./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/04_incdec_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 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_ebb3e957-1714-4da5-a304-1c35485446d5/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb3e957-1714-4da5-a304-1c35485446d5/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb3e957-1714-4da5-a304-1c35485446d5/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb3e957-1714-4da5-a304-1c35485446d5/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/04_incdec_cas.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb3e957-1714-4da5-a304-1c35485446d5/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb3e957-1714-4da5-a304-1c35485446d5/bin/uautomizer-verify-bycVGegfSx --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 a9295efc0d8bacfc5fb202511f0d3721ae5554ffb4def47cf5dbf45088356869 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:26:32,652 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:26:32,741 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb3e957-1714-4da5-a304-1c35485446d5/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 22:26:32,747 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:26:32,747 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:26:32,780 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:26:32,781 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:26:32,781 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:26:32,782 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:26:32,783 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:26:32,784 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:26:32,784 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:26:32,785 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:26:32,786 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:26:32,786 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:26:32,787 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:26:32,787 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:26:32,788 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:26:32,796 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:26:32,797 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:26:32,798 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:26:32,799 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:26:32,799 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:26:32,800 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:26:32,800 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:26:32,801 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:26:32,801 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:26:32,802 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:26:32,803 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:26:32,803 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:26:32,804 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:26:32,804 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:26:32,804 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:26:32,805 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:26:32,805 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:26:32,806 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:26:32,806 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:26:32,806 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:26:32,806 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:26:32,807 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_ebb3e957-1714-4da5-a304-1c35485446d5/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb3e957-1714-4da5-a304-1c35485446d5/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9295efc0d8bacfc5fb202511f0d3721ae5554ffb4def47cf5dbf45088356869 [2023-11-21 22:26:33,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:26:33,131 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:26:33,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:26:33,135 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:26:33,135 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:26:33,137 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb3e957-1714-4da5-a304-1c35485446d5/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/pthread-ext/04_incdec_cas.i [2023-11-21 22:26:36,350 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:26:36,651 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:26:36,652 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb3e957-1714-4da5-a304-1c35485446d5/sv-benchmarks/c/pthread-ext/04_incdec_cas.i [2023-11-21 22:26:36,669 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb3e957-1714-4da5-a304-1c35485446d5/bin/uautomizer-verify-bycVGegfSx/data/e625ae2f5/01b4e26ef58c4566a5cb0974a0207839/FLAG3da5094e1 [2023-11-21 22:26:36,685 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb3e957-1714-4da5-a304-1c35485446d5/bin/uautomizer-verify-bycVGegfSx/data/e625ae2f5/01b4e26ef58c4566a5cb0974a0207839 [2023-11-21 22:26:36,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:26:36,690 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:26:36,691 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:26:36,692 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:26:36,698 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:26:36,698 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:26:36" (1/1) ... [2023-11-21 22:26:36,699 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6451ef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:36, skipping insertion in model container [2023-11-21 22:26:36,699 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:26:36" (1/1) ... [2023-11-21 22:26:36,761 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:26:37,199 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:26:37,214 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:26:37,290 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:26:37,331 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:26:37,332 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:26:37,340 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:26:37,340 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:37 WrapperNode [2023-11-21 22:26:37,341 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:26:37,342 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:26:37,342 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:26:37,343 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:26:37,352 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:37" (1/1) ... [2023-11-21 22:26:37,383 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:37" (1/1) ... [2023-11-21 22:26:37,418 INFO L138 Inliner]: procedures = 174, calls = 49, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 168 [2023-11-21 22:26:37,419 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:26:37,419 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:26:37,419 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:26:37,420 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:26:37,429 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:37" (1/1) ... [2023-11-21 22:26:37,429 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:37" (1/1) ... [2023-11-21 22:26:37,433 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:37" (1/1) ... [2023-11-21 22:26:37,433 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:37" (1/1) ... [2023-11-21 22:26:37,445 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:37" (1/1) ... [2023-11-21 22:26:37,451 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:37" (1/1) ... [2023-11-21 22:26:37,458 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:37" (1/1) ... [2023-11-21 22:26:37,460 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:37" (1/1) ... [2023-11-21 22:26:37,468 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:26:37,474 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:26:37,474 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:26:37,475 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:26:37,476 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:37" (1/1) ... [2023-11-21 22:26:37,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:26:37,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb3e957-1714-4da5-a304-1c35485446d5/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:26:37,511 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb3e957-1714-4da5-a304-1c35485446d5/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:26:37,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebb3e957-1714-4da5-a304-1c35485446d5/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:26:37,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 22:26:37,543 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-21 22:26:37,544 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-21 22:26:37,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 22:26:37,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-21 22:26:37,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:26:37,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:26:37,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:26:37,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 22:26:37,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-21 22:26:37,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:26:37,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:26:37,547 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 22:26:37,679 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:26:37,681 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:26:38,203 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:26:38,750 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:26:38,750 INFO L308 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-21 22:26:38,752 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:26:38 BoogieIcfgContainer [2023-11-21 22:26:38,752 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:26:38,756 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:26:38,756 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:26:38,760 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:26:38,760 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:26:36" (1/3) ... [2023-11-21 22:26:38,761 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@278b6363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:26:38, skipping insertion in model container [2023-11-21 22:26:38,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:37" (2/3) ... [2023-11-21 22:26:38,762 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@278b6363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:26:38, skipping insertion in model container [2023-11-21 22:26:38,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:26:38" (3/3) ... [2023-11-21 22:26:38,763 INFO L112 eAbstractionObserver]: Analyzing ICFG 04_incdec_cas.i [2023-11-21 22:26:38,788 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:26:38,789 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2023-11-21 22:26:38,790 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 22:26:38,949 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 22:26:39,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 76 transitions, 156 flow [2023-11-21 22:26:39,084 INFO L124 PetriNetUnfolderBase]: 8/83 cut-off events. [2023-11-21 22:26:39,085 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:26:39,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 83 events. 8/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 436 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 73. Up to 2 conditions per place. [2023-11-21 22:26:39,091 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 76 transitions, 156 flow [2023-11-21 22:26:39,097 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 76 transitions, 156 flow [2023-11-21 22:26:39,115 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:26:39,124 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;@562d57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:26:39,124 INFO L358 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2023-11-21 22:26:39,128 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:26:39,128 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-21 22:26:39,129 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:26:39,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:26:39,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:26:39,130 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-21 22:26:39,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:39,137 INFO L85 PathProgramCache]: Analyzing trace with hash 574341, now seen corresponding path program 1 times [2023-11-21 22:26:39,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:39,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876872186] [2023-11-21 22:26:39,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:39,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:39,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:39,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876872186] [2023-11-21 22:26:39,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876872186] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:39,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:39,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:26:39,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188371400] [2023-11-21 22:26:39,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:39,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:26:39,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:39,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:26:39,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:26:39,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 76 [2023-11-21 22:26:39,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 76 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:39,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:26:39,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 76 [2023-11-21 22:26:39,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:26:39,778 INFO L124 PetriNetUnfolderBase]: 167/401 cut-off events. [2023-11-21 22:26:39,778 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:26:39,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 401 events. 167/401 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2107 event pairs, 131 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 757. Up to 327 conditions per place. [2023-11-21 22:26:39,785 INFO L140 encePairwiseOnDemand]: 62/76 looper letters, 59 selfloop transitions, 6 changer transitions 0/73 dead transitions. [2023-11-21 22:26:39,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 73 transitions, 280 flow [2023-11-21 22:26:39,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:26:39,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:26:39,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2023-11-21 22:26:39,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44298245614035087 [2023-11-21 22:26:39,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 101 transitions. [2023-11-21 22:26:39,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 101 transitions. [2023-11-21 22:26:39,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:26:39,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 101 transitions. [2023-11-21 22:26:39,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-11-21 22:26:39,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:39,811 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:39,813 INFO L175 Difference]: Start difference. First operand has 71 places, 76 transitions, 156 flow. Second operand 3 states and 101 transitions. [2023-11-21 22:26:39,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 73 transitions, 280 flow [2023-11-21 22:26:39,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 73 transitions, 280 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-21 22:26:39,821 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 168 flow [2023-11-21 22:26:39,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2023-11-21 22:26:39,827 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2023-11-21 22:26:39,828 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 168 flow [2023-11-21 22:26:39,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:39,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:26:39,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:26:39,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:26:39,829 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-21 22:26:39,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:39,830 INFO L85 PathProgramCache]: Analyzing trace with hash 574342, now seen corresponding path program 1 times [2023-11-21 22:26:39,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:39,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059992627] [2023-11-21 22:26:39,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:39,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:39,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:39,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:39,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059992627] [2023-11-21 22:26:39,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059992627] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:39,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:39,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:26:39,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388493565] [2023-11-21 22:26:39,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:39,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:26:39,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:39,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:26:39,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:26:39,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 76 [2023-11-21 22:26:39,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:39,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:26:39,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 76 [2023-11-21 22:26:39,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:26:40,143 INFO L124 PetriNetUnfolderBase]: 115/292 cut-off events. [2023-11-21 22:26:40,143 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-21 22:26:40,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 292 events. 115/292 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 1471 event pairs, 94 based on Foata normal form. 49/223 useless extension candidates. Maximal degree in co-relation 586. Up to 265 conditions per place. [2023-11-21 22:26:40,147 INFO L140 encePairwiseOnDemand]: 74/76 looper letters, 56 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2023-11-21 22:26:40,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 67 transitions, 280 flow [2023-11-21 22:26:40,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:26:40,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:26:40,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-21 22:26:40,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38596491228070173 [2023-11-21 22:26:40,150 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-21 22:26:40,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-21 22:26:40,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:26:40,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-21 22:26:40,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:40,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:40,153 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:40,154 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 168 flow. Second operand 3 states and 88 transitions. [2023-11-21 22:26:40,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 67 transitions, 280 flow [2023-11-21 22:26:40,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:26:40,158 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 156 flow [2023-11-21 22:26:40,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2023-11-21 22:26:40,160 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -4 predicate places. [2023-11-21 22:26:40,160 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 156 flow [2023-11-21 22:26:40,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:40,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:26:40,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:40,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:26:40,161 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-21 22:26:40,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:40,162 INFO L85 PathProgramCache]: Analyzing trace with hash -2140487707, now seen corresponding path program 1 times [2023-11-21 22:26:40,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:40,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938583706] [2023-11-21 22:26:40,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:40,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:40,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:40,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938583706] [2023-11-21 22:26:40,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938583706] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:40,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:40,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:26:40,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877229107] [2023-11-21 22:26:40,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:40,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:26:40,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:40,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:26:40,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:26:40,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 76 [2023-11-21 22:26:40,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:40,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:26:40,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 76 [2023-11-21 22:26:40,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:26:40,571 INFO L124 PetriNetUnfolderBase]: 106/267 cut-off events. [2023-11-21 22:26:40,572 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-21 22:26:40,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 267 events. 106/267 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 1289 event pairs, 76 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 533. Up to 199 conditions per place. [2023-11-21 22:26:40,578 INFO L140 encePairwiseOnDemand]: 65/76 looper letters, 49 selfloop transitions, 5 changer transitions 0/63 dead transitions. [2023-11-21 22:26:40,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 63 transitions, 256 flow [2023-11-21 22:26:40,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:26:40,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:26:40,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2023-11-21 22:26:40,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39473684210526316 [2023-11-21 22:26:40,580 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 90 transitions. [2023-11-21 22:26:40,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 90 transitions. [2023-11-21 22:26:40,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:26:40,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 90 transitions. [2023-11-21 22:26:40,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:40,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:40,584 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:40,584 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 156 flow. Second operand 3 states and 90 transitions. [2023-11-21 22:26:40,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 63 transitions, 256 flow [2023-11-21 22:26:40,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 63 transitions, 255 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:26:40,588 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 153 flow [2023-11-21 22:26:40,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2023-11-21 22:26:40,589 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -9 predicate places. [2023-11-21 22:26:40,589 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 153 flow [2023-11-21 22:26:40,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:40,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:26:40,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:40,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:26:40,591 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-21 22:26:40,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:40,591 INFO L85 PathProgramCache]: Analyzing trace with hash -2140487706, now seen corresponding path program 1 times [2023-11-21 22:26:40,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:40,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100504176] [2023-11-21 22:26:40,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:40,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:40,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:40,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:40,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100504176] [2023-11-21 22:26:40,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100504176] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:40,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:40,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:26:40,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132105237] [2023-11-21 22:26:40,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:40,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:26:40,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:40,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:26:40,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:26:40,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 76 [2023-11-21 22:26:40,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 153 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:40,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:26:40,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 76 [2023-11-21 22:26:40,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:26:41,010 INFO L124 PetriNetUnfolderBase]: 91/232 cut-off events. [2023-11-21 22:26:41,010 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-21 22:26:41,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 485 conditions, 232 events. 91/232 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1087 event pairs, 70 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 475. Up to 205 conditions per place. [2023-11-21 22:26:41,013 INFO L140 encePairwiseOnDemand]: 69/76 looper letters, 44 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-11-21 22:26:41,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 55 transitions, 231 flow [2023-11-21 22:26:41,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:26:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:26:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2023-11-21 22:26:41,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3684210526315789 [2023-11-21 22:26:41,016 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 84 transitions. [2023-11-21 22:26:41,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 84 transitions. [2023-11-21 22:26:41,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:26:41,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 84 transitions. [2023-11-21 22:26:41,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:41,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:41,020 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:41,020 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 153 flow. Second operand 3 states and 84 transitions. [2023-11-21 22:26:41,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 55 transitions, 231 flow [2023-11-21 22:26:41,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 55 transitions, 221 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:26:41,025 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 133 flow [2023-11-21 22:26:41,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2023-11-21 22:26:41,027 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -15 predicate places. [2023-11-21 22:26:41,028 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 133 flow [2023-11-21 22:26:41,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:41,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:26:41,028 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-21 22:26:41,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:26:41,029 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-21 22:26:41,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:41,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1931184793, now seen corresponding path program 1 times [2023-11-21 22:26:41,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:41,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177534007] [2023-11-21 22:26:41,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:41,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 22:26:41,052 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 22:26:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 22:26:41,083 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-21 22:26:41,083 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 22:26:41,084 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (79 of 80 remaining) [2023-11-21 22:26:41,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 80 remaining) [2023-11-21 22:26:41,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 80 remaining) [2023-11-21 22:26:41,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 80 remaining) [2023-11-21 22:26:41,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 80 remaining) [2023-11-21 22:26:41,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 80 remaining) [2023-11-21 22:26:41,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 80 remaining) [2023-11-21 22:26:41,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 80 remaining) [2023-11-21 22:26:41,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 80 remaining) [2023-11-21 22:26:41,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37ASSERT_VIOLATIONMEMORY_LEAK (70 of 80 remaining) [2023-11-21 22:26:41,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 80 remaining) [2023-11-21 22:26:41,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 80 remaining) [2023-11-21 22:26:41,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 80 remaining) [2023-11-21 22:26:41,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 80 remaining) [2023-11-21 22:26:41,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (65 of 80 remaining) [2023-11-21 22:26:41,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 80 remaining) [2023-11-21 22:26:41,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 80 remaining) [2023-11-21 22:26:41,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 80 remaining) [2023-11-21 22:26:41,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 80 remaining) [2023-11-21 22:26:41,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 80 remaining) [2023-11-21 22:26:41,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 80 remaining) [2023-11-21 22:26:41,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 80 remaining) [2023-11-21 22:26:41,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 80 remaining) [2023-11-21 22:26:41,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 80 remaining) [2023-11-21 22:26:41,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 80 remaining) [2023-11-21 22:26:41,092 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 80 remaining) [2023-11-21 22:26:41,092 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 80 remaining) [2023-11-21 22:26:41,092 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 80 remaining) [2023-11-21 22:26:41,092 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 80 remaining) [2023-11-21 22:26:41,092 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 80 remaining) [2023-11-21 22:26:41,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 80 remaining) [2023-11-21 22:26:41,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 80 remaining) [2023-11-21 22:26:41,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 80 remaining) [2023-11-21 22:26:41,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 80 remaining) [2023-11-21 22:26:41,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 80 remaining) [2023-11-21 22:26:41,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 80 remaining) [2023-11-21 22:26:41,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 80 remaining) [2023-11-21 22:26:41,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 80 remaining) [2023-11-21 22:26:41,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 80 remaining) [2023-11-21 22:26:41,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 80 remaining) [2023-11-21 22:26:41,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 80 remaining) [2023-11-21 22:26:41,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (38 of 80 remaining) [2023-11-21 22:26:41,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 80 remaining) [2023-11-21 22:26:41,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 80 remaining) [2023-11-21 22:26:41,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 80 remaining) [2023-11-21 22:26:41,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 80 remaining) [2023-11-21 22:26:41,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 80 remaining) [2023-11-21 22:26:41,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 80 remaining) [2023-11-21 22:26:41,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 80 remaining) [2023-11-21 22:26:41,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 80 remaining) [2023-11-21 22:26:41,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37ASSERT_VIOLATIONMEMORY_LEAK (29 of 80 remaining) [2023-11-21 22:26:41,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 80 remaining) [2023-11-21 22:26:41,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 80 remaining) [2023-11-21 22:26:41,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 80 remaining) [2023-11-21 22:26:41,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 80 remaining) [2023-11-21 22:26:41,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (24 of 80 remaining) [2023-11-21 22:26:41,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 80 remaining) [2023-11-21 22:26:41,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 80 remaining) [2023-11-21 22:26:41,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 80 remaining) [2023-11-21 22:26:41,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 80 remaining) [2023-11-21 22:26:41,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 80 remaining) [2023-11-21 22:26:41,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 80 remaining) [2023-11-21 22:26:41,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 80 remaining) [2023-11-21 22:26:41,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 80 remaining) [2023-11-21 22:26:41,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 80 remaining) [2023-11-21 22:26:41,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 80 remaining) [2023-11-21 22:26:41,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 80 remaining) [2023-11-21 22:26:41,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 80 remaining) [2023-11-21 22:26:41,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 80 remaining) [2023-11-21 22:26:41,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 80 remaining) [2023-11-21 22:26:41,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 80 remaining) [2023-11-21 22:26:41,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 80 remaining) [2023-11-21 22:26:41,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 80 remaining) [2023-11-21 22:26:41,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 80 remaining) [2023-11-21 22:26:41,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 80 remaining) [2023-11-21 22:26:41,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 80 remaining) [2023-11-21 22:26:41,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 80 remaining) [2023-11-21 22:26:41,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 80 remaining) [2023-11-21 22:26:41,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 80 remaining) [2023-11-21 22:26:41,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 80 remaining) [2023-11-21 22:26:41,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:26:41,103 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-21 22:26:41,106 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-21 22:26:41,106 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-21 22:26:41,306 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 22:26:41,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 142 transitions, 294 flow [2023-11-21 22:26:41,355 INFO L124 PetriNetUnfolderBase]: 16/157 cut-off events. [2023-11-21 22:26:41,355 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-21 22:26:41,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 157 events. 16/157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 930 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 138. Up to 3 conditions per place. [2023-11-21 22:26:41,357 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 142 transitions, 294 flow [2023-11-21 22:26:41,362 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 131 places, 142 transitions, 294 flow [2023-11-21 22:26:41,368 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:26:41,370 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;@562d57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:26:41,370 INFO L358 AbstractCegarLoop]: Starting to check reachability of 118 error locations. [2023-11-21 22:26:41,372 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:26:41,373 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-21 22:26:41,373 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:26:41,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:26:41,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:26:41,373 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2023-11-21 22:26:41,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:41,374 INFO L85 PathProgramCache]: Analyzing trace with hash 715347, now seen corresponding path program 1 times [2023-11-21 22:26:41,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:41,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730423043] [2023-11-21 22:26:41,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:41,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:41,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:41,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:41,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730423043] [2023-11-21 22:26:41,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730423043] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:41,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:41,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:26:41,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452913362] [2023-11-21 22:26:41,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:41,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:26:41,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:41,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:26:41,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:26:41,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 142 [2023-11-21 22:26:41,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 142 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:41,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:26:41,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 142 [2023-11-21 22:26:41,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:26:47,294 INFO L124 PetriNetUnfolderBase]: 20271/32353 cut-off events. [2023-11-21 22:26:47,295 INFO L125 PetriNetUnfolderBase]: For 302/302 co-relation queries the response was YES. [2023-11-21 22:26:47,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63469 conditions, 32353 events. 20271/32353 cut-off events. For 302/302 co-relation queries the response was YES. Maximal size of possible extension queue 1843. Compared 252021 event pairs, 14471 based on Foata normal form. 0/16173 useless extension candidates. Maximal degree in co-relation 25863. Up to 24875 conditions per place. [2023-11-21 22:26:47,735 INFO L140 encePairwiseOnDemand]: 118/142 looper letters, 213 selfloop transitions, 10 changer transitions 0/237 dead transitions. [2023-11-21 22:26:47,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 237 transitions, 935 flow [2023-11-21 22:26:47,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:26:47,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:26:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 295 transitions. [2023-11-21 22:26:47,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6924882629107981 [2023-11-21 22:26:47,743 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 295 transitions. [2023-11-21 22:26:47,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 295 transitions. [2023-11-21 22:26:47,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:26:47,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 295 transitions. [2023-11-21 22:26:47,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:47,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:47,748 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:47,748 INFO L175 Difference]: Start difference. First operand has 131 places, 142 transitions, 294 flow. Second operand 3 states and 295 transitions. [2023-11-21 22:26:47,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 237 transitions, 935 flow [2023-11-21 22:26:47,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 237 transitions, 935 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-21 22:26:47,762 INFO L231 Difference]: Finished difference. Result has 124 places, 136 transitions, 342 flow [2023-11-21 22:26:47,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=342, PETRI_PLACES=124, PETRI_TRANSITIONS=136} [2023-11-21 22:26:47,766 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, -7 predicate places. [2023-11-21 22:26:47,768 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 136 transitions, 342 flow [2023-11-21 22:26:47,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:47,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:26:47,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:26:47,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 22:26:47,775 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2023-11-21 22:26:47,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:47,776 INFO L85 PathProgramCache]: Analyzing trace with hash 715348, now seen corresponding path program 1 times [2023-11-21 22:26:47,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:47,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648276870] [2023-11-21 22:26:47,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:47,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:47,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:47,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648276870] [2023-11-21 22:26:47,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648276870] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:47,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:47,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:26:47,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298482690] [2023-11-21 22:26:47,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:47,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:26:47,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:47,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:26:47,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:26:47,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 142 [2023-11-21 22:26:47,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 136 transitions, 342 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:47,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:26:47,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 142 [2023-11-21 22:26:47,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:26:51,880 INFO L124 PetriNetUnfolderBase]: 14687/23900 cut-off events. [2023-11-21 22:26:51,881 INFO L125 PetriNetUnfolderBase]: For 3197/3197 co-relation queries the response was YES. [2023-11-21 22:26:51,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50120 conditions, 23900 events. 14687/23900 cut-off events. For 3197/3197 co-relation queries the response was YES. Maximal size of possible extension queue 1607. Compared 183099 event pairs, 12324 based on Foata normal form. 2529/14782 useless extension candidates. Maximal degree in co-relation 45428. Up to 22651 conditions per place. [2023-11-21 22:26:52,079 INFO L140 encePairwiseOnDemand]: 140/142 looper letters, 118 selfloop transitions, 1 changer transitions 0/135 dead transitions. [2023-11-21 22:26:52,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 135 transitions, 578 flow [2023-11-21 22:26:52,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:26:52,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:26:52,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 160 transitions. [2023-11-21 22:26:52,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3755868544600939 [2023-11-21 22:26:52,082 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 160 transitions. [2023-11-21 22:26:52,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 160 transitions. [2023-11-21 22:26:52,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:26:52,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 160 transitions. [2023-11-21 22:26:52,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:52,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:52,087 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:52,087 INFO L175 Difference]: Start difference. First operand has 124 places, 136 transitions, 342 flow. Second operand 3 states and 160 transitions. [2023-11-21 22:26:52,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 135 transitions, 578 flow [2023-11-21 22:26:52,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 135 transitions, 558 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:26:52,124 INFO L231 Difference]: Finished difference. Result has 123 places, 135 transitions, 322 flow [2023-11-21 22:26:52,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=322, PETRI_PLACES=123, PETRI_TRANSITIONS=135} [2023-11-21 22:26:52,126 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, -8 predicate places. [2023-11-21 22:26:52,127 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 135 transitions, 322 flow [2023-11-21 22:26:52,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:52,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:26:52,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:52,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 22:26:52,128 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2023-11-21 22:26:52,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:52,129 INFO L85 PathProgramCache]: Analyzing trace with hash -761132173, now seen corresponding path program 1 times [2023-11-21 22:26:52,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:52,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359472770] [2023-11-21 22:26:52,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:52,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:52,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:52,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:52,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359472770] [2023-11-21 22:26:52,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359472770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:52,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:52,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:26:52,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641497679] [2023-11-21 22:26:52,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:52,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:26:52,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:52,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:26:52,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:26:52,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 142 [2023-11-21 22:26:52,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 135 transitions, 322 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:52,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:26:52,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 142 [2023-11-21 22:26:52,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:26:56,214 INFO L124 PetriNetUnfolderBase]: 14786/24443 cut-off events. [2023-11-21 22:26:56,214 INFO L125 PetriNetUnfolderBase]: For 1504/1504 co-relation queries the response was YES. [2023-11-21 22:26:56,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50153 conditions, 24443 events. 14786/24443 cut-off events. For 1504/1504 co-relation queries the response was YES. Maximal size of possible extension queue 1735. Compared 194835 event pairs, 7586 based on Foata normal form. 0/14118 useless extension candidates. Maximal degree in co-relation 50143. Up to 12245 conditions per place. [2023-11-21 22:26:56,381 INFO L140 encePairwiseOnDemand]: 83/142 looper letters, 247 selfloop transitions, 63 changer transitions 0/325 dead transitions. [2023-11-21 22:26:56,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 325 transitions, 1377 flow [2023-11-21 22:26:56,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:26:56,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:26:56,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 382 transitions. [2023-11-21 22:26:56,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6725352112676056 [2023-11-21 22:26:56,384 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 382 transitions. [2023-11-21 22:26:56,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 382 transitions. [2023-11-21 22:26:56,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:26:56,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 382 transitions. [2023-11-21 22:26:56,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:56,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:56,389 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:56,389 INFO L175 Difference]: Start difference. First operand has 123 places, 135 transitions, 322 flow. Second operand 4 states and 382 transitions. [2023-11-21 22:26:56,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 325 transitions, 1377 flow [2023-11-21 22:26:56,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 325 transitions, 1376 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:26:56,403 INFO L231 Difference]: Finished difference. Result has 128 places, 197 transitions, 901 flow [2023-11-21 22:26:56,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=901, PETRI_PLACES=128, PETRI_TRANSITIONS=197} [2023-11-21 22:26:56,406 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, -3 predicate places. [2023-11-21 22:26:56,406 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 197 transitions, 901 flow [2023-11-21 22:26:56,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:56,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:26:56,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:56,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 22:26:56,407 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2023-11-21 22:26:56,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:56,408 INFO L85 PathProgramCache]: Analyzing trace with hash -761132172, now seen corresponding path program 1 times [2023-11-21 22:26:56,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:56,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753020127] [2023-11-21 22:26:56,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:56,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:56,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:56,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:56,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753020127] [2023-11-21 22:26:56,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753020127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:56,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:56,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:26:56,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566284634] [2023-11-21 22:26:56,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:56,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:26:56,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:56,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:26:56,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:26:56,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 142 [2023-11-21 22:26:56,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 197 transitions, 901 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:56,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:26:56,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 142 [2023-11-21 22:26:56,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:26:59,111 INFO L124 PetriNetUnfolderBase]: 10619/17696 cut-off events. [2023-11-21 22:26:59,111 INFO L125 PetriNetUnfolderBase]: For 5349/5349 co-relation queries the response was YES. [2023-11-21 22:26:59,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44989 conditions, 17696 events. 10619/17696 cut-off events. For 5349/5349 co-relation queries the response was YES. Maximal size of possible extension queue 1363. Compared 136214 event pairs, 7688 based on Foata normal form. 1108/12373 useless extension candidates. Maximal degree in co-relation 44975. Up to 16483 conditions per place. [2023-11-21 22:26:59,380 INFO L140 encePairwiseOnDemand]: 129/142 looper letters, 168 selfloop transitions, 1 changer transitions 0/185 dead transitions. [2023-11-21 22:26:59,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 185 transitions, 1215 flow [2023-11-21 22:26:59,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:26:59,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:26:59,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-11-21 22:26:59,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38028169014084506 [2023-11-21 22:26:59,383 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-11-21 22:26:59,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-11-21 22:26:59,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:26:59,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-11-21 22:26:59,384 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) [2023-11-21 22:26:59,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:59,385 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:59,386 INFO L175 Difference]: Start difference. First operand has 128 places, 197 transitions, 901 flow. Second operand 3 states and 162 transitions. [2023-11-21 22:26:59,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 185 transitions, 1215 flow [2023-11-21 22:26:59,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 185 transitions, 1215 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-21 22:26:59,414 INFO L231 Difference]: Finished difference. Result has 118 places, 185 transitions, 879 flow [2023-11-21 22:26:59,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=879, PETRI_PLACES=118, PETRI_TRANSITIONS=185} [2023-11-21 22:26:59,416 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, -13 predicate places. [2023-11-21 22:26:59,417 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 185 transitions, 879 flow [2023-11-21 22:26:59,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:59,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:26:59,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:59,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 22:26:59,418 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2023-11-21 22:26:59,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:59,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1303549630, now seen corresponding path program 1 times [2023-11-21 22:26:59,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:59,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972394604] [2023-11-21 22:26:59,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:59,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:59,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:59,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972394604] [2023-11-21 22:26:59,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972394604] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:59,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:59,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:26:59,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587022294] [2023-11-21 22:26:59,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:59,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:26:59,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:59,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:26:59,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:26:59,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 142 [2023-11-21 22:26:59,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 185 transitions, 879 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:59,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:26:59,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 142 [2023-11-21 22:26:59,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:27:02,253 INFO L124 PetriNetUnfolderBase]: 10834/17850 cut-off events. [2023-11-21 22:27:02,253 INFO L125 PetriNetUnfolderBase]: For 5314/5314 co-relation queries the response was YES. [2023-11-21 22:27:02,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45547 conditions, 17850 events. 10834/17850 cut-off events. For 5314/5314 co-relation queries the response was YES. Maximal size of possible extension queue 1301. Compared 137538 event pairs, 5104 based on Foata normal form. 0/11785 useless extension candidates. Maximal degree in co-relation 45531. Up to 12133 conditions per place. [2023-11-21 22:27:02,366 INFO L140 encePairwiseOnDemand]: 130/142 looper letters, 219 selfloop transitions, 16 changer transitions 0/249 dead transitions. [2023-11-21 22:27:02,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 249 transitions, 1590 flow [2023-11-21 22:27:02,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:27:02,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:27:02,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 211 transitions. [2023-11-21 22:27:02,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4953051643192488 [2023-11-21 22:27:02,368 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 211 transitions. [2023-11-21 22:27:02,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 211 transitions. [2023-11-21 22:27:02,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:27:02,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 211 transitions. [2023-11-21 22:27:02,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:02,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:02,371 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:02,371 INFO L175 Difference]: Start difference. First operand has 118 places, 185 transitions, 879 flow. Second operand 3 states and 211 transitions. [2023-11-21 22:27:02,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 249 transitions, 1590 flow [2023-11-21 22:27:02,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 249 transitions, 1589 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:27:02,408 INFO L231 Difference]: Finished difference. Result has 121 places, 195 transitions, 1034 flow [2023-11-21 22:27:02,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1034, PETRI_PLACES=121, PETRI_TRANSITIONS=195} [2023-11-21 22:27:02,409 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, -10 predicate places. [2023-11-21 22:27:02,409 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 195 transitions, 1034 flow [2023-11-21 22:27:02,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:02,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:27:02,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:27:02,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 22:27:02,410 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2023-11-21 22:27:02,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:27:02,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1303549629, now seen corresponding path program 1 times [2023-11-21 22:27:02,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:27:02,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784639698] [2023-11-21 22:27:02,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:27:02,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:27:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:02,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:27:02,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:27:02,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784639698] [2023-11-21 22:27:02,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784639698] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:27:02,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:27:02,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:27:02,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231632534] [2023-11-21 22:27:02,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:27:02,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:27:02,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:27:02,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:27:02,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:27:02,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 142 [2023-11-21 22:27:02,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 195 transitions, 1034 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:02,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:27:02,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 142 [2023-11-21 22:27:02,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:27:04,755 INFO L124 PetriNetUnfolderBase]: 10115/16694 cut-off events. [2023-11-21 22:27:04,755 INFO L125 PetriNetUnfolderBase]: For 10128/10128 co-relation queries the response was YES. [2023-11-21 22:27:04,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44578 conditions, 16694 events. 10115/16694 cut-off events. For 10128/10128 co-relation queries the response was YES. Maximal size of possible extension queue 1183. Compared 127157 event pairs, 5040 based on Foata normal form. 131/11536 useless extension candidates. Maximal degree in co-relation 44561. Up to 10969 conditions per place. [2023-11-21 22:27:04,870 INFO L140 encePairwiseOnDemand]: 136/142 looper letters, 199 selfloop transitions, 15 changer transitions 0/230 dead transitions. [2023-11-21 22:27:04,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 230 transitions, 1563 flow [2023-11-21 22:27:04,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:27:04,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:27:04,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 192 transitions. [2023-11-21 22:27:04,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4507042253521127 [2023-11-21 22:27:04,873 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 192 transitions. [2023-11-21 22:27:04,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 192 transitions. [2023-11-21 22:27:04,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:27:04,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 192 transitions. [2023-11-21 22:27:04,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:04,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:04,876 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:04,876 INFO L175 Difference]: Start difference. First operand has 121 places, 195 transitions, 1034 flow. Second operand 3 states and 192 transitions. [2023-11-21 22:27:04,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 230 transitions, 1563 flow [2023-11-21 22:27:04,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 230 transitions, 1531 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:27:04,960 INFO L231 Difference]: Finished difference. Result has 118 places, 190 transitions, 1010 flow [2023-11-21 22:27:04,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=980, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1010, PETRI_PLACES=118, PETRI_TRANSITIONS=190} [2023-11-21 22:27:04,962 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, -13 predicate places. [2023-11-21 22:27:04,962 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 190 transitions, 1010 flow [2023-11-21 22:27:04,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:04,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:27:04,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:27:04,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 22:27:04,963 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2023-11-21 22:27:04,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:27:04,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1303515759, now seen corresponding path program 1 times [2023-11-21 22:27:04,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:27:04,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719289596] [2023-11-21 22:27:04,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:27:04,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:27:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:05,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:27:05,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:27:05,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719289596] [2023-11-21 22:27:05,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719289596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:27:05,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:27:05,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:27:05,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076273140] [2023-11-21 22:27:05,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:27:05,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:27:05,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:27:05,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:27:05,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:27:05,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 142 [2023-11-21 22:27:05,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 190 transitions, 1010 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:05,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:27:05,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 142 [2023-11-21 22:27:05,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:27:07,082 INFO L124 PetriNetUnfolderBase]: 9665/15975 cut-off events. [2023-11-21 22:27:07,083 INFO L125 PetriNetUnfolderBase]: For 9717/9717 co-relation queries the response was YES. [2023-11-21 22:27:07,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42355 conditions, 15975 events. 9665/15975 cut-off events. For 9717/9717 co-relation queries the response was YES. Maximal size of possible extension queue 1080. Compared 121575 event pairs, 4448 based on Foata normal form. 131/11156 useless extension candidates. Maximal degree in co-relation 42338. Up to 10002 conditions per place. [2023-11-21 22:27:07,162 INFO L140 encePairwiseOnDemand]: 136/142 looper letters, 203 selfloop transitions, 11 changer transitions 0/229 dead transitions. [2023-11-21 22:27:07,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 229 transitions, 1579 flow [2023-11-21 22:27:07,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:27:07,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:27:07,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 190 transitions. [2023-11-21 22:27:07,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460093896713615 [2023-11-21 22:27:07,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 190 transitions. [2023-11-21 22:27:07,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 190 transitions. [2023-11-21 22:27:07,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:27:07,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 190 transitions. [2023-11-21 22:27:07,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:07,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:07,167 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:07,167 INFO L175 Difference]: Start difference. First operand has 118 places, 190 transitions, 1010 flow. Second operand 3 states and 190 transitions. [2023-11-21 22:27:07,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 229 transitions, 1579 flow [2023-11-21 22:27:07,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 229 transitions, 1549 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:27:07,211 INFO L231 Difference]: Finished difference. Result has 115 places, 185 transitions, 980 flow [2023-11-21 22:27:07,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=980, PETRI_PLACES=115, PETRI_TRANSITIONS=185} [2023-11-21 22:27:07,213 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, -16 predicate places. [2023-11-21 22:27:07,213 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 185 transitions, 980 flow [2023-11-21 22:27:07,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:07,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:27:07,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:27:07,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-21 22:27:07,214 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2023-11-21 22:27:07,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:27:07,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1303549628, now seen corresponding path program 1 times [2023-11-21 22:27:07,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:27:07,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725435660] [2023-11-21 22:27:07,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:27:07,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:27:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:07,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:27:07,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:27:07,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725435660] [2023-11-21 22:27:07,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725435660] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:27:07,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:27:07,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:27:07,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370246544] [2023-11-21 22:27:07,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:27:07,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:27:07,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:27:07,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:27:07,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:27:07,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 142 [2023-11-21 22:27:07,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 185 transitions, 980 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:07,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:27:07,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 142 [2023-11-21 22:27:07,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:27:11,959 INFO L124 PetriNetUnfolderBase]: 20237/32644 cut-off events. [2023-11-21 22:27:11,959 INFO L125 PetriNetUnfolderBase]: For 17738/18494 co-relation queries the response was YES. [2023-11-21 22:27:12,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87350 conditions, 32644 events. 20237/32644 cut-off events. For 17738/18494 co-relation queries the response was YES. Maximal size of possible extension queue 1696. Compared 255999 event pairs, 6636 based on Foata normal form. 292/23585 useless extension candidates. Maximal degree in co-relation 87333. Up to 19844 conditions per place. [2023-11-21 22:27:12,152 INFO L140 encePairwiseOnDemand]: 130/142 looper letters, 428 selfloop transitions, 33 changer transitions 0/474 dead transitions. [2023-11-21 22:27:12,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 474 transitions, 3410 flow [2023-11-21 22:27:12,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:27:12,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 22:27:12,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 341 transitions. [2023-11-21 22:27:12,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4802816901408451 [2023-11-21 22:27:12,155 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 341 transitions. [2023-11-21 22:27:12,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 341 transitions. [2023-11-21 22:27:12,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:27:12,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 341 transitions. [2023-11-21 22:27:12,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 68.2) internal successors, (341), 5 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:12,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:12,159 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:12,160 INFO L175 Difference]: Start difference. First operand has 115 places, 185 transitions, 980 flow. Second operand 5 states and 341 transitions. [2023-11-21 22:27:12,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 474 transitions, 3410 flow [2023-11-21 22:27:12,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 474 transitions, 3366 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:27:12,297 INFO L231 Difference]: Finished difference. Result has 120 places, 217 transitions, 1292 flow [2023-11-21 22:27:12,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1292, PETRI_PLACES=120, PETRI_TRANSITIONS=217} [2023-11-21 22:27:12,298 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, -11 predicate places. [2023-11-21 22:27:12,298 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 217 transitions, 1292 flow [2023-11-21 22:27:12,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:12,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:27:12,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:27:12,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-21 22:27:12,299 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2023-11-21 22:27:12,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:27:12,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1303515766, now seen corresponding path program 1 times [2023-11-21 22:27:12,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:27:12,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079709064] [2023-11-21 22:27:12,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:27:12,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:27:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:12,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:27:12,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:27:12,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079709064] [2023-11-21 22:27:12,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079709064] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:27:12,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:27:12,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:27:12,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476637064] [2023-11-21 22:27:12,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:27:12,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:27:12,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:27:12,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:27:12,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:27:12,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 142 [2023-11-21 22:27:12,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 217 transitions, 1292 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:12,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:27:12,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 142 [2023-11-21 22:27:12,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:27:16,464 INFO L124 PetriNetUnfolderBase]: 16059/25875 cut-off events. [2023-11-21 22:27:16,464 INFO L125 PetriNetUnfolderBase]: For 16637/16637 co-relation queries the response was YES. [2023-11-21 22:27:16,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74327 conditions, 25875 events. 16059/25875 cut-off events. For 16637/16637 co-relation queries the response was YES. Maximal size of possible extension queue 1446. Compared 199770 event pairs, 6362 based on Foata normal form. 0/19164 useless extension candidates. Maximal degree in co-relation 74306. Up to 17148 conditions per place. [2023-11-21 22:27:16,633 INFO L140 encePairwiseOnDemand]: 129/142 looper letters, 254 selfloop transitions, 20 changer transitions 0/287 dead transitions. [2023-11-21 22:27:16,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 287 transitions, 2160 flow [2023-11-21 22:27:16,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:27:16,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:27:16,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 206 transitions. [2023-11-21 22:27:16,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835680751173709 [2023-11-21 22:27:16,635 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 206 transitions. [2023-11-21 22:27:16,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 206 transitions. [2023-11-21 22:27:16,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:27:16,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 206 transitions. [2023-11-21 22:27:16,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:16,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:16,638 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:16,638 INFO L175 Difference]: Start difference. First operand has 120 places, 217 transitions, 1292 flow. Second operand 3 states and 206 transitions. [2023-11-21 22:27:16,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 287 transitions, 2160 flow [2023-11-21 22:27:16,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 287 transitions, 2160 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-21 22:27:16,736 INFO L231 Difference]: Finished difference. Result has 124 places, 229 transitions, 1491 flow [2023-11-21 22:27:16,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1491, PETRI_PLACES=124, PETRI_TRANSITIONS=229} [2023-11-21 22:27:16,736 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, -7 predicate places. [2023-11-21 22:27:16,737 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 229 transitions, 1491 flow [2023-11-21 22:27:16,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:16,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:27:16,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:27:16,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-21 22:27:16,737 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2023-11-21 22:27:16,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:27:16,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1303515764, now seen corresponding path program 1 times [2023-11-21 22:27:16,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:27:16,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388970391] [2023-11-21 22:27:16,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:27:16,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:27:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:27:16,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:27:16,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388970391] [2023-11-21 22:27:16,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388970391] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:27:16,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:27:16,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:27:16,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736175594] [2023-11-21 22:27:16,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:27:16,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:27:16,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:27:16,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:27:16,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:27:16,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 142 [2023-11-21 22:27:16,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 229 transitions, 1491 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:16,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:27:16,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 142 [2023-11-21 22:27:16,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:27:21,181 INFO L124 PetriNetUnfolderBase]: 16743/27127 cut-off events. [2023-11-21 22:27:21,181 INFO L125 PetriNetUnfolderBase]: For 27564/27564 co-relation queries the response was YES. [2023-11-21 22:27:21,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81193 conditions, 27127 events. 16743/27127 cut-off events. For 27564/27564 co-relation queries the response was YES. Maximal size of possible extension queue 1572. Compared 209380 event pairs, 7662 based on Foata normal form. 0/21164 useless extension candidates. Maximal degree in co-relation 81170. Up to 17432 conditions per place. [2023-11-21 22:27:21,356 INFO L140 encePairwiseOnDemand]: 129/142 looper letters, 269 selfloop transitions, 17 changer transitions 0/301 dead transitions. [2023-11-21 22:27:21,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 301 transitions, 2385 flow [2023-11-21 22:27:21,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:27:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:27:21,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2023-11-21 22:27:21,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046948356807511 [2023-11-21 22:27:21,358 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2023-11-21 22:27:21,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2023-11-21 22:27:21,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:27:21,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2023-11-21 22:27:21,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:21,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:21,360 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:21,360 INFO L175 Difference]: Start difference. First operand has 124 places, 229 transitions, 1491 flow. Second operand 3 states and 215 transitions. [2023-11-21 22:27:21,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 301 transitions, 2385 flow [2023-11-21 22:27:21,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 301 transitions, 2335 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-21 22:27:21,482 INFO L231 Difference]: Finished difference. Result has 125 places, 229 transitions, 1502 flow [2023-11-21 22:27:21,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1443, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1502, PETRI_PLACES=125, PETRI_TRANSITIONS=229} [2023-11-21 22:27:21,483 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, -6 predicate places. [2023-11-21 22:27:21,483 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 229 transitions, 1502 flow [2023-11-21 22:27:21,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:21,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:27:21,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:27:21,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-21 22:27:21,484 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2023-11-21 22:27:21,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:27:21,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1303515763, now seen corresponding path program 1 times [2023-11-21 22:27:21,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:27:21,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281608266] [2023-11-21 22:27:21,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:27:21,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:27:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:21,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:27:21,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:27:21,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281608266] [2023-11-21 22:27:21,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281608266] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:27:21,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:27:21,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:27:21,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041842788] [2023-11-21 22:27:21,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:27:21,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:27:21,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:27:21,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:27:21,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:27:21,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 142 [2023-11-21 22:27:21,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 229 transitions, 1502 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:27:21,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:27:21,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 142 [2023-11-21 22:27:21,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand