./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread/reorder_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread/reorder_2.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --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 eaeb1d72262bd1e189945b98598b3acb68c08676109949c39074605b8c62cb69 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:10:42,794 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:10:42,829 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:10:42,832 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:10:42,833 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:10:42,846 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:10:42,846 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:10:42,846 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:10:42,847 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:10:42,847 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:10:42,847 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:10:42,847 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:10:42,847 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:10:42,847 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:10:42,847 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:10:42,847 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:10:42,847 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:10:42,848 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:10:42,848 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:10:42,848 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:10:42,848 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:10:42,848 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:10:42,848 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:10:42,848 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:10:42,848 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:10:42,848 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:10:42,848 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:10:42,848 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:10:42,848 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:10:42,849 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:10:42,849 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:10:42,849 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:10:42,849 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:10:42,849 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:10:42,849 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:10:42,849 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:10:42,849 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:10:42,849 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:10:42,849 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:10:42,850 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:10:42,850 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:10:42,850 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:10:42,850 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux 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 -> eaeb1d72262bd1e189945b98598b3acb68c08676109949c39074605b8c62cb69 [2025-02-08 08:10:43,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:10:43,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:10:43,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:10:43,151 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:10:43,151 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:10:43,152 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/reorder_2.i [2025-02-08 08:10:44,245 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b5e51e4c2/1c43849b019d47c384f26f96e017a6b1/FLAGdfe838e12 [2025-02-08 08:10:44,615 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:10:44,618 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/reorder_2.i [2025-02-08 08:10:44,636 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b5e51e4c2/1c43849b019d47c384f26f96e017a6b1/FLAGdfe838e12 [2025-02-08 08:10:44,822 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b5e51e4c2/1c43849b019d47c384f26f96e017a6b1 [2025-02-08 08:10:44,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:10:44,825 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:10:44,826 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:10:44,826 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:10:44,832 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:10:44,833 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:10:44" (1/1) ... [2025-02-08 08:10:44,834 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ca9014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:10:44, skipping insertion in model container [2025-02-08 08:10:44,834 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:10:44" (1/1) ... [2025-02-08 08:10:44,869 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:10:45,248 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:10:45,263 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:10:45,307 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:10:45,360 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:10:45,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:10:45 WrapperNode [2025-02-08 08:10:45,361 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:10:45,362 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:10:45,362 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:10:45,362 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:10:45,367 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:10:45" (1/1) ... [2025-02-08 08:10:45,377 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:10:45" (1/1) ... [2025-02-08 08:10:45,397 INFO L138 Inliner]: procedures = 372, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 127 [2025-02-08 08:10:45,397 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:10:45,397 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:10:45,397 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:10:45,398 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:10:45,404 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:10:45" (1/1) ... [2025-02-08 08:10:45,404 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:10:45" (1/1) ... [2025-02-08 08:10:45,406 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:10:45" (1/1) ... [2025-02-08 08:10:45,414 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2025-02-08 08:10:45,414 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:10:45" (1/1) ... [2025-02-08 08:10:45,414 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:10:45" (1/1) ... [2025-02-08 08:10:45,420 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:10:45" (1/1) ... [2025-02-08 08:10:45,421 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:10:45" (1/1) ... [2025-02-08 08:10:45,422 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:10:45" (1/1) ... [2025-02-08 08:10:45,422 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:10:45" (1/1) ... [2025-02-08 08:10:45,424 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:10:45,424 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:10:45,424 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:10:45,424 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:10:45,425 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:10:45" (1/1) ... [2025-02-08 08:10:45,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:10:45,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:10:45,451 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-08 08:10:45,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-08 08:10:45,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-08 08:10:45,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-08 08:10:45,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-08 08:10:45,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-08 08:10:45,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 08:10:45,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 08:10:45,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-08 08:10:45,470 INFO L130 BoogieDeclarations]: Found specification of procedure setThread [2025-02-08 08:10:45,470 INFO L138 BoogieDeclarations]: Found implementation of procedure setThread [2025-02-08 08:10:45,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 08:10:45,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 08:10:45,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-08 08:10:45,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:10:45,472 INFO L130 BoogieDeclarations]: Found specification of procedure checkThread [2025-02-08 08:10:45,472 INFO L138 BoogieDeclarations]: Found implementation of procedure checkThread [2025-02-08 08:10:45,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:10:45,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 08:10:45,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-08 08:10:45,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:10:45,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:10:45,473 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-08 08:10:45,584 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:10:45,586 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:10:45,733 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L1260: havoc main_~#setPool~0#1.base, main_~#setPool~0#1.offset; [2025-02-08 08:10:45,733 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L1260-1: SUMMARY for call ULTIMATE.dealloc(main_~#setPool~0#1.base, main_~#setPool~0#1.offset); srcloc: null [2025-02-08 08:10:45,733 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L1261: havoc main_~#checkPool~0#1.base, main_~#checkPool~0#1.offset; [2025-02-08 08:10:45,733 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L1261-1: SUMMARY for call ULTIMATE.dealloc(main_~#checkPool~0#1.base, main_~#checkPool~0#1.offset); srcloc: null [2025-02-08 08:10:45,734 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:10:45,734 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:10:45,841 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:10:45,845 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:10:45,846 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:10:45 BoogieIcfgContainer [2025-02-08 08:10:45,846 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:10:45,847 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:10:45,847 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:10:45,850 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:10:45,850 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:10:44" (1/3) ... [2025-02-08 08:10:45,851 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d3c5042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:10:45, skipping insertion in model container [2025-02-08 08:10:45,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:10:45" (2/3) ... [2025-02-08 08:10:45,851 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d3c5042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:10:45, skipping insertion in model container [2025-02-08 08:10:45,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:10:45" (3/3) ... [2025-02-08 08:10:45,856 INFO L128 eAbstractionObserver]: Analyzing ICFG reorder_2.i [2025-02-08 08:10:45,866 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:10:45,867 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG reorder_2.i that has 3 procedures, 50 locations, 1 initial locations, 4 loop locations, and 12 error locations. [2025-02-08 08:10:45,867 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:10:45,896 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-02-08 08:10:45,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 59 transitions, 138 flow [2025-02-08 08:10:45,992 INFO L124 PetriNetUnfolderBase]: 14/137 cut-off events. [2025-02-08 08:10:45,996 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-02-08 08:10:45,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 137 events. 14/137 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 674 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 69. Up to 7 conditions per place. [2025-02-08 08:10:46,000 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 59 transitions, 138 flow [2025-02-08 08:10:46,003 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 59 transitions, 138 flow [2025-02-08 08:10:46,014 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:10:46,028 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@7eb9313f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:10:46,028 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2025-02-08 08:10:46,032 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:10:46,033 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2025-02-08 08:10:46,033 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:10:46,033 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:10:46,033 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-08 08:10:46,033 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2025-02-08 08:10:46,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:10:46,040 INFO L85 PathProgramCache]: Analyzing trace with hash 10403718, now seen corresponding path program 1 times [2025-02-08 08:10:46,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:10:46,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178655299] [2025-02-08 08:10:46,045 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:10:46,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:10:46,108 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-08 08:10:46,115 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-08 08:10:46,116 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:10:46,116 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:10:46,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:10:46,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:10:46,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178655299] [2025-02-08 08:10:46,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178655299] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:10:46,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:10:46,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:10:46,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883554270] [2025-02-08 08:10:46,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:10:46,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-08 08:10:46,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:10:46,188 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-08 08:10:46,189 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-08 08:10:46,190 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 59 [2025-02-08 08:10:46,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 138 flow. Second operand has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:10:46,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:10:46,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 59 [2025-02-08 08:10:46,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:10:46,318 INFO L124 PetriNetUnfolderBase]: 286/757 cut-off events. [2025-02-08 08:10:46,318 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2025-02-08 08:10:46,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1322 conditions, 757 events. 286/757 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4659 event pairs, 263 based on Foata normal form. 75/729 useless extension candidates. Maximal degree in co-relation 1022. Up to 528 conditions per place. [2025-02-08 08:10:46,326 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 28 selfloop transitions, 0 changer transitions 0/53 dead transitions. [2025-02-08 08:10:46,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 182 flow [2025-02-08 08:10:46,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-08 08:10:46,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-02-08 08:10:46,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 83 transitions. [2025-02-08 08:10:46,339 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7033898305084746 [2025-02-08 08:10:46,340 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 138 flow. Second operand 2 states and 83 transitions. [2025-02-08 08:10:46,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 182 flow [2025-02-08 08:10:46,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 53 transitions, 182 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-08 08:10:46,348 INFO L231 Difference]: Finished difference. Result has 54 places, 53 transitions, 126 flow [2025-02-08 08:10:46,351 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=126, PETRI_PLACES=54, PETRI_TRANSITIONS=53} [2025-02-08 08:10:46,353 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, -2 predicate places. [2025-02-08 08:10:46,355 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 53 transitions, 126 flow [2025-02-08 08:10:46,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:10:46,355 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:10:46,355 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-02-08 08:10:46,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:10:46,356 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2025-02-08 08:10:46,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:10:46,357 INFO L85 PathProgramCache]: Analyzing trace with hash 322540056, now seen corresponding path program 1 times [2025-02-08 08:10:46,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:10:46,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774381521] [2025-02-08 08:10:46,357 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:10:46,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:10:46,366 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:10:46,387 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:10:46,388 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:10:46,388 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:10:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:10:46,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:10:46,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774381521] [2025-02-08 08:10:46,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774381521] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:10:46,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:10:46,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:10:46,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27117221] [2025-02-08 08:10:46,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:10:46,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:10:46,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:10:46,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:10:46,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:10:46,764 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 59 [2025-02-08 08:10:46,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:10:46,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:10:46,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 59 [2025-02-08 08:10:46,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:10:47,015 INFO L124 PetriNetUnfolderBase]: 638/1720 cut-off events. [2025-02-08 08:10:47,016 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2025-02-08 08:10:47,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2962 conditions, 1720 events. 638/1720 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13259 event pairs, 444 based on Foata normal form. 1/1524 useless extension candidates. Maximal degree in co-relation 2957. Up to 603 conditions per place. [2025-02-08 08:10:47,025 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 57 selfloop transitions, 4 changer transitions 0/84 dead transitions. [2025-02-08 08:10:47,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 84 transitions, 328 flow [2025-02-08 08:10:47,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:10:47,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:10:47,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 155 transitions. [2025-02-08 08:10:47,027 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6567796610169492 [2025-02-08 08:10:47,028 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 126 flow. Second operand 4 states and 155 transitions. [2025-02-08 08:10:47,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 84 transitions, 328 flow [2025-02-08 08:10:47,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 84 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-08 08:10:47,031 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 152 flow [2025-02-08 08:10:47,032 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2025-02-08 08:10:47,033 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2025-02-08 08:10:47,034 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 152 flow [2025-02-08 08:10:47,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:10:47,034 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:10:47,034 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-02-08 08:10:47,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:10:47,035 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2025-02-08 08:10:47,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:10:47,036 INFO L85 PathProgramCache]: Analyzing trace with hash 322540055, now seen corresponding path program 1 times [2025-02-08 08:10:47,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:10:47,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876600075] [2025-02-08 08:10:47,036 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:10:47,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:10:47,045 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:10:47,050 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:10:47,050 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:10:47,050 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:10:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:10:47,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:10:47,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876600075] [2025-02-08 08:10:47,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876600075] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:10:47,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:10:47,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:10:47,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442293877] [2025-02-08 08:10:47,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:10:47,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:10:47,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:10:47,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:10:47,112 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:10:47,130 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 59 [2025-02-08 08:10:47,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:10:47,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:10:47,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 59 [2025-02-08 08:10:47,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:10:47,271 INFO L124 PetriNetUnfolderBase]: 638/1692 cut-off events. [2025-02-08 08:10:47,271 INFO L125 PetriNetUnfolderBase]: For 111/114 co-relation queries the response was YES. [2025-02-08 08:10:47,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2971 conditions, 1692 events. 638/1692 cut-off events. For 111/114 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13138 event pairs, 448 based on Foata normal form. 0/1525 useless extension candidates. Maximal degree in co-relation 2963. Up to 897 conditions per place. [2025-02-08 08:10:47,277 INFO L140 encePairwiseOnDemand]: 55/59 looper letters, 36 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2025-02-08 08:10:47,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 60 transitions, 240 flow [2025-02-08 08:10:47,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:10:47,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:10:47,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2025-02-08 08:10:47,280 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.576271186440678 [2025-02-08 08:10:47,280 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 152 flow. Second operand 3 states and 102 transitions. [2025-02-08 08:10:47,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 60 transitions, 240 flow [2025-02-08 08:10:47,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 60 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:10:47,281 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 152 flow [2025-02-08 08:10:47,282 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2025-02-08 08:10:47,282 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2025-02-08 08:10:47,282 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 152 flow [2025-02-08 08:10:47,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:10:47,282 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:10:47,282 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:10:47,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 08:10:47,283 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2025-02-08 08:10:47,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:10:47,284 INFO L85 PathProgramCache]: Analyzing trace with hash 219378453, now seen corresponding path program 1 times [2025-02-08 08:10:47,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:10:47,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81989816] [2025-02-08 08:10:47,284 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:10:47,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:10:47,292 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 08:10:47,299 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 08:10:47,299 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:10:47,299 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:10:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:10:47,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:10:47,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81989816] [2025-02-08 08:10:47,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81989816] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:10:47,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:10:47,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:10:47,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399291765] [2025-02-08 08:10:47,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:10:47,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:10:47,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:10:47,473 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:10:47,473 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:10:47,507 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 59 [2025-02-08 08:10:47,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:10:47,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:10:47,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 59 [2025-02-08 08:10:47,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:10:47,753 INFO L124 PetriNetUnfolderBase]: 796/2028 cut-off events. [2025-02-08 08:10:47,754 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2025-02-08 08:10:47,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3661 conditions, 2028 events. 796/2028 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15730 event pairs, 332 based on Foata normal form. 1/1717 useless extension candidates. Maximal degree in co-relation 3653. Up to 1438 conditions per place. [2025-02-08 08:10:47,763 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 44 selfloop transitions, 7 changer transitions 2/71 dead transitions. [2025-02-08 08:10:47,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 71 transitions, 301 flow [2025-02-08 08:10:47,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:10:47,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:10:47,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2025-02-08 08:10:47,764 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5635593220338984 [2025-02-08 08:10:47,764 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 152 flow. Second operand 4 states and 133 transitions. [2025-02-08 08:10:47,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 71 transitions, 301 flow [2025-02-08 08:10:47,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 71 transitions, 293 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:10:47,767 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 186 flow [2025-02-08 08:10:47,767 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2025-02-08 08:10:47,767 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 5 predicate places. [2025-02-08 08:10:47,767 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 186 flow [2025-02-08 08:10:47,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:10:47,768 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:10:47,768 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:10:47,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-08 08:10:47,768 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2025-02-08 08:10:47,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:10:47,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1789204140, now seen corresponding path program 1 times [2025-02-08 08:10:47,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:10:47,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376029874] [2025-02-08 08:10:47,769 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:10:47,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:10:47,775 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 08:10:47,778 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:10:47,778 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:10:47,778 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:10:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:10:47,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:10:47,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376029874] [2025-02-08 08:10:47,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376029874] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:10:47,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:10:47,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:10:47,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482993532] [2025-02-08 08:10:47,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:10:47,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:10:47,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:10:47,805 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:10:47,805 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:10:47,818 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 59 [2025-02-08 08:10:47,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:10:47,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:10:47,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 59 [2025-02-08 08:10:47,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:10:47,970 INFO L124 PetriNetUnfolderBase]: 704/1763 cut-off events. [2025-02-08 08:10:47,970 INFO L125 PetriNetUnfolderBase]: For 211/214 co-relation queries the response was YES. [2025-02-08 08:10:47,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3362 conditions, 1763 events. 704/1763 cut-off events. For 211/214 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13350 event pairs, 514 based on Foata normal form. 0/1703 useless extension candidates. Maximal degree in co-relation 3352. Up to 1009 conditions per place. [2025-02-08 08:10:47,978 INFO L140 encePairwiseOnDemand]: 55/59 looper letters, 38 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2025-02-08 08:10:47,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 61 transitions, 280 flow [2025-02-08 08:10:47,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:10:47,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:10:47,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2025-02-08 08:10:47,980 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.576271186440678 [2025-02-08 08:10:47,980 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 186 flow. Second operand 3 states and 102 transitions. [2025-02-08 08:10:47,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 61 transitions, 280 flow [2025-02-08 08:10:47,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 61 transitions, 269 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-02-08 08:10:47,982 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 179 flow [2025-02-08 08:10:47,982 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2025-02-08 08:10:47,983 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2025-02-08 08:10:47,983 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 179 flow [2025-02-08 08:10:47,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:10:47,983 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:10:47,983 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:10:47,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-08 08:10:47,984 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2025-02-08 08:10:47,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:10:47,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1789204139, now seen corresponding path program 1 times [2025-02-08 08:10:47,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:10:47,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193818728] [2025-02-08 08:10:47,984 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:10:47,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:10:47,990 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 08:10:47,995 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:10:47,996 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:10:47,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:10:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:10:48,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:10:48,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193818728] [2025-02-08 08:10:48,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193818728] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:10:48,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:10:48,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:10:48,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693911056] [2025-02-08 08:10:48,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:10:48,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:10:48,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:10:48,094 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:10:48,095 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:10:48,138 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 59 [2025-02-08 08:10:48,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:10:48,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:10:48,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 59 [2025-02-08 08:10:48,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:10:48,333 INFO L124 PetriNetUnfolderBase]: 919/2100 cut-off events. [2025-02-08 08:10:48,333 INFO L125 PetriNetUnfolderBase]: For 303/321 co-relation queries the response was YES. [2025-02-08 08:10:48,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4212 conditions, 2100 events. 919/2100 cut-off events. For 303/321 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15420 event pairs, 172 based on Foata normal form. 0/1922 useless extension candidates. Maximal degree in co-relation 4202. Up to 654 conditions per place. [2025-02-08 08:10:48,342 INFO L140 encePairwiseOnDemand]: 46/59 looper letters, 57 selfloop transitions, 16 changer transitions 0/89 dead transitions. [2025-02-08 08:10:48,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 89 transitions, 413 flow [2025-02-08 08:10:48,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:10:48,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:10:48,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 171 transitions. [2025-02-08 08:10:48,343 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5796610169491525 [2025-02-08 08:10:48,343 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 179 flow. Second operand 5 states and 171 transitions. [2025-02-08 08:10:48,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 89 transitions, 413 flow [2025-02-08 08:10:48,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 89 transitions, 403 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:10:48,346 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 268 flow [2025-02-08 08:10:48,347 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2025-02-08 08:10:48,348 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2025-02-08 08:10:48,348 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 268 flow [2025-02-08 08:10:48,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:10:48,349 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:10:48,349 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:10:48,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-08 08:10:48,349 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2025-02-08 08:10:48,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:10:48,349 INFO L85 PathProgramCache]: Analyzing trace with hash -638327416, now seen corresponding path program 1 times [2025-02-08 08:10:48,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:10:48,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168827887] [2025-02-08 08:10:48,349 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:10:48,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:10:48,354 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 08:10:48,361 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:10:48,362 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:10:48,362 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:10:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:10:48,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:10:48,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168827887] [2025-02-08 08:10:48,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168827887] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:10:48,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:10:48,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:10:48,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049908716] [2025-02-08 08:10:48,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:10:48,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:10:48,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:10:48,573 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:10:48,573 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-02-08 08:10:48,622 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 59 [2025-02-08 08:10:48,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 268 flow. Second operand has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:10:48,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:10:48,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 59 [2025-02-08 08:10:48,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:10:48,736 INFO L124 PetriNetUnfolderBase]: 357/983 cut-off events. [2025-02-08 08:10:48,736 INFO L125 PetriNetUnfolderBase]: For 437/439 co-relation queries the response was YES. [2025-02-08 08:10:48,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2300 conditions, 983 events. 357/983 cut-off events. For 437/439 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6519 event pairs, 327 based on Foata normal form. 8/987 useless extension candidates. Maximal degree in co-relation 2287. Up to 659 conditions per place. [2025-02-08 08:10:48,740 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 47 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2025-02-08 08:10:48,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 71 transitions, 396 flow [2025-02-08 08:10:48,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:10:48,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:10:48,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2025-02-08 08:10:48,741 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.535593220338983 [2025-02-08 08:10:48,741 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 268 flow. Second operand 5 states and 158 transitions. [2025-02-08 08:10:48,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 71 transitions, 396 flow [2025-02-08 08:10:48,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 71 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:10:48,744 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 276 flow [2025-02-08 08:10:48,744 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=276, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2025-02-08 08:10:48,745 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2025-02-08 08:10:48,745 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 276 flow [2025-02-08 08:10:48,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:10:48,745 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:10:48,745 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2025-02-08 08:10:48,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-08 08:10:48,745 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2025-02-08 08:10:48,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:10:48,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1686686858, now seen corresponding path program 1 times [2025-02-08 08:10:48,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:10:48,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290714676] [2025-02-08 08:10:48,746 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:10:48,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:10:48,751 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-08 08:10:48,756 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:10:48,756 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:10:48,757 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 08:10:48,757 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-08 08:10:48,759 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-08 08:10:48,767 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:10:48,767 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:10:48,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 08:10:48,778 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-08 08:10:48,778 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-08 08:10:48,779 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 15 remaining) [2025-02-08 08:10:48,780 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (13 of 15 remaining) [2025-02-08 08:10:48,780 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX (12 of 15 remaining) [2025-02-08 08:10:48,780 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX (11 of 15 remaining) [2025-02-08 08:10:48,780 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2025-02-08 08:10:48,780 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2025-02-08 08:10:48,781 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 15 remaining) [2025-02-08 08:10:48,781 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2025-02-08 08:10:48,781 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2025-02-08 08:10:48,781 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2025-02-08 08:10:48,781 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 15 remaining) [2025-02-08 08:10:48,781 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 15 remaining) [2025-02-08 08:10:48,781 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 15 remaining) [2025-02-08 08:10:48,781 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 15 remaining) [2025-02-08 08:10:48,781 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 15 remaining) [2025-02-08 08:10:48,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-08 08:10:48,781 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:10:48,783 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-02-08 08:10:48,783 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-02-08 08:10:48,798 INFO L143 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2025-02-08 08:10:48,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 80 transitions, 204 flow [2025-02-08 08:10:48,846 INFO L124 PetriNetUnfolderBase]: 71/450 cut-off events. [2025-02-08 08:10:48,846 INFO L125 PetriNetUnfolderBase]: For 72/78 co-relation queries the response was YES. [2025-02-08 08:10:48,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 450 events. 71/450 cut-off events. For 72/78 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2748 event pairs, 1 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 276. Up to 32 conditions per place. [2025-02-08 08:10:48,847 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 80 transitions, 204 flow [2025-02-08 08:10:48,853 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 80 transitions, 204 flow [2025-02-08 08:10:48,853 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:10:48,853 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@7eb9313f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:10:48,853 INFO L334 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2025-02-08 08:10:48,854 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:10:48,854 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2025-02-08 08:10:48,854 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:10:48,854 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:10:48,854 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-08 08:10:48,854 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2025-02-08 08:10:48,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:10:48,855 INFO L85 PathProgramCache]: Analyzing trace with hash 12804870, now seen corresponding path program 1 times [2025-02-08 08:10:48,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:10:48,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515875019] [2025-02-08 08:10:48,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:10:48,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:10:48,861 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-08 08:10:48,861 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-08 08:10:48,861 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:10:48,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:10:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:10:48,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:10:48,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515875019] [2025-02-08 08:10:48,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515875019] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:10:48,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:10:48,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:10:48,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281015718] [2025-02-08 08:10:48,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:10:48,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-08 08:10:48,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:10:48,871 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-08 08:10:48,871 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-08 08:10:48,871 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 80 [2025-02-08 08:10:48,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 204 flow. Second operand has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 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) [2025-02-08 08:10:48,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:10:48,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 80 [2025-02-08 08:10:48,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:10:50,374 INFO L124 PetriNetUnfolderBase]: 17090/29578 cut-off events. [2025-02-08 08:10:50,374 INFO L125 PetriNetUnfolderBase]: For 3309/3309 co-relation queries the response was YES. [2025-02-08 08:10:50,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54961 conditions, 29578 events. 17090/29578 cut-off events. For 3309/3309 co-relation queries the response was YES. Maximal size of possible extension queue 1177. Compared 250261 event pairs, 16038 based on Foata normal form. 4347/31703 useless extension candidates. Maximal degree in co-relation 33473. Up to 23687 conditions per place. [2025-02-08 08:10:50,514 INFO L140 encePairwiseOnDemand]: 73/80 looper letters, 41 selfloop transitions, 0 changer transitions 0/71 dead transitions. [2025-02-08 08:10:50,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 268 flow [2025-02-08 08:10:50,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-08 08:10:50,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-02-08 08:10:50,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 108 transitions. [2025-02-08 08:10:50,516 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.675 [2025-02-08 08:10:50,516 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 204 flow. Second operand 2 states and 108 transitions. [2025-02-08 08:10:50,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 268 flow [2025-02-08 08:10:50,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 71 transitions, 268 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-08 08:10:50,534 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 186 flow [2025-02-08 08:10:50,534 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=186, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2025-02-08 08:10:50,535 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, -3 predicate places. [2025-02-08 08:10:50,535 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 186 flow [2025-02-08 08:10:50,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 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) [2025-02-08 08:10:50,535 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:10:50,535 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-02-08 08:10:50,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-08 08:10:50,535 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2025-02-08 08:10:50,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:10:50,536 INFO L85 PathProgramCache]: Analyzing trace with hash 396975845, now seen corresponding path program 1 times [2025-02-08 08:10:50,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:10:50,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091872251] [2025-02-08 08:10:50,536 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:10:50,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:10:50,543 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:10:50,545 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:10:50,545 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:10:50,545 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:10:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:10:50,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:10:50,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091872251] [2025-02-08 08:10:50,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091872251] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:10:50,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:10:50,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:10:50,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377579300] [2025-02-08 08:10:50,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:10:50,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:10:50,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:10:50,571 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:10:50,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:10:50,588 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 80 [2025-02-08 08:10:50,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:10:50,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:10:50,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 80 [2025-02-08 08:10:50,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:10:52,295 INFO L124 PetriNetUnfolderBase]: 19397/32434 cut-off events. [2025-02-08 08:10:52,296 INFO L125 PetriNetUnfolderBase]: For 3042/3073 co-relation queries the response was YES. [2025-02-08 08:10:52,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61046 conditions, 32434 events. 19397/32434 cut-off events. For 3042/3073 co-relation queries the response was YES. Maximal size of possible extension queue 1245. Compared 270541 event pairs, 13785 based on Foata normal form. 0/30789 useless extension candidates. Maximal degree in co-relation 61039. Up to 20551 conditions per place. [2025-02-08 08:10:52,444 INFO L140 encePairwiseOnDemand]: 76/80 looper letters, 55 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2025-02-08 08:10:52,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 83 transitions, 324 flow [2025-02-08 08:10:52,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:10:52,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:10:52,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2025-02-08 08:10:52,446 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2025-02-08 08:10:52,446 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 186 flow. Second operand 3 states and 137 transitions. [2025-02-08 08:10:52,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 83 transitions, 324 flow [2025-02-08 08:10:52,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 83 transitions, 324 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-08 08:10:52,452 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 186 flow [2025-02-08 08:10:52,452 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2025-02-08 08:10:52,452 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, -3 predicate places. [2025-02-08 08:10:52,452 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 186 flow [2025-02-08 08:10:52,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:10:52,452 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:10:52,452 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-02-08 08:10:52,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-08 08:10:52,453 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2025-02-08 08:10:52,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:10:52,453 INFO L85 PathProgramCache]: Analyzing trace with hash 396975846, now seen corresponding path program 1 times [2025-02-08 08:10:52,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:10:52,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307613176] [2025-02-08 08:10:52,453 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:10:52,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:10:52,457 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:10:52,460 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:10:52,460 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:10:52,461 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:10:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:10:52,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:10:52,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307613176] [2025-02-08 08:10:52,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307613176] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:10:52,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:10:52,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:10:52,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399066945] [2025-02-08 08:10:52,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:10:52,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:10:52,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:10:52,557 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:10:52,557 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:10:52,603 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 80 [2025-02-08 08:10:52,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:10:52,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:10:52,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 80 [2025-02-08 08:10:52,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:10:55,374 INFO L124 PetriNetUnfolderBase]: 38653/66455 cut-off events. [2025-02-08 08:10:55,375 INFO L125 PetriNetUnfolderBase]: For 8131/8131 co-relation queries the response was YES. [2025-02-08 08:10:55,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125223 conditions, 66455 events. 38653/66455 cut-off events. For 8131/8131 co-relation queries the response was YES. Maximal size of possible extension queue 2602. Compared 625087 event pairs, 31970 based on Foata normal form. 1/63583 useless extension candidates. Maximal degree in co-relation 125215. Up to 26914 conditions per place. [2025-02-08 08:10:55,846 INFO L140 encePairwiseOnDemand]: 74/80 looper letters, 84 selfloop transitions, 4 changer transitions 0/114 dead transitions. [2025-02-08 08:10:55,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 114 transitions, 496 flow [2025-02-08 08:10:55,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:10:55,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:10:55,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 202 transitions. [2025-02-08 08:10:55,848 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.63125 [2025-02-08 08:10:55,848 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 186 flow. Second operand 4 states and 202 transitions. [2025-02-08 08:10:55,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 114 transitions, 496 flow [2025-02-08 08:10:55,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 114 transitions, 488 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:10:55,921 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 208 flow [2025-02-08 08:10:55,921 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2025-02-08 08:10:55,921 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, 0 predicate places. [2025-02-08 08:10:55,922 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 208 flow [2025-02-08 08:10:55,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:10:55,922 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:10:55,922 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:10:55,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-02-08 08:10:55,922 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2025-02-08 08:10:55,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:10:55,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1532951061, now seen corresponding path program 1 times [2025-02-08 08:10:55,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:10:55,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452687852] [2025-02-08 08:10:55,923 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:10:55,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:10:55,931 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 08:10:55,935 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 08:10:55,938 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:10:55,938 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:10:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:10:56,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:10:56,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452687852] [2025-02-08 08:10:56,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452687852] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:10:56,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:10:56,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:10:56,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896951778] [2025-02-08 08:10:56,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:10:56,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:10:56,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:10:56,005 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:10:56,005 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:10:56,045 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 80 [2025-02-08 08:10:56,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:10:56,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:10:56,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 80 [2025-02-08 08:10:56,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:10:59,535 INFO L124 PetriNetUnfolderBase]: 47827/81000 cut-off events. [2025-02-08 08:10:59,536 INFO L125 PetriNetUnfolderBase]: For 6473/6473 co-relation queries the response was YES. [2025-02-08 08:10:59,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150918 conditions, 81000 events. 47827/81000 cut-off events. For 6473/6473 co-relation queries the response was YES. Maximal size of possible extension queue 3067. Compared 764142 event pairs, 34378 based on Foata normal form. 1/74194 useless extension candidates. Maximal degree in co-relation 150908. Up to 66388 conditions per place. [2025-02-08 08:11:00,136 INFO L140 encePairwiseOnDemand]: 72/80 looper letters, 58 selfloop transitions, 7 changer transitions 2/90 dead transitions. [2025-02-08 08:11:00,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 90 transitions, 387 flow [2025-02-08 08:11:00,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:11:00,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:11:00,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 167 transitions. [2025-02-08 08:11:00,138 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.521875 [2025-02-08 08:11:00,138 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 208 flow. Second operand 4 states and 167 transitions. [2025-02-08 08:11:00,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 90 transitions, 387 flow [2025-02-08 08:11:00,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 90 transitions, 385 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:11:00,145 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 252 flow [2025-02-08 08:11:00,145 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=252, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2025-02-08 08:11:00,145 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, 4 predicate places. [2025-02-08 08:11:00,146 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 252 flow [2025-02-08 08:11:00,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:11:00,146 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:11:00,146 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:11:00,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-08 08:11:00,146 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2025-02-08 08:11:00,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:11:00,147 INFO L85 PathProgramCache]: Analyzing trace with hash 276841122, now seen corresponding path program 1 times [2025-02-08 08:11:00,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:11:00,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901143186] [2025-02-08 08:11:00,147 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:11:00,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:11:00,156 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 08:11:00,160 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:11:00,160 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:11:00,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:11:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:11:00,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:11:00,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901143186] [2025-02-08 08:11:00,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901143186] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:11:00,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:11:00,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:11:00,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711286004] [2025-02-08 08:11:00,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:11:00,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:11:00,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:11:00,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:11:00,195 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:11:00,223 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 80 [2025-02-08 08:11:00,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:11:00,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:11:00,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 80 [2025-02-08 08:11:00,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:11:03,988 INFO L124 PetriNetUnfolderBase]: 42077/71514 cut-off events. [2025-02-08 08:11:03,989 INFO L125 PetriNetUnfolderBase]: For 8850/8965 co-relation queries the response was YES. [2025-02-08 08:11:04,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137944 conditions, 71514 events. 42077/71514 cut-off events. For 8850/8965 co-relation queries the response was YES. Maximal size of possible extension queue 2751. Compared 674702 event pairs, 30936 based on Foata normal form. 0/69656 useless extension candidates. Maximal degree in co-relation 137932. Up to 45526 conditions per place. [2025-02-08 08:11:04,365 INFO L140 encePairwiseOnDemand]: 76/80 looper letters, 59 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2025-02-08 08:11:04,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 87 transitions, 402 flow [2025-02-08 08:11:04,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:11:04,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:11:04,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2025-02-08 08:11:04,366 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2025-02-08 08:11:04,366 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 252 flow. Second operand 3 states and 137 transitions. [2025-02-08 08:11:04,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 87 transitions, 402 flow [2025-02-08 08:11:04,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 87 transitions, 394 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-02-08 08:11:04,386 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 248 flow [2025-02-08 08:11:04,387 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=78, PETRI_TRANSITIONS=73} [2025-02-08 08:11:04,387 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, 3 predicate places. [2025-02-08 08:11:04,387 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 248 flow [2025-02-08 08:11:04,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:11:04,387 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:11:04,387 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:11:04,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-02-08 08:11:04,388 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2025-02-08 08:11:04,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:11:04,388 INFO L85 PathProgramCache]: Analyzing trace with hash 276841123, now seen corresponding path program 1 times [2025-02-08 08:11:04,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:11:04,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805275931] [2025-02-08 08:11:04,388 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:11:04,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:11:04,394 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 08:11:04,398 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:11:04,398 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:11:04,398 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:11:04,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:11:04,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:11:04,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805275931] [2025-02-08 08:11:04,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805275931] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:11:04,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:11:04,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:11:04,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456631233] [2025-02-08 08:11:04,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:11:04,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:11:04,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:11:04,511 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:11:04,511 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:11:04,659 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 80 [2025-02-08 08:11:04,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 73 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:11:04,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:11:04,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 80 [2025-02-08 08:11:04,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:11:10,433 INFO L124 PetriNetUnfolderBase]: 61010/97678 cut-off events. [2025-02-08 08:11:10,433 INFO L125 PetriNetUnfolderBase]: For 14084/14549 co-relation queries the response was YES. [2025-02-08 08:11:10,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195573 conditions, 97678 events. 61010/97678 cut-off events. For 14084/14549 co-relation queries the response was YES. Maximal size of possible extension queue 3354. Compared 887514 event pairs, 17892 based on Foata normal form. 0/92281 useless extension candidates. Maximal degree in co-relation 195561. Up to 39978 conditions per place. [2025-02-08 08:11:11,345 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 97 selfloop transitions, 16 changer transitions 0/134 dead transitions. [2025-02-08 08:11:11,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 134 transitions, 628 flow [2025-02-08 08:11:11,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:11:11,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:11:11,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 236 transitions. [2025-02-08 08:11:11,347 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.59 [2025-02-08 08:11:11,347 INFO L175 Difference]: Start difference. First operand has 78 places, 73 transitions, 248 flow. Second operand 5 states and 236 transitions. [2025-02-08 08:11:11,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 134 transitions, 628 flow [2025-02-08 08:11:11,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 134 transitions, 618 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:11:11,716 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 343 flow [2025-02-08 08:11:11,717 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=343, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2025-02-08 08:11:11,717 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, 8 predicate places. [2025-02-08 08:11:11,717 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 343 flow [2025-02-08 08:11:11,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:11:11,717 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:11:11,717 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:11:11,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-02-08 08:11:11,718 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2025-02-08 08:11:11,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:11:11,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1428164711, now seen corresponding path program 1 times [2025-02-08 08:11:11,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:11:11,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427929054] [2025-02-08 08:11:11,718 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:11:11,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:11:11,722 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 08:11:11,726 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:11:11,726 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:11:11,726 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:11:11,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:11:11,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:11:11,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427929054] [2025-02-08 08:11:11,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427929054] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:11:11,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:11:11,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 08:11:11,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472362993] [2025-02-08 08:11:11,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:11:11,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-08 08:11:11,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:11:11,860 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-08 08:11:11,860 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-02-08 08:11:11,957 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 80 [2025-02-08 08:11:11,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 343 flow. Second operand has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:11:11,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:11:11,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 80 [2025-02-08 08:11:11,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:11:17,242 INFO L124 PetriNetUnfolderBase]: 55504/90776 cut-off events. [2025-02-08 08:11:17,242 INFO L125 PetriNetUnfolderBase]: For 22344/22344 co-relation queries the response was YES. [2025-02-08 08:11:17,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203151 conditions, 90776 events. 55504/90776 cut-off events. For 22344/22344 co-relation queries the response was YES. Maximal size of possible extension queue 3129. Compared 837140 event pairs, 38552 based on Foata normal form. 28/88217 useless extension candidates. Maximal degree in co-relation 203136. Up to 39030 conditions per place. [2025-02-08 08:11:17,815 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 144 selfloop transitions, 15 changer transitions 0/181 dead transitions. [2025-02-08 08:11:17,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 181 transitions, 1055 flow [2025-02-08 08:11:17,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:11:17,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:11:17,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 269 transitions. [2025-02-08 08:11:17,819 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6725 [2025-02-08 08:11:17,819 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 343 flow. Second operand 5 states and 269 transitions. [2025-02-08 08:11:17,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 181 transitions, 1055 flow [2025-02-08 08:11:17,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 181 transitions, 1046 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:11:17,849 INFO L231 Difference]: Finished difference. Result has 88 places, 93 transitions, 486 flow [2025-02-08 08:11:17,850 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=486, PETRI_PLACES=88, PETRI_TRANSITIONS=93} [2025-02-08 08:11:17,850 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, 13 predicate places. [2025-02-08 08:11:17,850 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 93 transitions, 486 flow [2025-02-08 08:11:17,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:11:17,850 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:11:17,851 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:11:17,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-02-08 08:11:17,851 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2025-02-08 08:11:17,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:11:17,851 INFO L85 PathProgramCache]: Analyzing trace with hash -243638775, now seen corresponding path program 1 times [2025-02-08 08:11:17,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:11:17,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897176390] [2025-02-08 08:11:17,851 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:11:17,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:11:17,856 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:11:17,858 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:11:17,858 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:11:17,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:11:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:11:17,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:11:17,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897176390] [2025-02-08 08:11:17,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897176390] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:11:17,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:11:17,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:11:17,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139901553] [2025-02-08 08:11:17,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:11:17,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:11:17,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:11:17,953 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:11:17,953 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:11:17,983 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 80 [2025-02-08 08:11:17,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 93 transitions, 486 flow. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:11:17,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:11:17,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 80 [2025-02-08 08:11:17,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:11:22,124 INFO L124 PetriNetUnfolderBase]: 38745/70093 cut-off events. [2025-02-08 08:11:22,124 INFO L125 PetriNetUnfolderBase]: For 43779/44205 co-relation queries the response was YES. [2025-02-08 08:11:22,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168300 conditions, 70093 events. 38745/70093 cut-off events. For 43779/44205 co-relation queries the response was YES. Maximal size of possible extension queue 2588. Compared 704419 event pairs, 27206 based on Foata normal form. 0/69807 useless extension candidates. Maximal degree in co-relation 168283. Up to 40123 conditions per place. [2025-02-08 08:11:22,632 INFO L140 encePairwiseOnDemand]: 76/80 looper letters, 72 selfloop transitions, 6 changer transitions 2/106 dead transitions. [2025-02-08 08:11:22,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 106 transitions, 672 flow [2025-02-08 08:11:22,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:11:22,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:11:22,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 172 transitions. [2025-02-08 08:11:22,634 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5375 [2025-02-08 08:11:22,634 INFO L175 Difference]: Start difference. First operand has 88 places, 93 transitions, 486 flow. Second operand 4 states and 172 transitions. [2025-02-08 08:11:22,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 106 transitions, 672 flow [2025-02-08 08:11:22,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 106 transitions, 660 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-02-08 08:11:22,695 INFO L231 Difference]: Finished difference. Result has 88 places, 90 transitions, 469 flow [2025-02-08 08:11:22,695 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=469, PETRI_PLACES=88, PETRI_TRANSITIONS=90} [2025-02-08 08:11:22,696 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, 13 predicate places. [2025-02-08 08:11:22,696 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 90 transitions, 469 flow [2025-02-08 08:11:22,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:11:22,696 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:11:22,696 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:11:22,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-02-08 08:11:22,696 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2025-02-08 08:11:22,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:11:22,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1093041174, now seen corresponding path program 1 times [2025-02-08 08:11:22,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:11:22,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384336825] [2025-02-08 08:11:22,697 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:11:22,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:11:22,703 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:11:22,708 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:11:22,708 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:11:22,708 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:11:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:11:22,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:11:22,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384336825] [2025-02-08 08:11:22,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384336825] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:11:22,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:11:22,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:11:22,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278973331] [2025-02-08 08:11:22,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:11:22,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:11:22,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:11:22,833 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:11:22,834 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:11:22,873 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 80 [2025-02-08 08:11:22,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 90 transitions, 469 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:11:22,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:11:22,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 80 [2025-02-08 08:11:22,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand