:15,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states 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 22:02:15,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 22:02:15,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 22:02:15,942 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 108 flow. Second operand 3 states and 73 transitions. [2023-11-24 22:02:15,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 44 transitions, 172 flow [2023-11-24 22:02:15,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 44 transitions, 171 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:02:15,946 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 107 flow [2023-11-24 22:02:15,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2023-11-24 22:02:15,949 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -2 predicate places. [2023-11-24 22:02:15,949 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 107 flow [2023-11-24 22:02:15,949 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 22:02:15,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:15,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 22:02:15,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 22:02:15,951 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-24 22:02:15,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:15,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1275818923, now seen corresponding path program 1 times [2023-11-24 22:02:15,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:15,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176590316] [2023-11-24 22:02:15,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:15,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:15,996 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 22:02:15,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:15,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176590316] [2023-11-24 22:02:15,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176590316] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:15,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:15,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:02:15,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400927203] [2023-11-24 22:02:15,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:15,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:15,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:15,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:15,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:16,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2023-11-24 22:02:16,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 22:02:16,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:16,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2023-11-24 22:02:16,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:17,565 INFO L124 PetriNetUnfolderBase]: 9030/13096 cut-off events. [2023-11-24 22:02:17,565 INFO L125 PetriNetUnfolderBase]: For 352/352 co-relation queries the response was YES. [2023-11-24 22:02:17,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26095 conditions, 13096 events. 9030/13096 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 69955 event pairs, 3549 based on Foata normal form. 0/12310 useless extension candidates. Maximal degree in co-relation 26085. Up to 8869 conditions per place. [2023-11-24 22:02:17,745 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 57 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2023-11-24 22:02:17,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 69 transitions, 289 flow [2023-11-24 22:02:17,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:17,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:02:17,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2023-11-24 22:02:17,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217948717948718 [2023-11-24 22:02:17,748 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 97 transitions. [2023-11-24 22:02:17,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 97 transitions. [2023-11-24 22:02:17,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:17,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 97 transitions. [2023-11-24 22:02:17,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 22:02:17,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 22:02:17,751 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 22:02:17,751 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 107 flow. Second operand 3 states and 97 transitions. [2023-11-24 22:02:17,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 69 transitions, 289 flow [2023-11-24 22:02:17,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 69 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:02:17,755 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 136 flow [2023-11-24 22:02:17,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2023-11-24 22:02:17,756 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 0 predicate places. [2023-11-24 22:02:17,756 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 136 flow [2023-11-24 22:02:17,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 22:02:17,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:17,757 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2023-11-24 22:02:17,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 22:02:17,757 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-24 22:02:17,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:17,758 INFO L85 PathProgramCache]: Analyzing trace with hash 89551300, now seen corresponding path program 1 times [2023-11-24 22:02:17,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:17,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751934555] [2023-11-24 22:02:17,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:17,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:02:17,779 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 22:02:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:02:17,808 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 22:02:17,808 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 22:02:17,809 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-24 22:02:17,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2023-11-24 22:02:17,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-11-24 22:02:17,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-11-24 22:02:17,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2023-11-24 22:02:17,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-11-24 22:02:17,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2023-11-24 22:02:17,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-11-24 22:02:17,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 22:02:17,810 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-24 22:02:17,811 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 22:02:17,811 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-24 22:02:17,863 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 22:02:17,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 66 transitions, 160 flow [2023-11-24 22:02:17,880 INFO L124 PetriNetUnfolderBase]: 8/97 cut-off events. [2023-11-24 22:02:17,881 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-24 22:02:17,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 97 events. 8/97 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 281 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 87. Up to 5 conditions per place. [2023-11-24 22:02:17,881 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 66 transitions, 160 flow [2023-11-24 22:02:17,883 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 66 transitions, 160 flow [2023-11-24 22:02:17,884 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:02:17,884 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;@7786cebc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:02:17,884 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-24 22:02:17,886 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:02:17,886 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 22:02:17,886 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:02:17,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:17,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:02:17,886 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 22:02:17,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:17,887 INFO L85 PathProgramCache]: Analyzing trace with hash 396693, now seen corresponding path program 1 times [2023-11-24 22:02:17,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:17,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042994151] [2023-11-24 22:02:17,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:17,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:02:17,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:17,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042994151] [2023-11-24 22:02:17,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042994151] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:17,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:17,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:02:17,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633649600] [2023-11-24 22:02:17,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:17,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:17,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:17,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:17,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:17,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 66 [2023-11-24 22:02:17,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 22:02:17,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:17,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 66 [2023-11-24 22:02:17,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:38,425 INFO L124 PetriNetUnfolderBase]: 150357/205352 cut-off events. [2023-11-24 22:02:38,425 INFO L125 PetriNetUnfolderBase]: For 13133/13133 co-relation queries the response was YES. [2023-11-24 22:02:39,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400790 conditions, 205352 events. 150357/205352 cut-off events. For 13133/13133 co-relation queries the response was YES. Maximal size of possible extension queue 4482. Compared 1403202 event pairs, 145557 based on Foata normal form. 0/181116 useless extension candidates. Maximal degree in co-relation 32080. Up to 190000 conditions per place. [2023-11-24 22:02:40,547 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 43 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-11-24 22:02:40,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 58 transitions, 232 flow [2023-11-24 22:02:40,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:02:40,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:02:40,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2023-11-24 22:02:40,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2023-11-24 22:02:40,549 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2023-11-24 22:02:40,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2023-11-24 22:02:40,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:02:40,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2023-11-24 22:02:40,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 22:02:40,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 22:02:40,552 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 22:02:40,552 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 160 flow. Second operand 3 states and 95 transitions. [2023-11-24 22:02:40,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 58 transitions, 232 flow [2023-11-24 22:02:40,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 58 transitions, 226 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-24 22:02:40,573 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 140 flow [2023-11-24 22:02:40,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2023-11-24 22:02:40,576 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -2 predicate places. [2023-11-24 22:02:40,576 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 140 flow [2023-11-24 22:02:40,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 22:02:40,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:02:40,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:02:40,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 22:02:40,577 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 22:02:40,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:02:40,580 INFO L85 PathProgramCache]: Analyzing trace with hash 396694, now seen corresponding path program 1 times [2023-11-24 22:02:40,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:02:40,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15129889] [2023-11-24 22:02:40,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:02:40,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:02:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:02:40,650 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 22:02:40,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:02:40,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15129889] [2023-11-24 22:02:40,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15129889] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:02:40,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:02:40,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:02:40,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141985706] [2023-11-24 22:02:40,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:02:40,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:02:40,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:02:40,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:02:40,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:02:40,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 66 [2023-11-24 22:02:40,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 22:02:40,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:02:40,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 66 [2023-11-24 22:02:40,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:02:52,709 INFO L124 PetriNetUnfolderBase]: 110334/151004 cut-off events. [2023-11-24 22:02:52,709 INFO L125 PetriNetUnfolderBase]: For 3337/3337 co-relation queries the response was YES. [2023-11-24 22:02:53,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294344 conditions, 151004 events. 110334/151004 cut-off events. For 3337/3337 co-relation queries the response was YES. Maximal size of possible extension queue 3360. Compared 1005161 event pairs, 106668 based on Foata normal form. 11111/143749 useless extension candidates. Maximal degree in co-relation 294334. Up to 140000 conditions per place.