./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe027_rmo.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b180f138-114f-472a-bb26-bbbc320b8f5c/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b180f138-114f-472a-bb26-bbbc320b8f5c/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_b180f138-114f-472a-bb26-bbbc320b8f5c/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b180f138-114f-472a-bb26-bbbc320b8f5c/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe027_rmo.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b180f138-114f-472a-bb26-bbbc320b8f5c/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_b180f138-114f-472a-bb26-bbbc320b8f5c/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 85e3ce8f111292d815206f012225ed7eff4e108dc07a389f6fa2d1590522afb0 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:56:24,711 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:56:24,821 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b180f138-114f-472a-bb26-bbbc320b8f5c/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:56:24,833 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:56:24,833 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:56:24,873 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:56:24,874 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:56:24,875 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:56:24,876 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:56:24,881 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:56:24,882 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:56:24,882 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:56:24,883 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:56:24,885 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:56:24,885 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:56:24,886 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:56:24,886 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:56:24,887 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:56:24,887 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:56:24,888 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:56:24,888 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:56:24,889 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:56:24,890 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:56:24,890 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:56:24,890 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:56:24,891 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:56:24,891 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:56:24,892 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:56:24,893 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:56:24,893 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:56:24,895 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:56:24,895 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:56:24,895 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:56:24,896 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:56:24,896 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:56:24,896 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:56:24,896 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:56:24,897 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:56:24,897 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:56:24,897 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:56:24,898 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:56:24,898 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_b180f138-114f-472a-bb26-bbbc320b8f5c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b180f138-114f-472a-bb26-bbbc320b8f5c/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85e3ce8f111292d815206f012225ed7eff4e108dc07a389f6fa2d1590522afb0 [2023-11-24 21:56:25,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:56:25,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:56:25,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:56:25,269 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:56:25,270 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:56:25,272 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b180f138-114f-472a-bb26-bbbc320b8f5c/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread-wmm/safe027_rmo.i [2023-11-24 21:56:28,324 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:56:28,682 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:56:28,682 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b180f138-114f-472a-bb26-bbbc320b8f5c/sv-benchmarks/c/pthread-wmm/safe027_rmo.i [2023-11-24 21:56:28,701 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b180f138-114f-472a-bb26-bbbc320b8f5c/bin/uautomizer-verify-NlZe1sFDwI/data/6bfbecf77/f05936e0d34448668dd318d5211d7ae9/FLAGc83e3e2fc [2023-11-24 21:56:28,715 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b180f138-114f-472a-bb26-bbbc320b8f5c/bin/uautomizer-verify-NlZe1sFDwI/data/6bfbecf77/f05936e0d34448668dd318d5211d7ae9 [2023-11-24 21:56:28,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:56:28,719 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:56:28,721 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:56:28,721 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:56:28,726 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:56:28,727 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:56:28" (1/1) ... [2023-11-24 21:56:28,728 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32de7cad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:28, skipping insertion in model container [2023-11-24 21:56:28,729 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:56:28" (1/1) ... [2023-11-24 21:56:28,786 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:56:29,255 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:56:29,268 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:56:29,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:56:29,411 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:56:29,411 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:56:29,419 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:56:29,420 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:29 WrapperNode [2023-11-24 21:56:29,420 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:56:29,421 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:56:29,421 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:56:29,422 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:56:29,430 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:29" (1/1) ... [2023-11-24 21:56:29,450 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:29" (1/1) ... [2023-11-24 21:56:29,479 INFO L138 Inliner]: procedures = 177, calls = 83, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 155 [2023-11-24 21:56:29,480 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:56:29,481 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:56:29,481 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:56:29,481 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:56:29,499 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:29" (1/1) ... [2023-11-24 21:56:29,499 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:29" (1/1) ... [2023-11-24 21:56:29,507 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:29" (1/1) ... [2023-11-24 21:56:29,534 INFO L175 MemorySlicer]: Split 25 memory accesses to 6 slices as follows [2, 1, 1, 19, 1, 1]. 76 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 0, 1, 0, 0]. The 11 writes are split as follows [0, 1, 1, 7, 1, 1]. [2023-11-24 21:56:29,534 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:29" (1/1) ... [2023-11-24 21:56:29,534 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:29" (1/1) ... [2023-11-24 21:56:29,556 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:29" (1/1) ... [2023-11-24 21:56:29,573 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:29" (1/1) ... [2023-11-24 21:56:29,578 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:29" (1/1) ... [2023-11-24 21:56:29,586 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:29" (1/1) ... [2023-11-24 21:56:29,593 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:56:29,594 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:56:29,594 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:56:29,594 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:56:29,597 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:29" (1/1) ... [2023-11-24 21:56:29,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:56:29,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b180f138-114f-472a-bb26-bbbc320b8f5c/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:56:29,641 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b180f138-114f-472a-bb26-bbbc320b8f5c/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:56:29,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b180f138-114f-472a-bb26-bbbc320b8f5c/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:56:29,699 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:56:29,699 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:56:29,699 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:56:29,700 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:56:29,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 21:56:29,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-24 21:56:29,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:56:29,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:56:29,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:56:29,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:56:29,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 21:56:29,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-24 21:56:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 21:56:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:56:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:56:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:56:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-24 21:56:29,705 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-24 21:56:29,706 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-24 21:56:29,706 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-24 21:56:29,707 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-24 21:56:29,707 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-24 21:56:29,707 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-11-24 21:56:29,708 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-11-24 21:56:29,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:56:29,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:56:29,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:56:29,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:56:29,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 21:56:29,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-24 21:56:29,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 21:56:29,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:56:29,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:56:29,712 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 21:56:30,009 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:56:30,011 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:56:30,619 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:56:31,259 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:56:31,260 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-24 21:56:31,260 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:56:31 BoogieIcfgContainer [2023-11-24 21:56:31,261 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:56:31,268 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:56:31,268 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:56:31,272 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:56:31,273 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:56:28" (1/3) ... [2023-11-24 21:56:31,273 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a62f0b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:56:31, skipping insertion in model container [2023-11-24 21:56:31,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:29" (2/3) ... [2023-11-24 21:56:31,275 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a62f0b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:56:31, skipping insertion in model container [2023-11-24 21:56:31,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:56:31" (3/3) ... [2023-11-24 21:56:31,277 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_rmo.i [2023-11-24 21:56:31,298 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:56:31,298 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2023-11-24 21:56:31,299 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:56:31,422 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:56:31,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 98 transitions, 212 flow [2023-11-24 21:56:31,541 INFO L124 PetriNetUnfolderBase]: 2/94 cut-off events. [2023-11-24 21:56:31,542 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:56:31,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 2/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 295 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 95. Up to 2 conditions per place. [2023-11-24 21:56:31,551 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 98 transitions, 212 flow [2023-11-24 21:56:31,560 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 94 transitions, 200 flow [2023-11-24 21:56:31,580 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:56:31,589 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;@661687d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:56:31,589 INFO L358 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2023-11-24 21:56:31,594 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:56:31,595 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:56:31,595 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:56:31,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:56:31,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:56:31,596 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:56:31,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:31,604 INFO L85 PathProgramCache]: Analyzing trace with hash 24758, now seen corresponding path program 1 times [2023-11-24 21:56:31,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:31,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986231474] [2023-11-24 21:56:31,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:31,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:31,965 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 21:56:31,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:31,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986231474] [2023-11-24 21:56:31,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986231474] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:31,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:31,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:56:31,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099556392] [2023-11-24 21:56:31,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:31,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:31,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:32,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:32,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:32,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 98 [2023-11-24 21:56:32,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 94 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 21:56:32,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:56:32,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 98 [2023-11-24 21:56:32,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:56:39,038 INFO L124 PetriNetUnfolderBase]: 22245/32537 cut-off events. [2023-11-24 21:56:39,039 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2023-11-24 21:56:39,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62552 conditions, 32537 events. 22245/32537 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 2970. Compared 274859 event pairs, 19245 based on Foata normal form. 1000/19782 useless extension candidates. Maximal degree in co-relation 62537. Up to 25877 conditions per place. [2023-11-24 21:56:39,418 INFO L140 encePairwiseOnDemand]: 73/98 looper letters, 57 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-11-24 21:56:39,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 88 transitions, 306 flow [2023-11-24 21:56:39,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:39,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:56:39,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2023-11-24 21:56:39,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6836734693877551 [2023-11-24 21:56:39,438 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2023-11-24 21:56:39,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2023-11-24 21:56:39,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:56:39,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2023-11-24 21:56:39,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 21:56:39,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:39,460 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:39,462 INFO L175 Difference]: Start difference. First operand has 105 places, 94 transitions, 200 flow. Second operand 3 states and 201 transitions. [2023-11-24 21:56:39,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 88 transitions, 306 flow [2023-11-24 21:56:39,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 88 transitions, 302 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:56:39,480 INFO L231 Difference]: Finished difference. Result has 81 places, 70 transitions, 152 flow [2023-11-24 21:56:39,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=81, PETRI_TRANSITIONS=70} [2023-11-24 21:56:39,487 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -24 predicate places. [2023-11-24 21:56:39,487 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 70 transitions, 152 flow [2023-11-24 21:56:39,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 21:56:39,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:56:39,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:56:39,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:56:39,489 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:56:39,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:39,491 INFO L85 PathProgramCache]: Analyzing trace with hash 24759, now seen corresponding path program 1 times [2023-11-24 21:56:39,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:39,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569153433] [2023-11-24 21:56:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:39,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:39,671 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 21:56:39,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:39,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569153433] [2023-11-24 21:56:39,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569153433] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:39,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:39,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:56:39,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504248288] [2023-11-24 21:56:39,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:39,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:39,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:39,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:39,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:39,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 98 [2023-11-24 21:56:39,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 70 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 21:56:39,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:56:39,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 98 [2023-11-24 21:56:39,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:56:45,068 INFO L124 PetriNetUnfolderBase]: 22245/32536 cut-off events. [2023-11-24 21:56:45,068 INFO L125 PetriNetUnfolderBase]: For 500/500 co-relation queries the response was YES. [2023-11-24 21:56:45,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63048 conditions, 32536 events. 22245/32536 cut-off events. For 500/500 co-relation queries the response was YES. Maximal size of possible extension queue 2970. Compared 274693 event pairs, 19245 based on Foata normal form. 1/18782 useless extension candidates. Maximal degree in co-relation 63037. Up to 25876 conditions per place. [2023-11-24 21:56:45,391 INFO L140 encePairwiseOnDemand]: 95/98 looper letters, 56 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-11-24 21:56:45,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 87 transitions, 302 flow [2023-11-24 21:56:45,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:45,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:56:45,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2023-11-24 21:56:45,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2023-11-24 21:56:45,403 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2023-11-24 21:56:45,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2023-11-24 21:56:45,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:56:45,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2023-11-24 21:56:45,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 21:56:45,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:45,413 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:45,414 INFO L175 Difference]: Start difference. First operand has 81 places, 70 transitions, 152 flow. Second operand 3 states and 161 transitions. [2023-11-24 21:56:45,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 87 transitions, 302 flow [2023-11-24 21:56:45,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 87 transitions, 298 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:56:45,552 INFO L231 Difference]: Finished difference. Result has 80 places, 69 transitions, 150 flow [2023-11-24 21:56:45,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=80, PETRI_TRANSITIONS=69} [2023-11-24 21:56:45,553 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -25 predicate places. [2023-11-24 21:56:45,554 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 69 transitions, 150 flow [2023-11-24 21:56:45,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 21:56:45,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:56:45,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:56:45,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:56:45,555 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:56:45,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:45,565 INFO L85 PathProgramCache]: Analyzing trace with hash 738385260, now seen corresponding path program 1 times [2023-11-24 21:56:45,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:45,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355028709] [2023-11-24 21:56:45,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:45,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:45,700 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 21:56:45,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:45,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355028709] [2023-11-24 21:56:45,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355028709] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:45,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:45,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:56:45,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853980510] [2023-11-24 21:56:45,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:45,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:45,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:45,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:45,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:45,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 98 [2023-11-24 21:56:45,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 69 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 21:56:45,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:56:45,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 98 [2023-11-24 21:56:45,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:56:50,920 INFO L124 PetriNetUnfolderBase]: 22245/32531 cut-off events. [2023-11-24 21:56:50,921 INFO L125 PetriNetUnfolderBase]: For 500/500 co-relation queries the response was YES. [2023-11-24 21:56:51,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63043 conditions, 32531 events. 22245/32531 cut-off events. For 500/500 co-relation queries the response was YES. Maximal size of possible extension queue 2970. Compared 275801 event pairs, 14745 based on Foata normal form. 5/18788 useless extension candidates. Maximal degree in co-relation 63032. Up to 25870 conditions per place. [2023-11-24 21:56:51,196 INFO L140 encePairwiseOnDemand]: 95/98 looper letters, 56 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-11-24 21:56:51,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 86 transitions, 300 flow [2023-11-24 21:56:51,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:51,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:56:51,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2023-11-24 21:56:51,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2023-11-24 21:56:51,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2023-11-24 21:56:51,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2023-11-24 21:56:51,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:56:51,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2023-11-24 21:56:51,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 21:56:51,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:51,206 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:51,206 INFO L175 Difference]: Start difference. First operand has 80 places, 69 transitions, 150 flow. Second operand 3 states and 161 transitions. [2023-11-24 21:56:51,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 86 transitions, 300 flow [2023-11-24 21:56:51,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 86 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:56:51,318 INFO L231 Difference]: Finished difference. Result has 79 places, 68 transitions, 148 flow [2023-11-24 21:56:51,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=79, PETRI_TRANSITIONS=68} [2023-11-24 21:56:51,320 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -26 predicate places. [2023-11-24 21:56:51,321 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 68 transitions, 148 flow [2023-11-24 21:56:51,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 21:56:51,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:56:51,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:56:51,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:56:51,322 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:56:51,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:51,323 INFO L85 PathProgramCache]: Analyzing trace with hash 738385259, now seen corresponding path program 1 times [2023-11-24 21:56:51,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:51,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595211307] [2023-11-24 21:56:51,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:51,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:51,400 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 21:56:51,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:51,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595211307] [2023-11-24 21:56:51,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595211307] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:51,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:51,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:56:51,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568276535] [2023-11-24 21:56:51,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:51,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:51,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:51,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:51,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:51,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 98 [2023-11-24 21:56:51,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 68 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 21:56:51,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:56:51,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 98 [2023-11-24 21:56:51,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:56:56,266 INFO L124 PetriNetUnfolderBase]: 22249/32530 cut-off events. [2023-11-24 21:56:56,266 INFO L125 PetriNetUnfolderBase]: For 504/504 co-relation queries the response was YES. [2023-11-24 21:56:56,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63055 conditions, 32530 events. 22249/32530 cut-off events. For 504/504 co-relation queries the response was YES. Maximal size of possible extension queue 2970. Compared 276031 event pairs, 14745 based on Foata normal form. 0/18784 useless extension candidates. Maximal degree in co-relation 63045. Up to 25879 conditions per place. [2023-11-24 21:56:56,501 INFO L140 encePairwiseOnDemand]: 95/98 looper letters, 57 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-11-24 21:56:56,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 85 transitions, 300 flow [2023-11-24 21:56:56,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:56:56,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 159 transitions. [2023-11-24 21:56:56,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408163265306123 [2023-11-24 21:56:56,503 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 159 transitions. [2023-11-24 21:56:56,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 159 transitions. [2023-11-24 21:56:56,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:56:56,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 159 transitions. [2023-11-24 21:56:56,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 21:56:56,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:56,507 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:56,508 INFO L175 Difference]: Start difference. First operand has 79 places, 68 transitions, 148 flow. Second operand 3 states and 159 transitions. [2023-11-24 21:56:56,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 85 transitions, 300 flow [2023-11-24 21:56:56,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 85 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:56:56,533 INFO L231 Difference]: Finished difference. Result has 78 places, 67 transitions, 146 flow [2023-11-24 21:56:56,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=78, PETRI_TRANSITIONS=67} [2023-11-24 21:56:56,537 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -27 predicate places. [2023-11-24 21:56:56,537 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 67 transitions, 146 flow [2023-11-24 21:56:56,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 21:56:56,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:56:56,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:56:56,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:56:56,544 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:56:56,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:56,545 INFO L85 PathProgramCache]: Analyzing trace with hash 738386951, now seen corresponding path program 1 times [2023-11-24 21:56:56,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:56,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748025360] [2023-11-24 21:56:56,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:56,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:56,673 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 21:56:56,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:56,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748025360] [2023-11-24 21:56:56,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748025360] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:56,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:56,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:56:56,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326295812] [2023-11-24 21:56:56,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:56,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:56:56,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:56,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:56:56,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:56:56,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 98 [2023-11-24 21:56:56,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 67 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 21:56:56,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:56:56,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 98 [2023-11-24 21:56:56,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:56:58,898 INFO L124 PetriNetUnfolderBase]: 9695/14545 cut-off events. [2023-11-24 21:56:58,898 INFO L125 PetriNetUnfolderBase]: For 227/227 co-relation queries the response was YES. [2023-11-24 21:56:58,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28115 conditions, 14545 events. 9695/14545 cut-off events. For 227/227 co-relation queries the response was YES. Maximal size of possible extension queue 1270. Compared 116340 event pairs, 7395 based on Foata normal form. 0/9816 useless extension candidates. Maximal degree in co-relation 28104. Up to 9525 conditions per place. [2023-11-24 21:56:59,003 INFO L140 encePairwiseOnDemand]: 89/98 looper letters, 50 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-11-24 21:56:59,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 78 transitions, 272 flow [2023-11-24 21:56:59,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:59,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:56:59,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2023-11-24 21:56:59,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2023-11-24 21:56:59,006 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2023-11-24 21:56:59,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2023-11-24 21:56:59,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:56:59,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2023-11-24 21:56:59,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 21:56:59,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:59,009 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:59,009 INFO L175 Difference]: Start difference. First operand has 78 places, 67 transitions, 146 flow. Second operand 3 states and 161 transitions. [2023-11-24 21:56:59,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 78 transitions, 272 flow [2023-11-24 21:56:59,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 78 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:56:59,018 INFO L231 Difference]: Finished difference. Result has 77 places, 65 transitions, 154 flow [2023-11-24 21:56:59,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=77, PETRI_TRANSITIONS=65} [2023-11-24 21:56:59,019 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -28 predicate places. [2023-11-24 21:56:59,020 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 65 transitions, 154 flow [2023-11-24 21:56:59,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 21:56:59,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:56:59,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:56:59,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:56:59,021 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:56:59,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:59,021 INFO L85 PathProgramCache]: Analyzing trace with hash 738386952, now seen corresponding path program 1 times [2023-11-24 21:56:59,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:59,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945836301] [2023-11-24 21:56:59,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:59,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:59,193 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 21:56:59,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:59,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945836301] [2023-11-24 21:56:59,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945836301] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:59,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:59,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:56:59,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965832432] [2023-11-24 21:56:59,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:59,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:59,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:59,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:59,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:59,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 98 [2023-11-24 21:56:59,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 65 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 21:56:59,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:56:59,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 98 [2023-11-24 21:56:59,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:57:00,101 INFO L124 PetriNetUnfolderBase]: 2815/4478 cut-off events. [2023-11-24 21:57:00,101 INFO L125 PetriNetUnfolderBase]: For 216/216 co-relation queries the response was YES. [2023-11-24 21:57:00,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9065 conditions, 4478 events. 2815/4478 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 33192 event pairs, 2815 based on Foata normal form. 0/4201 useless extension candidates. Maximal degree in co-relation 9053. Up to 3966 conditions per place. [2023-11-24 21:57:00,126 INFO L140 encePairwiseOnDemand]: 90/98 looper letters, 30 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-11-24 21:57:00,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 58 transitions, 202 flow [2023-11-24 21:57:00,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:57:00,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:57:00,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 143 transitions. [2023-11-24 21:57:00,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2023-11-24 21:57:00,128 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 143 transitions. [2023-11-24 21:57:00,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 143 transitions. [2023-11-24 21:57:00,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:57:00,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 143 transitions. [2023-11-24 21:57:00,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 21:57:00,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:00,130 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:00,131 INFO L175 Difference]: Start difference. First operand has 77 places, 65 transitions, 154 flow. Second operand 3 states and 143 transitions. [2023-11-24 21:57:00,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 58 transitions, 202 flow [2023-11-24 21:57:00,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 58 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:57:00,134 INFO L231 Difference]: Finished difference. Result has 70 places, 58 transitions, 138 flow [2023-11-24 21:57:00,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=70, PETRI_TRANSITIONS=58} [2023-11-24 21:57:00,135 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -35 predicate places. [2023-11-24 21:57:00,135 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 58 transitions, 138 flow [2023-11-24 21:57:00,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 21:57:00,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:57:00,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:00,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:57:00,136 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:57:00,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:00,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1586424289, now seen corresponding path program 1 times [2023-11-24 21:57:00,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:00,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910897964] [2023-11-24 21:57:00,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:00,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:00,191 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 21:57:00,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:00,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910897964] [2023-11-24 21:57:00,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910897964] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:00,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:00,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:57:00,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403182392] [2023-11-24 21:57:00,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:00,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:57:00,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:00,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:57:00,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:57:00,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 98 [2023-11-24 21:57:00,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 58 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:00,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:57:00,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 98 [2023-11-24 21:57:00,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:57:00,991 INFO L124 PetriNetUnfolderBase]: 2822/4476 cut-off events. [2023-11-24 21:57:00,991 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2023-11-24 21:57:01,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9004 conditions, 4476 events. 2822/4476 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 33054 event pairs, 1715 based on Foata normal form. 0/4211 useless extension candidates. Maximal degree in co-relation 8997. Up to 2384 conditions per place. [2023-11-24 21:57:01,028 INFO L140 encePairwiseOnDemand]: 95/98 looper letters, 38 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-24 21:57:01,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 232 flow [2023-11-24 21:57:01,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:57:01,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:57:01,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2023-11-24 21:57:01,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-11-24 21:57:01,030 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 140 transitions. [2023-11-24 21:57:01,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 140 transitions. [2023-11-24 21:57:01,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:57:01,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 140 transitions. [2023-11-24 21:57:01,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 21:57:01,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:01,033 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:01,034 INFO L175 Difference]: Start difference. First operand has 70 places, 58 transitions, 138 flow. Second operand 3 states and 140 transitions. [2023-11-24 21:57:01,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 232 flow [2023-11-24 21:57:01,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 65 transitions, 231 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:57:01,036 INFO L231 Difference]: Finished difference. Result has 70 places, 57 transitions, 139 flow [2023-11-24 21:57:01,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=70, PETRI_TRANSITIONS=57} [2023-11-24 21:57:01,037 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -35 predicate places. [2023-11-24 21:57:01,038 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 57 transitions, 139 flow [2023-11-24 21:57:01,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:01,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:57:01,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:01,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:57:01,038 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:57:01,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:01,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1586424288, now seen corresponding path program 1 times [2023-11-24 21:57:01,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:01,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002623723] [2023-11-24 21:57:01,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:01,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:01,175 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 21:57:01,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:01,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002623723] [2023-11-24 21:57:01,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002623723] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:01,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:01,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:57:01,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048557857] [2023-11-24 21:57:01,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:01,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:57:01,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:01,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:57:01,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:57:01,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 98 [2023-11-24 21:57:01,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 57 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 21:57:01,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:57:01,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 98 [2023-11-24 21:57:01,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:57:02,151 INFO L124 PetriNetUnfolderBase]: 2815/4463 cut-off events. [2023-11-24 21:57:02,151 INFO L125 PetriNetUnfolderBase]: For 219/219 co-relation queries the response was YES. [2023-11-24 21:57:02,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9056 conditions, 4463 events. 2815/4463 cut-off events. For 219/219 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 32992 event pairs, 1712 based on Foata normal form. 6/4207 useless extension candidates. Maximal degree in co-relation 9049. Up to 2371 conditions per place. [2023-11-24 21:57:02,183 INFO L140 encePairwiseOnDemand]: 95/98 looper letters, 37 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-11-24 21:57:02,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 64 transitions, 231 flow [2023-11-24 21:57:02,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:57:02,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:57:02,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 142 transitions. [2023-11-24 21:57:02,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2023-11-24 21:57:02,185 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 142 transitions. [2023-11-24 21:57:02,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 142 transitions. [2023-11-24 21:57:02,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:57:02,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 142 transitions. [2023-11-24 21:57:02,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states 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 21:57:02,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:02,188 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:02,188 INFO L175 Difference]: Start difference. First operand has 70 places, 57 transitions, 139 flow. Second operand 3 states and 142 transitions. [2023-11-24 21:57:02,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 64 transitions, 231 flow [2023-11-24 21:57:02,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 64 transitions, 227 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:57:02,192 INFO L231 Difference]: Finished difference. Result has 69 places, 56 transitions, 137 flow [2023-11-24 21:57:02,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=69, PETRI_TRANSITIONS=56} [2023-11-24 21:57:02,193 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -36 predicate places. [2023-11-24 21:57:02,193 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 56 transitions, 137 flow [2023-11-24 21:57:02,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 21:57:02,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:57:02,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:02,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:57:02,194 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:57:02,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:02,195 INFO L85 PathProgramCache]: Analyzing trace with hash 654954769, now seen corresponding path program 1 times [2023-11-24 21:57:02,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:02,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596025859] [2023-11-24 21:57:02,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:02,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:02,299 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 21:57:02,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:02,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596025859] [2023-11-24 21:57:02,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596025859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:02,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:02,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:57:02,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915031246] [2023-11-24 21:57:02,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:02,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:57:02,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:02,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:57:02,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:57:02,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 98 [2023-11-24 21:57:02,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 56 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 21:57:02,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:57:02,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 98 [2023-11-24 21:57:02,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:57:03,169 INFO L124 PetriNetUnfolderBase]: 2815/4448 cut-off events. [2023-11-24 21:57:03,169 INFO L125 PetriNetUnfolderBase]: For 219/219 co-relation queries the response was YES. [2023-11-24 21:57:03,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9041 conditions, 4448 events. 2815/4448 cut-off events. For 219/219 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 32489 event pairs, 1402 based on Foata normal form. 18/4231 useless extension candidates. Maximal degree in co-relation 9034. Up to 2319 conditions per place. [2023-11-24 21:57:03,195 INFO L140 encePairwiseOnDemand]: 95/98 looper letters, 37 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-11-24 21:57:03,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 63 transitions, 229 flow [2023-11-24 21:57:03,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:57:03,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:57:03,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 142 transitions. [2023-11-24 21:57:03,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2023-11-24 21:57:03,197 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 142 transitions. [2023-11-24 21:57:03,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 142 transitions. [2023-11-24 21:57:03,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:57:03,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 142 transitions. [2023-11-24 21:57:03,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states 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 21:57:03,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:03,198 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:03,198 INFO L175 Difference]: Start difference. First operand has 69 places, 56 transitions, 137 flow. Second operand 3 states and 142 transitions. [2023-11-24 21:57:03,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 63 transitions, 229 flow [2023-11-24 21:57:03,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 63 transitions, 225 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:57:03,201 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 135 flow [2023-11-24 21:57:03,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2023-11-24 21:57:03,202 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -37 predicate places. [2023-11-24 21:57:03,202 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 135 flow [2023-11-24 21:57:03,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 21:57:03,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:57:03,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:03,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:57:03,203 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:57:03,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:03,203 INFO L85 PathProgramCache]: Analyzing trace with hash 654954768, now seen corresponding path program 1 times [2023-11-24 21:57:03,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:03,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365774537] [2023-11-24 21:57:03,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:03,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:03,266 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 21:57:03,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:03,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365774537] [2023-11-24 21:57:03,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365774537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:03,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:03,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:57:03,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102603355] [2023-11-24 21:57:03,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:03,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:57:03,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:03,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:57:03,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:57:03,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 98 [2023-11-24 21:57:03,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 21:57:03,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:57:03,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 98 [2023-11-24 21:57:03,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:57:03,959 INFO L124 PetriNetUnfolderBase]: 2848/4451 cut-off events. [2023-11-24 21:57:03,959 INFO L125 PetriNetUnfolderBase]: For 248/248 co-relation queries the response was YES. [2023-11-24 21:57:03,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9107 conditions, 4451 events. 2848/4451 cut-off events. For 248/248 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 32110 event pairs, 1710 based on Foata normal form. 0/4222 useless extension candidates. Maximal degree in co-relation 9100. Up to 2370 conditions per place. [2023-11-24 21:57:03,987 INFO L140 encePairwiseOnDemand]: 95/98 looper letters, 38 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-11-24 21:57:03,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 62 transitions, 229 flow [2023-11-24 21:57:03,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:57:03,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:57:03,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2023-11-24 21:57:03,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-11-24 21:57:03,989 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 140 transitions. [2023-11-24 21:57:03,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 140 transitions. [2023-11-24 21:57:03,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:57:03,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 140 transitions. [2023-11-24 21:57:03,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 21:57:03,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:03,991 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:03,991 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 135 flow. Second operand 3 states and 140 transitions. [2023-11-24 21:57:03,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 62 transitions, 229 flow [2023-11-24 21:57:03,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 62 transitions, 225 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:57:03,994 INFO L231 Difference]: Finished difference. Result has 67 places, 54 transitions, 133 flow [2023-11-24 21:57:03,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=67, PETRI_TRANSITIONS=54} [2023-11-24 21:57:03,995 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -38 predicate places. [2023-11-24 21:57:03,995 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 54 transitions, 133 flow [2023-11-24 21:57:03,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 21:57:03,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:57:03,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:03,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:57:03,996 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:57:03,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:03,997 INFO L85 PathProgramCache]: Analyzing trace with hash -346563229, now seen corresponding path program 1 times [2023-11-24 21:57:03,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:03,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569645835] [2023-11-24 21:57:03,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:03,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:04,142 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 21:57:04,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:04,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569645835] [2023-11-24 21:57:04,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569645835] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:04,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:04,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:57:04,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963793821] [2023-11-24 21:57:04,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:04,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:57:04,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:04,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:57:04,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:57:04,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 98 [2023-11-24 21:57:04,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 54 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 21:57:04,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:57:04,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 98 [2023-11-24 21:57:04,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:57:04,821 INFO L124 PetriNetUnfolderBase]: 2675/4469 cut-off events. [2023-11-24 21:57:04,822 INFO L125 PetriNetUnfolderBase]: For 300/300 co-relation queries the response was YES. [2023-11-24 21:57:04,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8886 conditions, 4469 events. 2675/4469 cut-off events. For 300/300 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 32195 event pairs, 1383 based on Foata normal form. 0/4261 useless extension candidates. Maximal degree in co-relation 8879. Up to 2557 conditions per place. [2023-11-24 21:57:04,854 INFO L140 encePairwiseOnDemand]: 94/98 looper letters, 53 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-11-24 21:57:04,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 78 transitions, 310 flow [2023-11-24 21:57:04,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:57:04,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:57:04,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-11-24 21:57:04,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2023-11-24 21:57:04,856 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-11-24 21:57:04,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-11-24 21:57:04,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:57:04,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-11-24 21:57:04,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states 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 21:57:04,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:04,858 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:04,859 INFO L175 Difference]: Start difference. First operand has 67 places, 54 transitions, 133 flow. Second operand 3 states and 162 transitions. [2023-11-24 21:57:04,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 78 transitions, 310 flow [2023-11-24 21:57:04,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 78 transitions, 302 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:57:04,862 INFO L231 Difference]: Finished difference. Result has 68 places, 54 transitions, 139 flow [2023-11-24 21:57:04,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=68, PETRI_TRANSITIONS=54} [2023-11-24 21:57:04,863 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -37 predicate places. [2023-11-24 21:57:04,863 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 54 transitions, 139 flow [2023-11-24 21:57:04,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 21:57:04,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:57:04,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:04,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:57:04,864 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:57:04,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:04,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1960235126, now seen corresponding path program 1 times [2023-11-24 21:57:04,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:04,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685369302] [2023-11-24 21:57:04,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:04,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:04,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:05,031 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 21:57:05,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:05,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685369302] [2023-11-24 21:57:05,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685369302] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:05,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:05,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:57:05,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154605036] [2023-11-24 21:57:05,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:05,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:57:05,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:05,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:57:05,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:57:05,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 98 [2023-11-24 21:57:05,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 54 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 21:57:05,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:57:05,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 98 [2023-11-24 21:57:05,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:57:05,970 INFO L124 PetriNetUnfolderBase]: 3359/6247 cut-off events. [2023-11-24 21:57:05,970 INFO L125 PetriNetUnfolderBase]: For 826/826 co-relation queries the response was YES. [2023-11-24 21:57:05,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12560 conditions, 6247 events. 3359/6247 cut-off events. For 826/826 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 55389 event pairs, 859 based on Foata normal form. 344/6495 useless extension candidates. Maximal degree in co-relation 12551. Up to 2272 conditions per place. [2023-11-24 21:57:06,007 INFO L140 encePairwiseOnDemand]: 86/98 looper letters, 52 selfloop transitions, 8 changer transitions 0/83 dead transitions. [2023-11-24 21:57:06,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 325 flow [2023-11-24 21:57:06,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:57:06,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:57:06,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 210 transitions. [2023-11-24 21:57:06,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2023-11-24 21:57:06,010 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 210 transitions. [2023-11-24 21:57:06,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 210 transitions. [2023-11-24 21:57:06,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:57:06,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 210 transitions. [2023-11-24 21:57:06,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states 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 21:57:06,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 98.0) internal successors, (490), 5 states have internal predecessors, (490), 0 states have call successors, (0), 0 states 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 21:57:06,013 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 98.0) internal successors, (490), 5 states have internal predecessors, (490), 0 states have call successors, (0), 0 states 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 21:57:06,013 INFO L175 Difference]: Start difference. First operand has 68 places, 54 transitions, 139 flow. Second operand 4 states and 210 transitions. [2023-11-24 21:57:06,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 325 flow [2023-11-24 21:57:06,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 83 transitions, 319 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:57:06,016 INFO L231 Difference]: Finished difference. Result has 71 places, 58 transitions, 199 flow [2023-11-24 21:57:06,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=71, PETRI_TRANSITIONS=58} [2023-11-24 21:57:06,017 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -34 predicate places. [2023-11-24 21:57:06,017 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 58 transitions, 199 flow [2023-11-24 21:57:06,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 21:57:06,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:57:06,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:06,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:57:06,018 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:57:06,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:06,019 INFO L85 PathProgramCache]: Analyzing trace with hash -457472403, now seen corresponding path program 1 times [2023-11-24 21:57:06,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:06,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390622032] [2023-11-24 21:57:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:06,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:06,314 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 21:57:06,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:06,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390622032] [2023-11-24 21:57:06,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390622032] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:06,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:06,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:57:06,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796059862] [2023-11-24 21:57:06,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:06,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:57:06,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:06,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:57:06,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:57:06,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 98 [2023-11-24 21:57:06,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 58 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 37.6) internal successors, (188), 5 states have internal predecessors, (188), 0 states have call successors, (0), 0 states 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 21:57:06,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:57:06,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 98 [2023-11-24 21:57:06,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:57:07,439 INFO L124 PetriNetUnfolderBase]: 3243/6051 cut-off events. [2023-11-24 21:57:07,439 INFO L125 PetriNetUnfolderBase]: For 2958/2958 co-relation queries the response was YES. [2023-11-24 21:57:07,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14573 conditions, 6051 events. 3243/6051 cut-off events. For 2958/2958 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 53782 event pairs, 1259 based on Foata normal form. 48/5987 useless extension candidates. Maximal degree in co-relation 14561. Up to 3252 conditions per place. [2023-11-24 21:57:07,488 INFO L140 encePairwiseOnDemand]: 95/98 looper letters, 57 selfloop transitions, 3 changer transitions 0/83 dead transitions. [2023-11-24 21:57:07,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 83 transitions, 415 flow [2023-11-24 21:57:07,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:57:07,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:57:07,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 194 transitions. [2023-11-24 21:57:07,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49489795918367346 [2023-11-24 21:57:07,490 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 194 transitions. [2023-11-24 21:57:07,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 194 transitions. [2023-11-24 21:57:07,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:57:07,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 194 transitions. [2023-11-24 21:57:07,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 0 states 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 21:57:07,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 98.0) internal successors, (490), 5 states have internal predecessors, (490), 0 states have call successors, (0), 0 states 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 21:57:07,492 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 98.0) internal successors, (490), 5 states have internal predecessors, (490), 0 states have call successors, (0), 0 states 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 21:57:07,493 INFO L175 Difference]: Start difference. First operand has 71 places, 58 transitions, 199 flow. Second operand 4 states and 194 transitions. [2023-11-24 21:57:07,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 83 transitions, 415 flow [2023-11-24 21:57:07,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 83 transitions, 412 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:57:07,504 INFO L231 Difference]: Finished difference. Result has 72 places, 57 transitions, 198 flow [2023-11-24 21:57:07,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=72, PETRI_TRANSITIONS=57} [2023-11-24 21:57:07,505 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -33 predicate places. [2023-11-24 21:57:07,505 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 198 flow [2023-11-24 21:57:07,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.6) internal successors, (188), 5 states have internal predecessors, (188), 0 states have call successors, (0), 0 states 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 21:57:07,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:57:07,506 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] [2023-11-24 21:57:07,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:57:07,506 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:57:07,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:07,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1725429782, now seen corresponding path program 1 times [2023-11-24 21:57:07,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:07,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790319833] [2023-11-24 21:57:07,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:07,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:08,609 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 21:57:08,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:08,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790319833] [2023-11-24 21:57:08,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790319833] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:08,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:08,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 21:57:08,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105942977] [2023-11-24 21:57:08,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:08,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:57:08,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:08,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:57:08,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:57:08,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 98 [2023-11-24 21:57:08,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 57 transitions, 198 flow. Second operand has 10 states, 10 states have (on average 30.7) internal successors, (307), 10 states have internal predecessors, (307), 0 states have call successors, (0), 0 states 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 21:57:08,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:57:08,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 98 [2023-11-24 21:57:08,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:57:10,949 INFO L124 PetriNetUnfolderBase]: 4986/8654 cut-off events. [2023-11-24 21:57:10,949 INFO L125 PetriNetUnfolderBase]: For 4858/4858 co-relation queries the response was YES. [2023-11-24 21:57:10,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20885 conditions, 8654 events. 4986/8654 cut-off events. For 4858/4858 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 76929 event pairs, 1740 based on Foata normal form. 0/8292 useless extension candidates. Maximal degree in co-relation 20872. Up to 3112 conditions per place. [2023-11-24 21:57:11,027 INFO L140 encePairwiseOnDemand]: 90/98 looper letters, 83 selfloop transitions, 11 changer transitions 0/114 dead transitions. [2023-11-24 21:57:11,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 114 transitions, 593 flow [2023-11-24 21:57:11,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:57:11,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-24 21:57:11,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 320 transitions. [2023-11-24 21:57:11,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2023-11-24 21:57:11,029 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 320 transitions. [2023-11-24 21:57:11,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 320 transitions. [2023-11-24 21:57:11,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:57:11,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 320 transitions. [2023-11-24 21:57:11,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 40.0) internal successors, (320), 8 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 21:57:11,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 98.0) internal successors, (882), 9 states have internal predecessors, (882), 0 states have call successors, (0), 0 states 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 21:57:11,033 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 98.0) internal successors, (882), 9 states have internal predecessors, (882), 0 states have call successors, (0), 0 states 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 21:57:11,033 INFO L175 Difference]: Start difference. First operand has 72 places, 57 transitions, 198 flow. Second operand 8 states and 320 transitions. [2023-11-24 21:57:11,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 114 transitions, 593 flow [2023-11-24 21:57:11,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 114 transitions, 585 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:57:11,045 INFO L231 Difference]: Finished difference. Result has 83 places, 66 transitions, 292 flow [2023-11-24 21:57:11,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=292, PETRI_PLACES=83, PETRI_TRANSITIONS=66} [2023-11-24 21:57:11,046 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -22 predicate places. [2023-11-24 21:57:11,046 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 66 transitions, 292 flow [2023-11-24 21:57:11,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.7) internal successors, (307), 10 states have internal predecessors, (307), 0 states have call successors, (0), 0 states 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 21:57:11,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:57:11,047 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] [2023-11-24 21:57:11,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:57:11,047 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:57:11,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:11,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1725428689, now seen corresponding path program 1 times [2023-11-24 21:57:11,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:11,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902086927] [2023-11-24 21:57:11,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:11,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:11,269 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 21:57:11,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:11,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902086927] [2023-11-24 21:57:11,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902086927] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:11,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:11,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:57:11,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086927381] [2023-11-24 21:57:11,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:11,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:57:11,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:11,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:57:11,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:57:11,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 98 [2023-11-24 21:57:11,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 66 transitions, 292 flow. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 5 states have internal predecessors, (179), 0 states have call successors, (0), 0 states 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 21:57:11,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:57:11,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 98 [2023-11-24 21:57:11,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:57:14,343 INFO L124 PetriNetUnfolderBase]: 9491/15815 cut-off events. [2023-11-24 21:57:14,344 INFO L125 PetriNetUnfolderBase]: For 13095/13441 co-relation queries the response was YES. [2023-11-24 21:57:14,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41996 conditions, 15815 events. 9491/15815 cut-off events. For 13095/13441 co-relation queries the response was YES. Maximal size of possible extension queue 1632. Compared 144725 event pairs, 1731 based on Foata normal form. 0/15395 useless extension candidates. Maximal degree in co-relation 41977. Up to 6757 conditions per place. [2023-11-24 21:57:14,491 INFO L140 encePairwiseOnDemand]: 91/98 looper letters, 111 selfloop transitions, 17 changer transitions 1/150 dead transitions. [2023-11-24 21:57:14,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 150 transitions, 966 flow [2023-11-24 21:57:14,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:57:14,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-24 21:57:14,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 364 transitions. [2023-11-24 21:57:14,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2023-11-24 21:57:14,493 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 364 transitions. [2023-11-24 21:57:14,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 364 transitions. [2023-11-24 21:57:14,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:57:14,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 364 transitions. [2023-11-24 21:57:14,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 45.5) internal successors, (364), 8 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 21:57:14,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 98.0) internal successors, (882), 9 states have internal predecessors, (882), 0 states have call successors, (0), 0 states 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 21:57:14,498 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 98.0) internal successors, (882), 9 states have internal predecessors, (882), 0 states have call successors, (0), 0 states 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 21:57:14,498 INFO L175 Difference]: Start difference. First operand has 83 places, 66 transitions, 292 flow. Second operand 8 states and 364 transitions. [2023-11-24 21:57:14,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 150 transitions, 966 flow [2023-11-24 21:57:14,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 150 transitions, 966 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:57:14,547 INFO L231 Difference]: Finished difference. Result has 94 places, 78 transitions, 427 flow [2023-11-24 21:57:14,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=427, PETRI_PLACES=94, PETRI_TRANSITIONS=78} [2023-11-24 21:57:14,548 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -11 predicate places. [2023-11-24 21:57:14,548 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 78 transitions, 427 flow [2023-11-24 21:57:14,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 5 states have internal predecessors, (179), 0 states have call successors, (0), 0 states 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 21:57:14,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:57:14,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:14,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:57:14,549 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-24 21:57:14,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:14,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1948713492, now seen corresponding path program 1 times [2023-11-24 21:57:14,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:14,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327550559] [2023-11-24 21:57:14,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:14,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:14,782 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 21:57:14,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:14,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327550559] [2023-11-24 21:57:14,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327550559] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:14,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:14,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:57:14,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270007937] [2023-11-24 21:57:14,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:14,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:57:14,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:14,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:57:14,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:57:14,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 98 [2023-11-24 21:57:14,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 78 transitions, 427 flow. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 21:57:14,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:57:14,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 98 [2023-11-24 21:57:14,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand