./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c --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_a5df1297-303a-4d77-a40e-ae8b9d7b1cd7/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5df1297-303a-4d77-a40e-ae8b9d7b1cd7/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_a5df1297-303a-4d77-a40e-ae8b9d7b1cd7/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5df1297-303a-4d77-a40e-ae8b9d7b1cd7/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5df1297-303a-4d77-a40e-ae8b9d7b1cd7/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_a5df1297-303a-4d77-a40e-ae8b9d7b1cd7/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 504de2e820c504d0b98f5b71c19407f1b43c0dd9338639fad4f2fe6ea2f6854f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:42:55,840 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:42:55,971 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5df1297-303a-4d77-a40e-ae8b9d7b1cd7/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:42:55,976 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:42:55,977 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:42:56,033 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:42:56,035 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:42:56,036 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:42:56,037 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:42:56,042 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:42:56,043 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:42:56,044 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:42:56,045 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:42:56,046 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:42:56,047 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:42:56,047 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:42:56,048 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:42:56,048 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:42:56,048 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:42:56,049 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:42:56,049 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:42:56,050 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:42:56,050 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:42:56,051 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:42:56,051 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:42:56,051 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:42:56,052 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:42:56,052 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:42:56,053 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:42:56,053 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:42:56,055 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:42:56,055 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:42:56,055 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:42:56,056 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:42:56,063 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:42:56,063 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:42:56,063 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:42:56,063 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:42:56,064 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:42:56,064 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:42:56,064 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:42:56,064 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_a5df1297-303a-4d77-a40e-ae8b9d7b1cd7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5df1297-303a-4d77-a40e-ae8b9d7b1cd7/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 504de2e820c504d0b98f5b71c19407f1b43c0dd9338639fad4f2fe6ea2f6854f [2023-11-24 21:42:56,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:42:56,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:42:56,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:42:56,428 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:42:56,429 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:42:56,431 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5df1297-303a-4d77-a40e-ae8b9d7b1cd7/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c [2023-11-24 21:42:59,702 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:43:00,021 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:43:00,021 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5df1297-303a-4d77-a40e-ae8b9d7b1cd7/sv-benchmarks/c/weaver/parallel-barrier.wvr.c [2023-11-24 21:43:00,033 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5df1297-303a-4d77-a40e-ae8b9d7b1cd7/bin/uautomizer-verify-NlZe1sFDwI/data/5c3a0b3d6/83b9518b886a45e281867cd666e0967e/FLAGc464dd14c [2023-11-24 21:43:00,054 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5df1297-303a-4d77-a40e-ae8b9d7b1cd7/bin/uautomizer-verify-NlZe1sFDwI/data/5c3a0b3d6/83b9518b886a45e281867cd666e0967e [2023-11-24 21:43:00,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:43:00,062 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:43:00,066 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:43:00,066 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:43:00,073 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:43:00,073 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:43:00" (1/1) ... [2023-11-24 21:43:00,075 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d93887b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:00, skipping insertion in model container [2023-11-24 21:43:00,075 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:43:00" (1/1) ... [2023-11-24 21:43:00,126 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:43:00,361 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:43:00,373 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:43:00,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:43:00,420 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:43:00,420 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:43:00,429 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:43:00,429 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:00 WrapperNode [2023-11-24 21:43:00,430 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:43:00,431 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:43:00,431 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:43:00,431 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:43:00,439 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:00" (1/1) ... [2023-11-24 21:43:00,450 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:00" (1/1) ... [2023-11-24 21:43:00,482 INFO L138 Inliner]: procedures = 25, calls = 99, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 272 [2023-11-24 21:43:00,482 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:43:00,483 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:43:00,483 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:43:00,483 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:43:00,496 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:00" (1/1) ... [2023-11-24 21:43:00,499 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:00" (1/1) ... [2023-11-24 21:43:00,503 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:00" (1/1) ... [2023-11-24 21:43:00,542 INFO L175 MemorySlicer]: Split 14 memory accesses to 7 slices as follows [2, 2, 2, 2, 2, 2, 2]. 14 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [0, 2, 0, 0, 0, 0, 0]. The 6 writes are split as follows [1, 0, 1, 1, 1, 1, 1]. [2023-11-24 21:43:00,550 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:00" (1/1) ... [2023-11-24 21:43:00,550 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:00" (1/1) ... [2023-11-24 21:43:00,561 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:00" (1/1) ... [2023-11-24 21:43:00,573 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:00" (1/1) ... [2023-11-24 21:43:00,577 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:00" (1/1) ... [2023-11-24 21:43:00,583 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:00" (1/1) ... [2023-11-24 21:43:00,588 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:43:00,594 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:43:00,595 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:43:00,595 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:43:00,596 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:00" (1/1) ... [2023-11-24 21:43:00,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:43:00,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5df1297-303a-4d77-a40e-ae8b9d7b1cd7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:00,654 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5df1297-303a-4d77-a40e-ae8b9d7b1cd7/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:43:00,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5df1297-303a-4d77-a40e-ae8b9d7b1cd7/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:43:00,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:43:00,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:43:00,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:43:00,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:43:00,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:43:00,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:43:00,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 21:43:00,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-24 21:43:00,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-24 21:43:00,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:43:00,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:43:00,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:43:00,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:43:00,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 21:43:00,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-24 21:43:00,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-24 21:43:00,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 21:43:00,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 21:43:00,728 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 21:43:00,728 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 21:43:00,728 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-24 21:43:00,728 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-24 21:43:00,728 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-24 21:43:00,729 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-24 21:43:00,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:43:00,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:43:00,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:43:00,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:43:00,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 21:43:00,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-24 21:43:00,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-24 21:43:00,730 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-11-24 21:43:00,730 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-11-24 21:43:00,731 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-11-24 21:43:00,731 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-11-24 21:43:00,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 21:43:00,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 21:43:00,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:43:00,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:43:00,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:43:00,733 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:43:00,882 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:43:00,884 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:43:01,422 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:43:01,772 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:43:01,773 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-24 21:43:01,773 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:43:01 BoogieIcfgContainer [2023-11-24 21:43:01,774 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:43:01,776 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:43:01,776 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:43:01,780 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:43:01,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:43:00" (1/3) ... [2023-11-24 21:43:01,781 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f5a0181 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:43:01, skipping insertion in model container [2023-11-24 21:43:01,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:00" (2/3) ... [2023-11-24 21:43:01,782 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f5a0181 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:43:01, skipping insertion in model container [2023-11-24 21:43:01,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:43:01" (3/3) ... [2023-11-24 21:43:01,783 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-barrier.wvr.c [2023-11-24 21:43:01,804 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:43:01,804 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-24 21:43:01,804 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:43:02,005 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-11-24 21:43:02,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 123 transitions, 312 flow [2023-11-24 21:43:02,118 INFO L124 PetriNetUnfolderBase]: 4/103 cut-off events. [2023-11-24 21:43:02,118 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-24 21:43:02,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 103 events. 4/103 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 306 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 105. Up to 3 conditions per place. [2023-11-24 21:43:02,124 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 123 transitions, 312 flow [2023-11-24 21:43:02,130 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 102 transitions, 252 flow [2023-11-24 21:43:02,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:43:02,149 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;@6998186f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:43:02,149 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-24 21:43:02,153 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:43:02,153 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:43:02,154 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:43:02,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:02,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:43:02,155 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:43:02,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:02,162 INFO L85 PathProgramCache]: Analyzing trace with hash 17364, now seen corresponding path program 1 times [2023-11-24 21:43:02,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:02,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828930202] [2023-11-24 21:43:02,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:02,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:02,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:02,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828930202] [2023-11-24 21:43:02,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828930202] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:02,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:02,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:43:02,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059634403] [2023-11-24 21:43:02,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:02,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:02,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:02,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:02,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:02,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 127 [2023-11-24 21:43:02,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 102 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:02,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:02,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 127 [2023-11-24 21:43:02,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:07,106 INFO L124 PetriNetUnfolderBase]: 9843/20171 cut-off events. [2023-11-24 21:43:07,107 INFO L125 PetriNetUnfolderBase]: For 3205/3206 co-relation queries the response was YES. [2023-11-24 21:43:07,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36389 conditions, 20171 events. 9843/20171 cut-off events. For 3205/3206 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 194844 event pairs, 8538 based on Foata normal form. 2/14908 useless extension candidates. Maximal degree in co-relation 35674. Up to 12132 conditions per place. [2023-11-24 21:43:07,391 INFO L140 encePairwiseOnDemand]: 120/127 looper letters, 70 selfloop transitions, 4 changer transitions 0/134 dead transitions. [2023-11-24 21:43:07,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 134 transitions, 509 flow [2023-11-24 21:43:07,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:07,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:07,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2023-11-24 21:43:07,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7952755905511811 [2023-11-24 21:43:07,411 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2023-11-24 21:43:07,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2023-11-24 21:43:07,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:07,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2023-11-24 21:43:07,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:07,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:07,426 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:07,428 INFO L175 Difference]: Start difference. First operand has 117 places, 102 transitions, 252 flow. Second operand 3 states and 303 transitions. [2023-11-24 21:43:07,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 134 transitions, 509 flow [2023-11-24 21:43:07,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 134 transitions, 447 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-11-24 21:43:07,553 INFO L231 Difference]: Finished difference. Result has 106 places, 102 transitions, 244 flow [2023-11-24 21:43:07,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=106, PETRI_TRANSITIONS=102} [2023-11-24 21:43:07,561 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -11 predicate places. [2023-11-24 21:43:07,561 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 102 transitions, 244 flow [2023-11-24 21:43:07,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:07,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:07,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:43:07,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:43:07,563 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:43:07,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:07,565 INFO L85 PathProgramCache]: Analyzing trace with hash 17365, now seen corresponding path program 1 times [2023-11-24 21:43:07,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:07,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416009408] [2023-11-24 21:43:07,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:07,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:07,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:07,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:07,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416009408] [2023-11-24 21:43:07,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416009408] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:07,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:07,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:43:07,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997027720] [2023-11-24 21:43:07,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:07,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:07,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:07,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:07,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:07,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 127 [2023-11-24 21:43:07,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 102 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:07,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:07,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 127 [2023-11-24 21:43:07,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:10,003 INFO L124 PetriNetUnfolderBase]: 6323/13575 cut-off events. [2023-11-24 21:43:10,004 INFO L125 PetriNetUnfolderBase]: For 870/871 co-relation queries the response was YES. [2023-11-24 21:43:10,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23215 conditions, 13575 events. 6323/13575 cut-off events. For 870/871 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 126911 event pairs, 5796 based on Foata normal form. 962/10850 useless extension candidates. Maximal degree in co-relation 20718. Up to 8435 conditions per place. [2023-11-24 21:43:10,155 INFO L140 encePairwiseOnDemand]: 124/127 looper letters, 37 selfloop transitions, 1 changer transitions 0/100 dead transitions. [2023-11-24 21:43:10,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 100 transitions, 316 flow [2023-11-24 21:43:10,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:10,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:10,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2023-11-24 21:43:10,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7060367454068242 [2023-11-24 21:43:10,170 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2023-11-24 21:43:10,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2023-11-24 21:43:10,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:10,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2023-11-24 21:43:10,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:10,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:10,178 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:10,178 INFO L175 Difference]: Start difference. First operand has 106 places, 102 transitions, 244 flow. Second operand 3 states and 269 transitions. [2023-11-24 21:43:10,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 100 transitions, 316 flow [2023-11-24 21:43:10,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 100 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:10,192 INFO L231 Difference]: Finished difference. Result has 104 places, 100 transitions, 234 flow [2023-11-24 21:43:10,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=104, PETRI_TRANSITIONS=100} [2023-11-24 21:43:10,193 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -13 predicate places. [2023-11-24 21:43:10,193 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 100 transitions, 234 flow [2023-11-24 21:43:10,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:10,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:10,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:43:10,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:43:10,195 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:43:10,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:10,198 INFO L85 PathProgramCache]: Analyzing trace with hash 517919945, now seen corresponding path program 1 times [2023-11-24 21:43:10,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:10,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325076686] [2023-11-24 21:43:10,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:10,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:10,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:10,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:10,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325076686] [2023-11-24 21:43:10,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325076686] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:10,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:10,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:10,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63147748] [2023-11-24 21:43:10,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:10,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:10,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:10,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:10,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:10,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 127 [2023-11-24 21:43:10,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 100 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:10,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:10,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 127 [2023-11-24 21:43:10,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:12,883 INFO L124 PetriNetUnfolderBase]: 8764/15912 cut-off events. [2023-11-24 21:43:12,883 INFO L125 PetriNetUnfolderBase]: For 596/597 co-relation queries the response was YES. [2023-11-24 21:43:12,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28571 conditions, 15912 events. 8764/15912 cut-off events. For 596/597 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 134448 event pairs, 2624 based on Foata normal form. 0/12812 useless extension candidates. Maximal degree in co-relation 28563. Up to 10612 conditions per place. [2023-11-24 21:43:13,061 INFO L140 encePairwiseOnDemand]: 120/127 looper letters, 69 selfloop transitions, 6 changer transitions 0/133 dead transitions. [2023-11-24 21:43:13,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 133 transitions, 469 flow [2023-11-24 21:43:13,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:13,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:13,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2023-11-24 21:43:13,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7847769028871391 [2023-11-24 21:43:13,064 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2023-11-24 21:43:13,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2023-11-24 21:43:13,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:13,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2023-11-24 21:43:13,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:13,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:13,069 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:13,069 INFO L175 Difference]: Start difference. First operand has 104 places, 100 transitions, 234 flow. Second operand 3 states and 299 transitions. [2023-11-24 21:43:13,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 133 transitions, 469 flow [2023-11-24 21:43:13,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 133 transitions, 468 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:43:13,076 INFO L231 Difference]: Finished difference. Result has 107 places, 105 transitions, 287 flow [2023-11-24 21:43:13,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=287, PETRI_PLACES=107, PETRI_TRANSITIONS=105} [2023-11-24 21:43:13,079 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -10 predicate places. [2023-11-24 21:43:13,079 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 105 transitions, 287 flow [2023-11-24 21:43:13,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:13,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:13,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:43:13,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:43:13,081 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:43:13,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:13,082 INFO L85 PathProgramCache]: Analyzing trace with hash 517919946, now seen corresponding path program 1 times [2023-11-24 21:43:13,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:13,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139345899] [2023-11-24 21:43:13,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:13,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:13,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:13,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139345899] [2023-11-24 21:43:13,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139345899] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:13,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:13,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:13,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082670661] [2023-11-24 21:43:13,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:13,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:13,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:13,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:13,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:13,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 127 [2023-11-24 21:43:13,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 105 transitions, 287 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:13,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:13,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 127 [2023-11-24 21:43:13,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:15,010 INFO L124 PetriNetUnfolderBase]: 6508/13006 cut-off events. [2023-11-24 21:43:15,011 INFO L125 PetriNetUnfolderBase]: For 1623/1624 co-relation queries the response was YES. [2023-11-24 21:43:15,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23918 conditions, 13006 events. 6508/13006 cut-off events. For 1623/1624 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 114334 event pairs, 1981 based on Foata normal form. 680/11100 useless extension candidates. Maximal degree in co-relation 23909. Up to 8076 conditions per place. [2023-11-24 21:43:15,130 INFO L140 encePairwiseOnDemand]: 123/127 looper letters, 52 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2023-11-24 21:43:15,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 119 transitions, 436 flow [2023-11-24 21:43:15,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:15,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:15,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 286 transitions. [2023-11-24 21:43:15,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7506561679790026 [2023-11-24 21:43:15,133 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 286 transitions. [2023-11-24 21:43:15,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 286 transitions. [2023-11-24 21:43:15,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:15,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 286 transitions. [2023-11-24 21:43:15,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:15,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:15,137 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:15,138 INFO L175 Difference]: Start difference. First operand has 107 places, 105 transitions, 287 flow. Second operand 3 states and 286 transitions. [2023-11-24 21:43:15,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 119 transitions, 436 flow [2023-11-24 21:43:15,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 119 transitions, 424 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:15,148 INFO L231 Difference]: Finished difference. Result has 105 places, 103 transitions, 281 flow [2023-11-24 21:43:15,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=281, PETRI_PLACES=105, PETRI_TRANSITIONS=103} [2023-11-24 21:43:15,149 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -12 predicate places. [2023-11-24 21:43:15,150 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 103 transitions, 281 flow [2023-11-24 21:43:15,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:15,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:15,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:43:15,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:43:15,151 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:43:15,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:15,152 INFO L85 PathProgramCache]: Analyzing trace with hash 517917739, now seen corresponding path program 1 times [2023-11-24 21:43:15,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:15,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259092813] [2023-11-24 21:43:15,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:15,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:15,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:15,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:15,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:15,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259092813] [2023-11-24 21:43:15,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259092813] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:15,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:15,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:43:15,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672098374] [2023-11-24 21:43:15,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:15,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:15,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:15,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:15,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:15,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 127 [2023-11-24 21:43:15,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 103 transitions, 281 flow. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:15,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:15,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 127 [2023-11-24 21:43:15,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:17,201 INFO L124 PetriNetUnfolderBase]: 6957/14717 cut-off events. [2023-11-24 21:43:17,201 INFO L125 PetriNetUnfolderBase]: For 1407/1407 co-relation queries the response was YES. [2023-11-24 21:43:17,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25875 conditions, 14717 events. 6957/14717 cut-off events. For 1407/1407 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 136925 event pairs, 5663 based on Foata normal form. 0/10933 useless extension candidates. Maximal degree in co-relation 25866. Up to 8190 conditions per place. [2023-11-24 21:43:17,357 INFO L140 encePairwiseOnDemand]: 120/127 looper letters, 75 selfloop transitions, 7 changer transitions 0/140 dead transitions. [2023-11-24 21:43:17,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 140 transitions, 550 flow [2023-11-24 21:43:17,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:17,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:17,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2023-11-24 21:43:17,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7952755905511811 [2023-11-24 21:43:17,360 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2023-11-24 21:43:17,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2023-11-24 21:43:17,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:17,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2023-11-24 21:43:17,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:17,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:17,365 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:17,365 INFO L175 Difference]: Start difference. First operand has 105 places, 103 transitions, 281 flow. Second operand 3 states and 303 transitions. [2023-11-24 21:43:17,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 140 transitions, 550 flow [2023-11-24 21:43:17,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 140 transitions, 536 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:17,374 INFO L231 Difference]: Finished difference. Result has 107 places, 108 transitions, 333 flow [2023-11-24 21:43:17,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=333, PETRI_PLACES=107, PETRI_TRANSITIONS=108} [2023-11-24 21:43:17,376 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -10 predicate places. [2023-11-24 21:43:17,376 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 108 transitions, 333 flow [2023-11-24 21:43:17,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:17,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:17,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:43:17,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:43:17,378 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:43:17,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:17,378 INFO L85 PathProgramCache]: Analyzing trace with hash 517917740, now seen corresponding path program 1 times [2023-11-24 21:43:17,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:17,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172401868] [2023-11-24 21:43:17,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:17,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:17,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:17,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172401868] [2023-11-24 21:43:17,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172401868] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:17,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:17,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:43:17,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327413550] [2023-11-24 21:43:17,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:17,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:17,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:17,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:17,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:17,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 127 [2023-11-24 21:43:17,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 108 transitions, 333 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:17,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:17,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 127 [2023-11-24 21:43:17,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:19,186 INFO L124 PetriNetUnfolderBase]: 6657/14273 cut-off events. [2023-11-24 21:43:19,186 INFO L125 PetriNetUnfolderBase]: For 2092/2092 co-relation queries the response was YES. [2023-11-24 21:43:19,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25423 conditions, 14273 events. 6657/14273 cut-off events. For 2092/2092 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 133488 event pairs, 6059 based on Foata normal form. 120/10696 useless extension candidates. Maximal degree in co-relation 25411. Up to 8945 conditions per place. [2023-11-24 21:43:19,332 INFO L140 encePairwiseOnDemand]: 124/127 looper letters, 43 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2023-11-24 21:43:19,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 106 transitions, 417 flow [2023-11-24 21:43:19,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:19,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:19,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2023-11-24 21:43:19,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7060367454068242 [2023-11-24 21:43:19,337 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2023-11-24 21:43:19,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2023-11-24 21:43:19,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:19,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2023-11-24 21:43:19,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:19,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:19,342 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:19,343 INFO L175 Difference]: Start difference. First operand has 107 places, 108 transitions, 333 flow. Second operand 3 states and 269 transitions. [2023-11-24 21:43:19,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 106 transitions, 417 flow [2023-11-24 21:43:19,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 106 transitions, 403 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:19,352 INFO L231 Difference]: Finished difference. Result has 105 places, 106 transitions, 317 flow [2023-11-24 21:43:19,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=317, PETRI_PLACES=105, PETRI_TRANSITIONS=106} [2023-11-24 21:43:19,358 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -12 predicate places. [2023-11-24 21:43:19,358 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 106 transitions, 317 flow [2023-11-24 21:43:19,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:19,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:19,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:19,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:43:19,360 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:43:19,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:19,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1831191133, now seen corresponding path program 1 times [2023-11-24 21:43:19,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:19,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207321494] [2023-11-24 21:43:19,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:19,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:19,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:19,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207321494] [2023-11-24 21:43:19,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207321494] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:19,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:19,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:19,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756904865] [2023-11-24 21:43:19,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:19,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:19,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:19,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:19,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:19,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 127 [2023-11-24 21:43:19,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 106 transitions, 317 flow. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:19,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:19,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 127 [2023-11-24 21:43:19,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:21,378 INFO L124 PetriNetUnfolderBase]: 6657/13045 cut-off events. [2023-11-24 21:43:21,378 INFO L125 PetriNetUnfolderBase]: For 1576/1576 co-relation queries the response was YES. [2023-11-24 21:43:21,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24239 conditions, 13045 events. 6657/13045 cut-off events. For 1576/1576 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 112765 event pairs, 2105 based on Foata normal form. 408/11117 useless extension candidates. Maximal degree in co-relation 24227. Up to 8076 conditions per place. [2023-11-24 21:43:21,512 INFO L140 encePairwiseOnDemand]: 123/127 looper letters, 54 selfloop transitions, 6 changer transitions 0/120 dead transitions. [2023-11-24 21:43:21,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 120 transitions, 472 flow [2023-11-24 21:43:21,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:21,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:21,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 286 transitions. [2023-11-24 21:43:21,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7506561679790026 [2023-11-24 21:43:21,519 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 286 transitions. [2023-11-24 21:43:21,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 286 transitions. [2023-11-24 21:43:21,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:21,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 286 transitions. [2023-11-24 21:43:21,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:21,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:21,532 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:21,532 INFO L175 Difference]: Start difference. First operand has 105 places, 106 transitions, 317 flow. Second operand 3 states and 286 transitions. [2023-11-24 21:43:21,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 120 transitions, 472 flow [2023-11-24 21:43:21,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 120 transitions, 471 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:43:21,539 INFO L231 Difference]: Finished difference. Result has 104 places, 104 transitions, 324 flow [2023-11-24 21:43:21,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=104, PETRI_TRANSITIONS=104} [2023-11-24 21:43:21,541 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -13 predicate places. [2023-11-24 21:43:21,541 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 104 transitions, 324 flow [2023-11-24 21:43:21,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:21,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:21,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:21,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:43:21,542 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:43:21,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:21,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1831191132, now seen corresponding path program 1 times [2023-11-24 21:43:21,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:21,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602145395] [2023-11-24 21:43:21,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:21,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:21,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:21,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:21,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602145395] [2023-11-24 21:43:21,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602145395] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:21,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:21,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:21,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734117653] [2023-11-24 21:43:21,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:21,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:21,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:21,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:21,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:21,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 127 [2023-11-24 21:43:21,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 104 transitions, 324 flow. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:21,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:21,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 127 [2023-11-24 21:43:21,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:24,189 INFO L124 PetriNetUnfolderBase]: 7973/16941 cut-off events. [2023-11-24 21:43:24,190 INFO L125 PetriNetUnfolderBase]: For 1793/1793 co-relation queries the response was YES. [2023-11-24 21:43:24,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29892 conditions, 16941 events. 7973/16941 cut-off events. For 1793/1793 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 162344 event pairs, 6784 based on Foata normal form. 0/12668 useless extension candidates. Maximal degree in co-relation 29880. Up to 9417 conditions per place. [2023-11-24 21:43:24,339 INFO L140 encePairwiseOnDemand]: 120/127 looper letters, 71 selfloop transitions, 9 changer transitions 0/136 dead transitions. [2023-11-24 21:43:24,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 136 transitions, 573 flow [2023-11-24 21:43:24,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:24,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:24,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2023-11-24 21:43:24,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7847769028871391 [2023-11-24 21:43:24,347 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2023-11-24 21:43:24,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2023-11-24 21:43:24,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:24,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2023-11-24 21:43:24,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:24,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:24,357 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:24,358 INFO L175 Difference]: Start difference. First operand has 104 places, 104 transitions, 324 flow. Second operand 3 states and 299 transitions. [2023-11-24 21:43:24,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 136 transitions, 573 flow [2023-11-24 21:43:24,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 136 transitions, 557 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:24,367 INFO L231 Difference]: Finished difference. Result has 106 places, 108 transitions, 376 flow [2023-11-24 21:43:24,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=376, PETRI_PLACES=106, PETRI_TRANSITIONS=108} [2023-11-24 21:43:24,371 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -11 predicate places. [2023-11-24 21:43:24,372 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 108 transitions, 376 flow [2023-11-24 21:43:24,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:24,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:24,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:24,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:43:24,373 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:43:24,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:24,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1765471288, now seen corresponding path program 1 times [2023-11-24 21:43:24,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:24,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523631590] [2023-11-24 21:43:24,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:24,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:24,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:24,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523631590] [2023-11-24 21:43:24,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523631590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:24,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:24,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:24,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34643087] [2023-11-24 21:43:24,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:24,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:24,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:24,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:24,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:24,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 127 [2023-11-24 21:43:24,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 108 transitions, 376 flow. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:24,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:24,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 127 [2023-11-24 21:43:24,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:26,735 INFO L124 PetriNetUnfolderBase]: 9496/17515 cut-off events. [2023-11-24 21:43:26,735 INFO L125 PetriNetUnfolderBase]: For 4089/4089 co-relation queries the response was YES. [2023-11-24 21:43:26,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33360 conditions, 17515 events. 9496/17515 cut-off events. For 4089/4089 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 150536 event pairs, 2996 based on Foata normal form. 0/14247 useless extension candidates. Maximal degree in co-relation 33347. Up to 10941 conditions per place. [2023-11-24 21:43:26,863 INFO L140 encePairwiseOnDemand]: 120/127 looper letters, 75 selfloop transitions, 9 changer transitions 0/142 dead transitions. [2023-11-24 21:43:26,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 142 transitions, 661 flow [2023-11-24 21:43:26,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 298 transitions. [2023-11-24 21:43:26,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7821522309711286 [2023-11-24 21:43:26,866 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 298 transitions. [2023-11-24 21:43:26,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 298 transitions. [2023-11-24 21:43:26,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:26,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 298 transitions. [2023-11-24 21:43:26,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:26,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:26,870 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:26,870 INFO L175 Difference]: Start difference. First operand has 106 places, 108 transitions, 376 flow. Second operand 3 states and 298 transitions. [2023-11-24 21:43:26,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 142 transitions, 661 flow [2023-11-24 21:43:26,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 142 transitions, 639 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:26,887 INFO L231 Difference]: Finished difference. Result has 108 places, 115 transitions, 454 flow [2023-11-24 21:43:26,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=454, PETRI_PLACES=108, PETRI_TRANSITIONS=115} [2023-11-24 21:43:26,889 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -9 predicate places. [2023-11-24 21:43:26,890 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 115 transitions, 454 flow [2023-11-24 21:43:26,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:26,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:26,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:26,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:43:26,891 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:43:26,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:26,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1765471289, now seen corresponding path program 1 times [2023-11-24 21:43:26,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:26,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115882167] [2023-11-24 21:43:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:26,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:27,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:27,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:27,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115882167] [2023-11-24 21:43:27,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115882167] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:27,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:27,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:27,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132294545] [2023-11-24 21:43:27,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:27,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:27,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:27,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:27,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:27,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 127 [2023-11-24 21:43:27,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 115 transitions, 454 flow. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:27,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:27,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 127 [2023-11-24 21:43:27,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:28,600 INFO L124 PetriNetUnfolderBase]: 7120/13689 cut-off events. [2023-11-24 21:43:28,601 INFO L125 PetriNetUnfolderBase]: For 4673/4675 co-relation queries the response was YES. [2023-11-24 21:43:28,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27421 conditions, 13689 events. 7120/13689 cut-off events. For 4673/4675 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 115781 event pairs, 3445 based on Foata normal form. 730/12344 useless extension candidates. Maximal degree in co-relation 27407. Up to 8521 conditions per place. [2023-11-24 21:43:28,714 INFO L140 encePairwiseOnDemand]: 123/127 looper letters, 56 selfloop transitions, 10 changer transitions 0/128 dead transitions. [2023-11-24 21:43:28,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 128 transitions, 623 flow [2023-11-24 21:43:28,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:28,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:28,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2023-11-24 21:43:28,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7480314960629921 [2023-11-24 21:43:28,717 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2023-11-24 21:43:28,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2023-11-24 21:43:28,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:28,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2023-11-24 21:43:28,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:28,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:28,720 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:28,720 INFO L175 Difference]: Start difference. First operand has 108 places, 115 transitions, 454 flow. Second operand 3 states and 285 transitions. [2023-11-24 21:43:28,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 128 transitions, 623 flow [2023-11-24 21:43:28,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 128 transitions, 605 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:28,742 INFO L231 Difference]: Finished difference. Result has 106 places, 113 transitions, 452 flow [2023-11-24 21:43:28,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=452, PETRI_PLACES=106, PETRI_TRANSITIONS=113} [2023-11-24 21:43:28,743 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -11 predicate places. [2023-11-24 21:43:28,744 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 113 transitions, 452 flow [2023-11-24 21:43:28,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:28,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:28,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:28,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:43:28,745 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread4Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:43:28,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:28,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1013724110, now seen corresponding path program 1 times [2023-11-24 21:43:28,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:28,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000500417] [2023-11-24 21:43:28,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:28,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:28,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:28,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000500417] [2023-11-24 21:43:28,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000500417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:28,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:28,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:28,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350782718] [2023-11-24 21:43:28,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:28,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:28,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:28,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:28,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:28,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 127 [2023-11-24 21:43:28,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 113 transitions, 452 flow. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:28,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:28,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 127 [2023-11-24 21:43:28,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:30,409 INFO L124 PetriNetUnfolderBase]: 7120/13431 cut-off events. [2023-11-24 21:43:30,409 INFO L125 PetriNetUnfolderBase]: For 3933/3935 co-relation queries the response was YES. [2023-11-24 21:43:30,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27027 conditions, 13431 events. 7120/13431 cut-off events. For 3933/3935 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 111295 event pairs, 3445 based on Foata normal form. 438/12022 useless extension candidates. Maximal degree in co-relation 27013. Up to 8521 conditions per place. [2023-11-24 21:43:30,509 INFO L140 encePairwiseOnDemand]: 123/127 looper letters, 56 selfloop transitions, 10 changer transitions 0/126 dead transitions. [2023-11-24 21:43:30,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 126 transitions, 621 flow [2023-11-24 21:43:30,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:30,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:30,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2023-11-24 21:43:30,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7480314960629921 [2023-11-24 21:43:30,512 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2023-11-24 21:43:30,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2023-11-24 21:43:30,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:30,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2023-11-24 21:43:30,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:30,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:30,515 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:30,515 INFO L175 Difference]: Start difference. First operand has 106 places, 113 transitions, 452 flow. Second operand 3 states and 285 transitions. [2023-11-24 21:43:30,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 126 transitions, 621 flow [2023-11-24 21:43:30,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 126 transitions, 601 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:30,529 INFO L231 Difference]: Finished difference. Result has 104 places, 111 transitions, 448 flow [2023-11-24 21:43:30,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=448, PETRI_PLACES=104, PETRI_TRANSITIONS=111} [2023-11-24 21:43:30,530 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -13 predicate places. [2023-11-24 21:43:30,530 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 111 transitions, 448 flow [2023-11-24 21:43:30,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:30,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:30,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:30,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:43:30,531 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:43:30,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:30,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1013724111, now seen corresponding path program 1 times [2023-11-24 21:43:30,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:30,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006071943] [2023-11-24 21:43:30,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:30,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:30,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:30,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:30,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006071943] [2023-11-24 21:43:30,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006071943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:30,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:30,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:30,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216897245] [2023-11-24 21:43:30,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:30,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:30,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:30,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:30,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:30,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 127 [2023-11-24 21:43:30,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 111 transitions, 448 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:30,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:30,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 127 [2023-11-24 21:43:30,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:32,567 INFO L124 PetriNetUnfolderBase]: 8669/15695 cut-off events. [2023-11-24 21:43:32,568 INFO L125 PetriNetUnfolderBase]: For 4711/4711 co-relation queries the response was YES. [2023-11-24 21:43:32,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31858 conditions, 15695 events. 8669/15695 cut-off events. For 4711/4711 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 130310 event pairs, 2621 based on Foata normal form. 0/13314 useless extension candidates. Maximal degree in co-relation 31844. Up to 9840 conditions per place. [2023-11-24 21:43:32,706 INFO L140 encePairwiseOnDemand]: 120/127 looper letters, 75 selfloop transitions, 13 changer transitions 0/144 dead transitions. [2023-11-24 21:43:32,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 144 transitions, 743 flow [2023-11-24 21:43:32,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:32,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:32,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 298 transitions. [2023-11-24 21:43:32,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7821522309711286 [2023-11-24 21:43:32,709 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 298 transitions. [2023-11-24 21:43:32,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 298 transitions. [2023-11-24 21:43:32,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:32,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 298 transitions. [2023-11-24 21:43:32,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:32,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:32,712 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:32,712 INFO L175 Difference]: Start difference. First operand has 104 places, 111 transitions, 448 flow. Second operand 3 states and 298 transitions. [2023-11-24 21:43:32,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 144 transitions, 743 flow [2023-11-24 21:43:32,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 144 transitions, 715 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:32,724 INFO L231 Difference]: Finished difference. Result has 106 places, 117 transitions, 536 flow [2023-11-24 21:43:32,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=536, PETRI_PLACES=106, PETRI_TRANSITIONS=117} [2023-11-24 21:43:32,725 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -11 predicate places. [2023-11-24 21:43:32,725 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 117 transitions, 536 flow [2023-11-24 21:43:32,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:32,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:32,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:32,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:43:32,727 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:43:32,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:32,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1487123797, now seen corresponding path program 1 times [2023-11-24 21:43:32,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:32,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254968387] [2023-11-24 21:43:32,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:32,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:32,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:32,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254968387] [2023-11-24 21:43:32,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254968387] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:32,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:32,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:32,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603684048] [2023-11-24 21:43:32,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:32,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:32,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:32,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:32,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:32,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 127 [2023-11-24 21:43:32,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 117 transitions, 536 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:32,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:32,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 127 [2023-11-24 21:43:32,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:34,492 INFO L124 PetriNetUnfolderBase]: 6844/13224 cut-off events. [2023-11-24 21:43:34,492 INFO L125 PetriNetUnfolderBase]: For 6532/6532 co-relation queries the response was YES. [2023-11-24 21:43:34,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26970 conditions, 13224 events. 6844/13224 cut-off events. For 6532/6532 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 110534 event pairs, 4740 based on Foata normal form. 79/11601 useless extension candidates. Maximal degree in co-relation 26955. Up to 8329 conditions per place. [2023-11-24 21:43:34,615 INFO L140 encePairwiseOnDemand]: 124/127 looper letters, 72 selfloop transitions, 2 changer transitions 0/135 dead transitions. [2023-11-24 21:43:34,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 135 transitions, 747 flow [2023-11-24 21:43:34,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:34,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2023-11-24 21:43:34,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7611548556430446 [2023-11-24 21:43:34,618 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2023-11-24 21:43:34,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2023-11-24 21:43:34,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:34,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2023-11-24 21:43:34,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:34,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:34,623 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:34,623 INFO L175 Difference]: Start difference. First operand has 106 places, 117 transitions, 536 flow. Second operand 3 states and 290 transitions. [2023-11-24 21:43:34,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 135 transitions, 747 flow [2023-11-24 21:43:34,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 135 transitions, 717 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:34,643 INFO L231 Difference]: Finished difference. Result has 107 places, 117 transitions, 518 flow [2023-11-24 21:43:34,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=518, PETRI_PLACES=107, PETRI_TRANSITIONS=117} [2023-11-24 21:43:34,644 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -10 predicate places. [2023-11-24 21:43:34,645 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 117 transitions, 518 flow [2023-11-24 21:43:34,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:34,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:34,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:34,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:43:34,646 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:43:34,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:34,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1205056405, now seen corresponding path program 2 times [2023-11-24 21:43:34,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:34,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336253252] [2023-11-24 21:43:34,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:34,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:35,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:35,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336253252] [2023-11-24 21:43:35,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336253252] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:35,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:35,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:35,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692266236] [2023-11-24 21:43:35,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:35,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:43:35,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:35,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:43:35,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:35,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 127 [2023-11-24 21:43:35,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 117 transitions, 518 flow. Second operand has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:35,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:35,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 127 [2023-11-24 21:43:35,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:37,052 INFO L124 PetriNetUnfolderBase]: 6942/13093 cut-off events. [2023-11-24 21:43:37,052 INFO L125 PetriNetUnfolderBase]: For 5961/5961 co-relation queries the response was YES. [2023-11-24 21:43:37,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27494 conditions, 13093 events. 6942/13093 cut-off events. For 5961/5961 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 107949 event pairs, 2537 based on Foata normal form. 0/11471 useless extension candidates. Maximal degree in co-relation 27478. Up to 6536 conditions per place. [2023-11-24 21:43:37,170 INFO L140 encePairwiseOnDemand]: 120/127 looper letters, 77 selfloop transitions, 18 changer transitions 0/151 dead transitions. [2023-11-24 21:43:37,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 151 transitions, 806 flow [2023-11-24 21:43:37,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:37,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:43:37,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 378 transitions. [2023-11-24 21:43:37,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7440944881889764 [2023-11-24 21:43:37,172 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 378 transitions. [2023-11-24 21:43:37,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 378 transitions. [2023-11-24 21:43:37,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:37,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 378 transitions. [2023-11-24 21:43:37,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.5) internal successors, (378), 4 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:37,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:37,175 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:37,176 INFO L175 Difference]: Start difference. First operand has 107 places, 117 transitions, 518 flow. Second operand 4 states and 378 transitions. [2023-11-24 21:43:37,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 151 transitions, 806 flow [2023-11-24 21:43:37,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 151 transitions, 800 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:37,188 INFO L231 Difference]: Finished difference. Result has 109 places, 118 transitions, 595 flow [2023-11-24 21:43:37,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=595, PETRI_PLACES=109, PETRI_TRANSITIONS=118} [2023-11-24 21:43:37,189 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -8 predicate places. [2023-11-24 21:43:37,190 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 118 transitions, 595 flow [2023-11-24 21:43:37,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:37,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:37,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:37,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:43:37,191 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:43:37,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:37,191 INFO L85 PathProgramCache]: Analyzing trace with hash 845171704, now seen corresponding path program 1 times [2023-11-24 21:43:37,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:37,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347200045] [2023-11-24 21:43:37,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:37,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:37,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:37,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:37,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:37,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347200045] [2023-11-24 21:43:37,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347200045] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:37,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:37,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:37,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795354585] [2023-11-24 21:43:37,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:37,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:37,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:37,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:37,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:37,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 127 [2023-11-24 21:43:37,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 118 transitions, 595 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:37,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:37,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 127 [2023-11-24 21:43:37,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:38,840 INFO L124 PetriNetUnfolderBase]: 7280/13989 cut-off events. [2023-11-24 21:43:38,840 INFO L125 PetriNetUnfolderBase]: For 8800/8816 co-relation queries the response was YES. [2023-11-24 21:43:38,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29405 conditions, 13989 events. 7280/13989 cut-off events. For 8800/8816 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 118219 event pairs, 5014 based on Foata normal form. 75/12254 useless extension candidates. Maximal degree in co-relation 29386. Up to 8910 conditions per place. [2023-11-24 21:43:38,970 INFO L140 encePairwiseOnDemand]: 124/127 looper letters, 74 selfloop transitions, 3 changer transitions 0/138 dead transitions. [2023-11-24 21:43:38,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 138 transitions, 816 flow [2023-11-24 21:43:38,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:38,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:38,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 292 transitions. [2023-11-24 21:43:38,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7664041994750657 [2023-11-24 21:43:38,973 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 292 transitions. [2023-11-24 21:43:38,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 292 transitions. [2023-11-24 21:43:38,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:38,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 292 transitions. [2023-11-24 21:43:38,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:38,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:38,977 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:38,977 INFO L175 Difference]: Start difference. First operand has 109 places, 118 transitions, 595 flow. Second operand 3 states and 292 transitions. [2023-11-24 21:43:38,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 138 transitions, 816 flow [2023-11-24 21:43:39,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 138 transitions, 804 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-24 21:43:39,018 INFO L231 Difference]: Finished difference. Result has 112 places, 118 transitions, 594 flow [2023-11-24 21:43:39,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=594, PETRI_PLACES=112, PETRI_TRANSITIONS=118} [2023-11-24 21:43:39,020 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -5 predicate places. [2023-11-24 21:43:39,020 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 118 transitions, 594 flow [2023-11-24 21:43:39,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:39,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:39,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:39,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:43:39,021 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:43:39,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:39,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1114652442, now seen corresponding path program 2 times [2023-11-24 21:43:39,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:39,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829760531] [2023-11-24 21:43:39,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:39,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:39,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:39,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829760531] [2023-11-24 21:43:39,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829760531] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:39,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:39,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:43:39,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824977783] [2023-11-24 21:43:39,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:39,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:43:39,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:39,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:43:39,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:39,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 127 [2023-11-24 21:43:39,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 118 transitions, 594 flow. Second operand has 6 states, 6 states have (on average 70.66666666666667) internal successors, (424), 6 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:39,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:39,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 127 [2023-11-24 21:43:39,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:42,706 INFO L124 PetriNetUnfolderBase]: 12737/21030 cut-off events. [2023-11-24 21:43:42,706 INFO L125 PetriNetUnfolderBase]: For 12463/12469 co-relation queries the response was YES. [2023-11-24 21:43:42,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46715 conditions, 21030 events. 12737/21030 cut-off events. For 12463/12469 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 165781 event pairs, 3883 based on Foata normal form. 0/18270 useless extension candidates. Maximal degree in co-relation 46694. Up to 13377 conditions per place. [2023-11-24 21:43:42,949 INFO L140 encePairwiseOnDemand]: 117/127 looper letters, 109 selfloop transitions, 27 changer transitions 0/180 dead transitions. [2023-11-24 21:43:42,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 180 transitions, 1058 flow [2023-11-24 21:43:42,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:43:42,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:43:42,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 520 transitions. [2023-11-24 21:43:42,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6824146981627297 [2023-11-24 21:43:42,953 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 520 transitions. [2023-11-24 21:43:42,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 520 transitions. [2023-11-24 21:43:42,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:42,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 520 transitions. [2023-11-24 21:43:42,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 86.66666666666667) internal successors, (520), 6 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:42,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 127.0) internal successors, (889), 7 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:42,959 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 127.0) internal successors, (889), 7 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:42,960 INFO L175 Difference]: Start difference. First operand has 112 places, 118 transitions, 594 flow. Second operand 6 states and 520 transitions. [2023-11-24 21:43:42,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 180 transitions, 1058 flow [2023-11-24 21:43:42,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 180 transitions, 1050 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:43:42,993 INFO L231 Difference]: Finished difference. Result has 114 places, 121 transitions, 674 flow [2023-11-24 21:43:42,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=674, PETRI_PLACES=114, PETRI_TRANSITIONS=121} [2023-11-24 21:43:42,994 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -3 predicate places. [2023-11-24 21:43:42,994 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 121 transitions, 674 flow [2023-11-24 21:43:42,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 70.66666666666667) internal successors, (424), 6 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:42,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:42,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:42,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 21:43:42,996 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:43:42,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:42,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1282180958, now seen corresponding path program 1 times [2023-11-24 21:43:42,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:42,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394474768] [2023-11-24 21:43:42,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:42,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:43,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:43,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394474768] [2023-11-24 21:43:43,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394474768] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:43,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:43,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:43,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693553016] [2023-11-24 21:43:43,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:43,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:43:43,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:43,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:43:43,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:43,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 127 [2023-11-24 21:43:43,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 121 transitions, 674 flow. Second operand has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:43,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:43,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 127 [2023-11-24 21:43:43,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:45,847 INFO L124 PetriNetUnfolderBase]: 9938/17964 cut-off events. [2023-11-24 21:43:45,847 INFO L125 PetriNetUnfolderBase]: For 16484/16484 co-relation queries the response was YES. [2023-11-24 21:43:45,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39930 conditions, 17964 events. 9938/17964 cut-off events. For 16484/16484 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 149983 event pairs, 6723 based on Foata normal form. 0/15822 useless extension candidates. Maximal degree in co-relation 39908. Up to 10046 conditions per place. [2023-11-24 21:43:46,049 INFO L140 encePairwiseOnDemand]: 121/127 looper letters, 85 selfloop transitions, 24 changer transitions 0/168 dead transitions. [2023-11-24 21:43:46,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 168 transitions, 1039 flow [2023-11-24 21:43:46,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:46,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:43:46,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 390 transitions. [2023-11-24 21:43:46,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7677165354330708 [2023-11-24 21:43:46,052 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 390 transitions. [2023-11-24 21:43:46,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 390 transitions. [2023-11-24 21:43:46,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:46,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 390 transitions. [2023-11-24 21:43:46,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:46,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:46,057 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:46,057 INFO L175 Difference]: Start difference. First operand has 114 places, 121 transitions, 674 flow. Second operand 4 states and 390 transitions. [2023-11-24 21:43:46,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 168 transitions, 1039 flow [2023-11-24 21:43:46,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 168 transitions, 1037 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-24 21:43:46,141 INFO L231 Difference]: Finished difference. Result has 119 places, 124 transitions, 795 flow [2023-11-24 21:43:46,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=795, PETRI_PLACES=119, PETRI_TRANSITIONS=124} [2023-11-24 21:43:46,142 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, 2 predicate places. [2023-11-24 21:43:46,142 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 124 transitions, 795 flow [2023-11-24 21:43:46,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:46,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:46,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:46,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 21:43:46,143 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:43:46,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:46,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1238286945, now seen corresponding path program 1 times [2023-11-24 21:43:46,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:46,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579798525] [2023-11-24 21:43:46,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:46,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:46,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:46,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:46,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579798525] [2023-11-24 21:43:46,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579798525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:46,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:46,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:46,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896541403] [2023-11-24 21:43:46,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:46,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:46,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:46,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:46,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:46,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 127 [2023-11-24 21:43:46,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 124 transitions, 795 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:46,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:46,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 127 [2023-11-24 21:43:46,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:43:48,357 INFO L124 PetriNetUnfolderBase]: 5996/11493 cut-off events. [2023-11-24 21:43:48,357 INFO L125 PetriNetUnfolderBase]: For 15955/15963 co-relation queries the response was YES. [2023-11-24 21:43:48,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25819 conditions, 11493 events. 5996/11493 cut-off events. For 15955/15963 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 90918 event pairs, 3988 based on Foata normal form. 86/10608 useless extension candidates. Maximal degree in co-relation 25793. Up to 7328 conditions per place. [2023-11-24 21:43:48,487 INFO L140 encePairwiseOnDemand]: 124/127 looper letters, 75 selfloop transitions, 3 changer transitions 0/141 dead transitions. [2023-11-24 21:43:48,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 141 transitions, 1030 flow [2023-11-24 21:43:48,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:48,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:43:48,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 289 transitions. [2023-11-24 21:43:48,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7585301837270341 [2023-11-24 21:43:48,490 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 289 transitions. [2023-11-24 21:43:48,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 289 transitions. [2023-11-24 21:43:48,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:43:48,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 289 transitions. [2023-11-24 21:43:48,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:48,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:48,495 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:48,495 INFO L175 Difference]: Start difference. First operand has 119 places, 124 transitions, 795 flow. Second operand 3 states and 289 transitions. [2023-11-24 21:43:48,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 141 transitions, 1030 flow [2023-11-24 21:43:48,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 141 transitions, 1030 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:43:48,610 INFO L231 Difference]: Finished difference. Result has 122 places, 124 transitions, 806 flow [2023-11-24 21:43:48,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=806, PETRI_PLACES=122, PETRI_TRANSITIONS=124} [2023-11-24 21:43:48,611 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, 5 predicate places. [2023-11-24 21:43:48,611 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 124 transitions, 806 flow [2023-11-24 21:43:48,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:48,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:43:48,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:48,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 21:43:48,613 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:43:48,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:48,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1944934323, now seen corresponding path program 2 times [2023-11-24 21:43:48,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:48,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531927730] [2023-11-24 21:43:48,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:48,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:48,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:48,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531927730] [2023-11-24 21:43:48,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531927730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:48,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:48,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:48,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296379203] [2023-11-24 21:43:48,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:48,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:48,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:48,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:48,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:48,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 127 [2023-11-24 21:43:48,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 124 transitions, 806 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:48,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:43:48,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 127 [2023-11-24 21:43:48,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand