./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-node-trans.wvr.c --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/weaver/chl-node-trans.wvr.c -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 c9008ebcceff34245d74f1892a84a552f8268a9318e8a2970f14b3ec6b594daf --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:35:09,118 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:35:09,170 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:35:09,175 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:35:09,178 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:35:09,201 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:35:09,202 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:35:09,202 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:35:09,203 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:35:09,203 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:35:09,203 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:35:09,203 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:35:09,204 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:35:09,204 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:35:09,204 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:35:09,204 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:35:09,204 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:35:09,204 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:35:09,204 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:35:09,205 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:35:09,205 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:35:09,205 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:35:09,205 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:35:09,205 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:35:09,205 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:35:09,205 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:35:09,205 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:35:09,205 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:35:09,205 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:35:09,206 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:35:09,206 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:35:09,206 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:35:09,206 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:35:09,206 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:35:09,206 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:35:09,207 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:35:09,207 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:35:09,207 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:35:09,207 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:35:09,207 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:35:09,207 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:35:09,207 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:35:09,207 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 -> c9008ebcceff34245d74f1892a84a552f8268a9318e8a2970f14b3ec6b594daf [2025-02-08 08:35:09,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:35:09,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:35:09,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:35:09,462 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:35:09,462 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:35:09,463 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2025-02-08 08:35:10,644 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2c90e126e/edb9a3042cdc4974b28287c5cb5d3e7b/FLAGf796382f2 [2025-02-08 08:35:10,889 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:35:10,890 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2025-02-08 08:35:10,911 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2c90e126e/edb9a3042cdc4974b28287c5cb5d3e7b/FLAGf796382f2 [2025-02-08 08:35:11,228 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2c90e126e/edb9a3042cdc4974b28287c5cb5d3e7b [2025-02-08 08:35:11,235 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:35:11,239 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:35:11,242 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:35:11,242 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:35:11,245 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:35:11,250 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:35:11" (1/1) ... [2025-02-08 08:35:11,251 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34dbd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:11, skipping insertion in model container [2025-02-08 08:35:11,254 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:35:11" (1/1) ... [2025-02-08 08:35:11,274 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:35:11,519 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-08 08:35:11,532 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-08 08:35:11,536 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:35:11,564 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:35:11,608 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:35:11,620 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:35:11,620 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:11 WrapperNode [2025-02-08 08:35:11,620 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:35:11,622 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:35:11,622 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:35:11,622 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:35:11,626 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:11" (1/1) ... [2025-02-08 08:35:11,635 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:11" (1/1) ... [2025-02-08 08:35:11,662 INFO L138 Inliner]: procedures = 26, calls = 52, calls flagged for inlining = 23, calls inlined = 35, statements flattened = 408 [2025-02-08 08:35:11,663 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:35:11,663 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:35:11,664 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:35:11,664 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:35:11,670 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:11" (1/1) ... [2025-02-08 08:35:11,670 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:11" (1/1) ... [2025-02-08 08:35:11,674 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:11" (1/1) ... [2025-02-08 08:35:11,696 INFO L175 MemorySlicer]: Split 26 memory accesses to 3 slices as follows [2, 15, 9]. 58 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 6 writes are split as follows [0, 3, 3]. [2025-02-08 08:35:11,699 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:11" (1/1) ... [2025-02-08 08:35:11,700 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:11" (1/1) ... [2025-02-08 08:35:11,711 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:11" (1/1) ... [2025-02-08 08:35:11,715 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:11" (1/1) ... [2025-02-08 08:35:11,716 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:11" (1/1) ... [2025-02-08 08:35:11,717 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:11" (1/1) ... [2025-02-08 08:35:11,719 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:35:11,721 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:35:11,723 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:35:11,723 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:35:11,724 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:11" (1/1) ... [2025-02-08 08:35:11,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:35:11,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:11,756 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 08:35:11,758 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 08:35:11,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:35:11,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 08:35:11,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 08:35:11,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-08 08:35:11,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 08:35:11,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 08:35:11,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-08 08:35:11,788 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 08:35:11,788 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 08:35:11,788 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 08:35:11,788 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 08:35:11,788 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-08 08:35:11,788 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-08 08:35:11,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:35:11,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 08:35:11,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-08 08:35:11,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 08:35:11,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:35:11,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:35:11,790 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 08:35:11,953 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:35:11,954 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:35:12,183 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L52-8: #t~ite9#1 := #t~ret8#1; [2025-02-08 08:35:12,183 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L52-9: assume { :end_inline_minus } true;assume -2147483648 <= #t~ret8#1 && #t~ret8#1 <= 2147483647; [2025-02-08 08:35:12,183 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L52-10: havoc minus_#in~a#1, minus_#in~b#1; [2025-02-08 08:35:12,184 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L52-11: havoc minus_~a#1, minus_~b#1; [2025-02-08 08:35:12,184 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L52-12: #t~ret8#1 := minus_#res#1; [2025-02-08 08:35:12,256 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L60-8: #t~ite18#1 := #t~ret17#1; [2025-02-08 08:35:12,256 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L60-9: assume { :end_inline_minus } true;assume -2147483648 <= #t~ret17#1 && #t~ret17#1 <= 2147483647; [2025-02-08 08:35:12,256 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L60-10: havoc minus_#in~a#1, minus_#in~b#1; [2025-02-08 08:35:12,256 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L60-11: havoc minus_~a#1, minus_~b#1; [2025-02-08 08:35:12,257 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L60-12: #t~ret17#1 := minus_#res#1; [2025-02-08 08:35:12,313 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L68-8: #t~ite27#1 := #t~ret26#1; [2025-02-08 08:35:12,313 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L68-9: assume { :end_inline_minus } true;assume -2147483648 <= #t~ret26#1 && #t~ret26#1 <= 2147483647; [2025-02-08 08:35:12,313 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L68-10: havoc minus_#in~a#1, minus_#in~b#1; [2025-02-08 08:35:12,313 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L68-11: havoc minus_~a#1, minus_~b#1; [2025-02-08 08:35:12,314 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L68-12: #t~ret26#1 := minus_#res#1; [2025-02-08 08:35:12,578 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:35:12,578 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:35:12,930 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:35:12,930 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:35:12,930 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:35:12 BoogieIcfgContainer [2025-02-08 08:35:12,930 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:35:12,931 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:35:12,931 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:35:12,935 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:35:12,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:35:11" (1/3) ... [2025-02-08 08:35:12,939 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6019b3f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:35:12, skipping insertion in model container [2025-02-08 08:35:12,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:35:11" (2/3) ... [2025-02-08 08:35:12,939 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6019b3f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:35:12, skipping insertion in model container [2025-02-08 08:35:12,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:35:12" (3/3) ... [2025-02-08 08:35:12,940 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-node-trans.wvr.c [2025-02-08 08:35:12,963 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:35:12,964 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-node-trans.wvr.c that has 4 procedures, 109 locations, 1 initial locations, 6 loop locations, and 50 error locations. [2025-02-08 08:35:12,968 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:35:13,077 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-08 08:35:13,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 117 transitions, 255 flow [2025-02-08 08:35:13,147 INFO L124 PetriNetUnfolderBase]: 9/114 cut-off events. [2025-02-08 08:35:13,150 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-08 08:35:13,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 114 events. 9/114 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 383 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2025-02-08 08:35:13,155 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 117 transitions, 255 flow [2025-02-08 08:35:13,158 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 113 transitions, 244 flow [2025-02-08 08:35:13,163 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:35:13,174 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;@385bab6c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:35:13,174 INFO L334 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2025-02-08 08:35:13,179 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:35:13,181 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-08 08:35:13,181 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:35:13,181 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:13,182 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:35:13,182 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:13,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:13,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1204015, now seen corresponding path program 1 times [2025-02-08 08:35:13,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:13,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587931494] [2025-02-08 08:35:13,190 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:13,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:13,286 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:35:13,315 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:35:13,315 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:13,315 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:13,464 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 08:35:13,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:13,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587931494] [2025-02-08 08:35:13,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587931494] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:35:13,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:35:13,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:35:13,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596715762] [2025-02-08 08:35:13,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:13,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:35:13,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:13,490 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:35:13,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:35:13,551 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 117 [2025-02-08 08:35:13,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 113 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 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 08:35:13,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:13,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 117 [2025-02-08 08:35:13,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:14,185 INFO L124 PetriNetUnfolderBase]: 1900/4842 cut-off events. [2025-02-08 08:35:14,185 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2025-02-08 08:35:14,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7627 conditions, 4842 events. 1900/4842 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 44396 event pairs, 1384 based on Foata normal form. 1/3624 useless extension candidates. Maximal degree in co-relation 7133. Up to 2629 conditions per place. [2025-02-08 08:35:14,221 INFO L140 encePairwiseOnDemand]: 111/117 looper letters, 45 selfloop transitions, 2 changer transitions 0/108 dead transitions. [2025-02-08 08:35:14,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 108 transitions, 328 flow [2025-02-08 08:35:14,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:35:14,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:35:14,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 246 transitions. [2025-02-08 08:35:14,230 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7008547008547008 [2025-02-08 08:35:14,231 INFO L175 Difference]: Start difference. First operand has 114 places, 113 transitions, 244 flow. Second operand 3 states and 246 transitions. [2025-02-08 08:35:14,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 108 transitions, 328 flow [2025-02-08 08:35:14,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 108 transitions, 316 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-08 08:35:14,239 INFO L231 Difference]: Finished difference. Result has 105 places, 108 transitions, 226 flow [2025-02-08 08:35:14,240 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=105, PETRI_TRANSITIONS=108} [2025-02-08 08:35:14,243 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -9 predicate places. [2025-02-08 08:35:14,243 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 108 transitions, 226 flow [2025-02-08 08:35:14,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 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 08:35:14,243 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:14,243 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:35:14,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:35:14,244 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:14,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:14,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1204016, now seen corresponding path program 1 times [2025-02-08 08:35:14,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:14,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552314386] [2025-02-08 08:35:14,244 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:14,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:14,252 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:35:14,265 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:35:14,266 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:14,266 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:14,511 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 08:35:14,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:14,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552314386] [2025-02-08 08:35:14,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552314386] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:35:14,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:35:14,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:35:14,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579254141] [2025-02-08 08:35:14,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:14,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:35:14,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:14,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:35:14,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:35:14,589 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 117 [2025-02-08 08:35:14,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 108 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 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 08:35:14,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:14,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 117 [2025-02-08 08:35:14,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:15,057 INFO L124 PetriNetUnfolderBase]: 1901/4845 cut-off events. [2025-02-08 08:35:15,058 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2025-02-08 08:35:15,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7540 conditions, 4845 events. 1901/4845 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 44477 event pairs, 1384 based on Foata normal form. 0/3623 useless extension candidates. Maximal degree in co-relation 7503. Up to 2642 conditions per place. [2025-02-08 08:35:15,078 INFO L140 encePairwiseOnDemand]: 113/117 looper letters, 50 selfloop transitions, 3 changer transitions 0/111 dead transitions. [2025-02-08 08:35:15,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 111 transitions, 338 flow [2025-02-08 08:35:15,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:35:15,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:35:15,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2025-02-08 08:35:15,080 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7094017094017094 [2025-02-08 08:35:15,080 INFO L175 Difference]: Start difference. First operand has 105 places, 108 transitions, 226 flow. Second operand 3 states and 249 transitions. [2025-02-08 08:35:15,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 111 transitions, 338 flow [2025-02-08 08:35:15,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 111 transitions, 334 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:35:15,082 INFO L231 Difference]: Finished difference. Result has 106 places, 110 transitions, 241 flow [2025-02-08 08:35:15,083 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=106, PETRI_TRANSITIONS=110} [2025-02-08 08:35:15,083 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -8 predicate places. [2025-02-08 08:35:15,083 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 110 transitions, 241 flow [2025-02-08 08:35:15,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 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 08:35:15,083 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:15,084 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-08 08:35:15,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:35:15,084 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:15,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:15,084 INFO L85 PathProgramCache]: Analyzing trace with hash 37327216, now seen corresponding path program 1 times [2025-02-08 08:35:15,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:15,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145747566] [2025-02-08 08:35:15,085 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:15,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:15,091 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-08 08:35:15,096 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-08 08:35:15,096 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:15,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:15,151 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 08:35:15,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:15,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145747566] [2025-02-08 08:35:15,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145747566] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:35:15,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:35:15,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:35:15,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202103740] [2025-02-08 08:35:15,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:15,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:35:15,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:15,152 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:35:15,152 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:35:15,160 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 117 [2025-02-08 08:35:15,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 110 transitions, 241 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 08:35:15,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:15,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 117 [2025-02-08 08:35:15,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:15,504 INFO L124 PetriNetUnfolderBase]: 1900/4844 cut-off events. [2025-02-08 08:35:15,504 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2025-02-08 08:35:15,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7540 conditions, 4844 events. 1900/4844 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 44472 event pairs, 1384 based on Foata normal form. 1/3627 useless extension candidates. Maximal degree in co-relation 7527. Up to 2638 conditions per place. [2025-02-08 08:35:15,529 INFO L140 encePairwiseOnDemand]: 114/117 looper letters, 47 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2025-02-08 08:35:15,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 110 transitions, 336 flow [2025-02-08 08:35:15,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:35:15,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:35:15,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2025-02-08 08:35:15,533 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7236467236467237 [2025-02-08 08:35:15,533 INFO L175 Difference]: Start difference. First operand has 106 places, 110 transitions, 241 flow. Second operand 3 states and 254 transitions. [2025-02-08 08:35:15,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 110 transitions, 336 flow [2025-02-08 08:35:15,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 110 transitions, 334 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:35:15,535 INFO L231 Difference]: Finished difference. Result has 107 places, 109 transitions, 238 flow [2025-02-08 08:35:15,535 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=107, PETRI_TRANSITIONS=109} [2025-02-08 08:35:15,537 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -7 predicate places. [2025-02-08 08:35:15,537 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 109 transitions, 238 flow [2025-02-08 08:35:15,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 08:35:15,537 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:15,537 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-08 08:35:15,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 08:35:15,537 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:15,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:15,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1157096738, now seen corresponding path program 1 times [2025-02-08 08:35:15,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:15,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275673073] [2025-02-08 08:35:15,538 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:15,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:15,545 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:35:15,553 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:35:15,553 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:15,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:15,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:15,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275673073] [2025-02-08 08:35:15,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275673073] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:15,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552357207] [2025-02-08 08:35:15,764 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:15,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:15,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:15,769 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:35:15,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-08 08:35:15,825 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:35:15,838 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:35:15,838 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:15,838 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:15,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:35:15,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:15,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-08 08:35:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:16,024 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:35:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:35:16,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552357207] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:35:16,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:35:16,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-08 08:35:16,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610571252] [2025-02-08 08:35:16,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:35:16,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:35:16,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:16,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:35:16,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:35:16,604 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 117 [2025-02-08 08:35:16,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 109 transitions, 238 flow. Second operand has 11 states, 11 states have (on average 66.36363636363636) internal successors, (730), 11 states have internal predecessors, (730), 0 states have call successors, (0), 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 08:35:16,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:16,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 117 [2025-02-08 08:35:16,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:17,241 INFO L124 PetriNetUnfolderBase]: 1900/4843 cut-off events. [2025-02-08 08:35:17,242 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2025-02-08 08:35:17,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7541 conditions, 4843 events. 1900/4843 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 44469 event pairs, 1384 based on Foata normal form. 0/3623 useless extension candidates. Maximal degree in co-relation 7527. Up to 2637 conditions per place. [2025-02-08 08:35:17,262 INFO L140 encePairwiseOnDemand]: 112/117 looper letters, 46 selfloop transitions, 5 changer transitions 0/109 dead transitions. [2025-02-08 08:35:17,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 109 transitions, 338 flow [2025-02-08 08:35:17,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:35:17,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:35:17,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 377 transitions. [2025-02-08 08:35:17,264 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2025-02-08 08:35:17,264 INFO L175 Difference]: Start difference. First operand has 107 places, 109 transitions, 238 flow. Second operand 5 states and 377 transitions. [2025-02-08 08:35:17,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 109 transitions, 338 flow [2025-02-08 08:35:17,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 109 transitions, 334 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:35:17,266 INFO L231 Difference]: Finished difference. Result has 109 places, 109 transitions, 248 flow [2025-02-08 08:35:17,266 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=109, PETRI_TRANSITIONS=109} [2025-02-08 08:35:17,266 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -5 predicate places. [2025-02-08 08:35:17,266 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 109 transitions, 248 flow [2025-02-08 08:35:17,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 66.36363636363636) internal successors, (730), 11 states have internal predecessors, (730), 0 states have call successors, (0), 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 08:35:17,267 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:17,267 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-08 08:35:17,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-08 08:35:17,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:17,468 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:17,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:17,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1510263230, now seen corresponding path program 1 times [2025-02-08 08:35:17,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:17,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461923233] [2025-02-08 08:35:17,468 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:17,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:17,475 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:35:17,483 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:35:17,483 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:17,483 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:35:17,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:17,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461923233] [2025-02-08 08:35:17,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461923233] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:35:17,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:35:17,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:35:17,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625612381] [2025-02-08 08:35:17,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:17,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:35:17,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:17,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:35:17,604 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:35:17,718 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 117 [2025-02-08 08:35:17,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 109 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 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 08:35:17,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:17,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 117 [2025-02-08 08:35:17,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:18,096 INFO L124 PetriNetUnfolderBase]: 1901/4846 cut-off events. [2025-02-08 08:35:18,096 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2025-02-08 08:35:18,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7554 conditions, 4846 events. 1901/4846 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 44446 event pairs, 1384 based on Foata normal form. 0/3625 useless extension candidates. Maximal degree in co-relation 7525. Up to 2640 conditions per place. [2025-02-08 08:35:18,112 INFO L140 encePairwiseOnDemand]: 111/117 looper letters, 49 selfloop transitions, 5 changer transitions 0/112 dead transitions. [2025-02-08 08:35:18,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 112 transitions, 362 flow [2025-02-08 08:35:18,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:35:18,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:35:18,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 315 transitions. [2025-02-08 08:35:18,113 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6730769230769231 [2025-02-08 08:35:18,113 INFO L175 Difference]: Start difference. First operand has 109 places, 109 transitions, 248 flow. Second operand 4 states and 315 transitions. [2025-02-08 08:35:18,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 112 transitions, 362 flow [2025-02-08 08:35:18,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 112 transitions, 352 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-02-08 08:35:18,115 INFO L231 Difference]: Finished difference. Result has 110 places, 111 transitions, 263 flow [2025-02-08 08:35:18,115 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=263, PETRI_PLACES=110, PETRI_TRANSITIONS=111} [2025-02-08 08:35:18,116 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -4 predicate places. [2025-02-08 08:35:18,116 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 111 transitions, 263 flow [2025-02-08 08:35:18,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 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 08:35:18,116 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:18,116 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:18,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-08 08:35:18,117 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:18,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:18,117 INFO L85 PathProgramCache]: Analyzing trace with hash -426475654, now seen corresponding path program 1 times [2025-02-08 08:35:18,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:18,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539854948] [2025-02-08 08:35:18,117 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:18,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:18,123 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-08 08:35:18,128 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-08 08:35:18,128 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:18,128 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:35:18,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:18,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539854948] [2025-02-08 08:35:18,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539854948] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:35:18,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:35:18,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:35:18,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84789710] [2025-02-08 08:35:18,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:18,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:35:18,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:18,166 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:35:18,166 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:35:18,181 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 117 [2025-02-08 08:35:18,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 111 transitions, 263 flow. Second operand has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 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 08:35:18,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:18,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 117 [2025-02-08 08:35:18,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:18,466 INFO L124 PetriNetUnfolderBase]: 1900/4845 cut-off events. [2025-02-08 08:35:18,466 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2025-02-08 08:35:18,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7554 conditions, 4845 events. 1900/4845 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 44399 event pairs, 1384 based on Foata normal form. 1/3629 useless extension candidates. Maximal degree in co-relation 7526. Up to 2637 conditions per place. [2025-02-08 08:35:18,490 INFO L140 encePairwiseOnDemand]: 112/117 looper letters, 47 selfloop transitions, 4 changer transitions 0/111 dead transitions. [2025-02-08 08:35:18,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 111 transitions, 362 flow [2025-02-08 08:35:18,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:35:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:35:18,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 324 transitions. [2025-02-08 08:35:18,491 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6923076923076923 [2025-02-08 08:35:18,491 INFO L175 Difference]: Start difference. First operand has 110 places, 111 transitions, 263 flow. Second operand 4 states and 324 transitions. [2025-02-08 08:35:18,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 111 transitions, 362 flow [2025-02-08 08:35:18,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 111 transitions, 358 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:35:18,493 INFO L231 Difference]: Finished difference. Result has 111 places, 110 transitions, 262 flow [2025-02-08 08:35:18,493 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=111, PETRI_TRANSITIONS=110} [2025-02-08 08:35:18,494 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -3 predicate places. [2025-02-08 08:35:18,494 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 110 transitions, 262 flow [2025-02-08 08:35:18,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 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 08:35:18,494 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:18,494 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:18,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-08 08:35:18,494 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:18,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:18,495 INFO L85 PathProgramCache]: Analyzing trace with hash -335945446, now seen corresponding path program 1 times [2025-02-08 08:35:18,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:18,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755405409] [2025-02-08 08:35:18,495 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:18,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:18,500 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 08:35:18,507 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 08:35:18,507 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:18,507 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:35:18,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:18,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755405409] [2025-02-08 08:35:18,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755405409] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:18,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10941501] [2025-02-08 08:35:18,681 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:18,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:18,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:18,687 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:35:18,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-08 08:35:18,735 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 08:35:18,754 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 08:35:18,754 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:18,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:18,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-08 08:35:18,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:18,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-08 08:35:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:35:18,855 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:35:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:35:18,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10941501] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:35:18,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:35:18,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-08 08:35:18,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233601546] [2025-02-08 08:35:18,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:35:18,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:35:18,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:18,963 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:35:18,963 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:35:19,615 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 117 [2025-02-08 08:35:19,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 110 transitions, 262 flow. Second operand has 13 states, 13 states have (on average 66.61538461538461) internal successors, (866), 13 states have internal predecessors, (866), 0 states have call successors, (0), 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 08:35:19,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:19,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 117 [2025-02-08 08:35:19,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:20,446 INFO L124 PetriNetUnfolderBase]: 1900/4844 cut-off events. [2025-02-08 08:35:20,446 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2025-02-08 08:35:20,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7555 conditions, 4844 events. 1900/4844 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 44406 event pairs, 1384 based on Foata normal form. 0/3626 useless extension candidates. Maximal degree in co-relation 7525. Up to 2632 conditions per place. [2025-02-08 08:35:20,489 INFO L140 encePairwiseOnDemand]: 109/117 looper letters, 42 selfloop transitions, 10 changer transitions 0/110 dead transitions. [2025-02-08 08:35:20,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 110 transitions, 364 flow [2025-02-08 08:35:20,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:35:20,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:35:20,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 508 transitions. [2025-02-08 08:35:20,495 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6202686202686203 [2025-02-08 08:35:20,495 INFO L175 Difference]: Start difference. First operand has 111 places, 110 transitions, 262 flow. Second operand 7 states and 508 transitions. [2025-02-08 08:35:20,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 110 transitions, 364 flow [2025-02-08 08:35:20,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 110 transitions, 356 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:35:20,498 INFO L231 Difference]: Finished difference. Result has 113 places, 110 transitions, 272 flow [2025-02-08 08:35:20,498 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=272, PETRI_PLACES=113, PETRI_TRANSITIONS=110} [2025-02-08 08:35:20,501 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -1 predicate places. [2025-02-08 08:35:20,501 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 110 transitions, 272 flow [2025-02-08 08:35:20,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 66.61538461538461) internal successors, (866), 13 states have internal predecessors, (866), 0 states have call successors, (0), 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 08:35:20,501 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:20,501 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:20,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-08 08:35:20,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:20,702 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:20,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:20,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1824369762, now seen corresponding path program 1 times [2025-02-08 08:35:20,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:20,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947366403] [2025-02-08 08:35:20,703 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:20,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:20,717 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 08:35:20,730 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:35:20,731 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:20,731 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:35:20,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:20,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947366403] [2025-02-08 08:35:20,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947366403] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:35:20,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:35:20,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:35:20,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814921836] [2025-02-08 08:35:20,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:20,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:35:20,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:20,975 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:35:20,975 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:35:21,058 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 117 [2025-02-08 08:35:21,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 110 transitions, 272 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 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 08:35:21,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:21,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 117 [2025-02-08 08:35:21,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:21,344 INFO L124 PetriNetUnfolderBase]: 1900/4846 cut-off events. [2025-02-08 08:35:21,344 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2025-02-08 08:35:21,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7565 conditions, 4846 events. 1900/4846 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 44412 event pairs, 1384 based on Foata normal form. 0/3628 useless extension candidates. Maximal degree in co-relation 7533. Up to 2640 conditions per place. [2025-02-08 08:35:21,371 INFO L140 encePairwiseOnDemand]: 111/117 looper letters, 50 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2025-02-08 08:35:21,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 112 transitions, 384 flow [2025-02-08 08:35:21,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:35:21,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:35:21,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 314 transitions. [2025-02-08 08:35:21,373 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6709401709401709 [2025-02-08 08:35:21,373 INFO L175 Difference]: Start difference. First operand has 113 places, 110 transitions, 272 flow. Second operand 4 states and 314 transitions. [2025-02-08 08:35:21,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 112 transitions, 384 flow [2025-02-08 08:35:21,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 112 transitions, 371 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-02-08 08:35:21,377 INFO L231 Difference]: Finished difference. Result has 114 places, 111 transitions, 279 flow [2025-02-08 08:35:21,377 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=279, PETRI_PLACES=114, PETRI_TRANSITIONS=111} [2025-02-08 08:35:21,379 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 0 predicate places. [2025-02-08 08:35:21,379 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 111 transitions, 279 flow [2025-02-08 08:35:21,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 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 08:35:21,380 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:21,380 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:21,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-08 08:35:21,380 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:21,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:21,380 INFO L85 PathProgramCache]: Analyzing trace with hash -872645694, now seen corresponding path program 1 times [2025-02-08 08:35:21,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:21,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262078128] [2025-02-08 08:35:21,381 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:21,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:21,389 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:35:21,404 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:35:21,404 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:21,404 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:35:21,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:21,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262078128] [2025-02-08 08:35:21,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262078128] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:21,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017534214] [2025-02-08 08:35:21,597 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:21,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:21,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:21,599 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:35:21,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-08 08:35:21,648 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:35:21,673 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:35:21,673 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:21,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:21,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:35:21,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:21,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-02-08 08:35:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:35:21,790 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:35:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:35:21,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017534214] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:35:21,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:35:21,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-08 08:35:21,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434041078] [2025-02-08 08:35:21,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:35:21,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:35:21,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:21,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:35:21,928 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:35:22,703 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 117 [2025-02-08 08:35:22,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 111 transitions, 279 flow. Second operand has 13 states, 13 states have (on average 67.07692307692308) internal successors, (872), 13 states have internal predecessors, (872), 0 states have call successors, (0), 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 08:35:22,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:22,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 117 [2025-02-08 08:35:22,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:23,172 INFO L124 PetriNetUnfolderBase]: 1900/4845 cut-off events. [2025-02-08 08:35:23,172 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2025-02-08 08:35:23,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7565 conditions, 4845 events. 1900/4845 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 44414 event pairs, 1384 based on Foata normal form. 0/3628 useless extension candidates. Maximal degree in co-relation 7533. Up to 2633 conditions per place. [2025-02-08 08:35:23,186 INFO L140 encePairwiseOnDemand]: 108/117 looper letters, 42 selfloop transitions, 11 changer transitions 0/111 dead transitions. [2025-02-08 08:35:23,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 111 transitions, 383 flow [2025-02-08 08:35:23,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:35:23,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:35:23,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 507 transitions. [2025-02-08 08:35:23,188 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2025-02-08 08:35:23,188 INFO L175 Difference]: Start difference. First operand has 114 places, 111 transitions, 279 flow. Second operand 7 states and 507 transitions. [2025-02-08 08:35:23,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 111 transitions, 383 flow [2025-02-08 08:35:23,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 111 transitions, 379 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:35:23,189 INFO L231 Difference]: Finished difference. Result has 117 places, 111 transitions, 295 flow [2025-02-08 08:35:23,190 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=295, PETRI_PLACES=117, PETRI_TRANSITIONS=111} [2025-02-08 08:35:23,190 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 3 predicate places. [2025-02-08 08:35:23,190 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 111 transitions, 295 flow [2025-02-08 08:35:23,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 67.07692307692308) internal successors, (872), 13 states have internal predecessors, (872), 0 states have call successors, (0), 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 08:35:23,191 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:23,191 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:23,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-08 08:35:23,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:23,392 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:23,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:23,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1282210288, now seen corresponding path program 1 times [2025-02-08 08:35:23,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:23,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896247945] [2025-02-08 08:35:23,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:23,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:23,402 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:35:23,416 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:35:23,416 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:23,416 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:35:23,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:23,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896247945] [2025-02-08 08:35:23,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896247945] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:23,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62324227] [2025-02-08 08:35:23,660 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:23,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:23,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:23,665 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:35:23,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-08 08:35:23,717 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:35:23,736 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:35:23,736 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:23,736 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:23,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-08 08:35:23,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:23,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-08 08:35:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:35:23,824 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:35:23,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62324227] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:35:23,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:35:23,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2025-02-08 08:35:23,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441439792] [2025-02-08 08:35:23,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:23,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:35:23,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:23,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:35:23,825 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:35:23,928 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 117 [2025-02-08 08:35:23,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 111 transitions, 295 flow. Second operand has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 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 08:35:23,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:23,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 117 [2025-02-08 08:35:23,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:24,188 INFO L124 PetriNetUnfolderBase]: 1901/4849 cut-off events. [2025-02-08 08:35:24,189 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2025-02-08 08:35:24,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7584 conditions, 4849 events. 1901/4849 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 44429 event pairs, 1384 based on Foata normal form. 0/3631 useless extension candidates. Maximal degree in co-relation 7548. Up to 2647 conditions per place. [2025-02-08 08:35:24,211 INFO L140 encePairwiseOnDemand]: 112/117 looper letters, 55 selfloop transitions, 4 changer transitions 0/114 dead transitions. [2025-02-08 08:35:24,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 114 transitions, 419 flow [2025-02-08 08:35:24,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:35:24,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:35:24,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 314 transitions. [2025-02-08 08:35:24,213 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6709401709401709 [2025-02-08 08:35:24,213 INFO L175 Difference]: Start difference. First operand has 117 places, 111 transitions, 295 flow. Second operand 4 states and 314 transitions. [2025-02-08 08:35:24,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 114 transitions, 419 flow [2025-02-08 08:35:24,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 114 transitions, 403 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-02-08 08:35:24,215 INFO L231 Difference]: Finished difference. Result has 117 places, 113 transitions, 300 flow [2025-02-08 08:35:24,215 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=300, PETRI_PLACES=117, PETRI_TRANSITIONS=113} [2025-02-08 08:35:24,216 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 3 predicate places. [2025-02-08 08:35:24,216 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 113 transitions, 300 flow [2025-02-08 08:35:24,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 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 08:35:24,216 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:24,216 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:24,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-08 08:35:24,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-02-08 08:35:24,417 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:24,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:24,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1282210289, now seen corresponding path program 1 times [2025-02-08 08:35:24,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:24,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122740146] [2025-02-08 08:35:24,421 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:24,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:24,428 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:35:24,436 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:35:24,436 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:24,436 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:24,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:35:24,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:24,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122740146] [2025-02-08 08:35:24,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122740146] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:35:24,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:35:24,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:35:24,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964813696] [2025-02-08 08:35:24,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:24,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:35:24,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:24,512 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:35:24,512 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:35:24,545 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 117 [2025-02-08 08:35:24,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 113 transitions, 300 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 08:35:24,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:24,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 117 [2025-02-08 08:35:24,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:24,776 INFO L124 PetriNetUnfolderBase]: 1901/4845 cut-off events. [2025-02-08 08:35:24,777 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2025-02-08 08:35:24,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7578 conditions, 4845 events. 1901/4845 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 44427 event pairs, 1384 based on Foata normal form. 2/3633 useless extension candidates. Maximal degree in co-relation 7544. Up to 2635 conditions per place. [2025-02-08 08:35:24,796 INFO L140 encePairwiseOnDemand]: 112/117 looper letters, 53 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2025-02-08 08:35:24,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 110 transitions, 404 flow [2025-02-08 08:35:24,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:35:24,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:35:24,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2025-02-08 08:35:24,798 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.698005698005698 [2025-02-08 08:35:24,798 INFO L175 Difference]: Start difference. First operand has 117 places, 113 transitions, 300 flow. Second operand 3 states and 245 transitions. [2025-02-08 08:35:24,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 110 transitions, 404 flow [2025-02-08 08:35:24,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 110 transitions, 399 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:35:24,800 INFO L231 Difference]: Finished difference. Result has 114 places, 110 transitions, 293 flow [2025-02-08 08:35:24,800 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=114, PETRI_TRANSITIONS=110} [2025-02-08 08:35:24,800 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 0 predicate places. [2025-02-08 08:35:24,800 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 110 transitions, 293 flow [2025-02-08 08:35:24,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 08:35:24,801 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:24,801 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:24,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-02-08 08:35:24,801 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:24,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:24,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1093811109, now seen corresponding path program 1 times [2025-02-08 08:35:24,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:24,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26697799] [2025-02-08 08:35:24,801 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:24,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:24,808 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 08:35:24,813 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:35:24,813 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:24,813 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:35:24,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:24,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26697799] [2025-02-08 08:35:24,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26697799] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:24,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797581195] [2025-02-08 08:35:24,905 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:24,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:24,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:24,907 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:35:24,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-08 08:35:24,960 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 08:35:24,979 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:35:24,979 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:24,979 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:24,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-08 08:35:24,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:35:25,000 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:35:25,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797581195] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:35:25,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:35:25,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2025-02-08 08:35:25,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470275765] [2025-02-08 08:35:25,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:25,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:35:25,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:25,002 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:35:25,002 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:35:25,024 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 117 [2025-02-08 08:35:25,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 110 transitions, 293 flow. Second operand has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 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 08:35:25,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:25,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 117 [2025-02-08 08:35:25,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:25,305 INFO L124 PetriNetUnfolderBase]: 1900/4844 cut-off events. [2025-02-08 08:35:25,305 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2025-02-08 08:35:25,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7574 conditions, 4844 events. 1900/4844 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 44417 event pairs, 1384 based on Foata normal form. 1/3632 useless extension candidates. Maximal degree in co-relation 7541. Up to 2643 conditions per place. [2025-02-08 08:35:25,325 INFO L140 encePairwiseOnDemand]: 113/117 looper letters, 52 selfloop transitions, 3 changer transitions 0/110 dead transitions. [2025-02-08 08:35:25,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 110 transitions, 401 flow [2025-02-08 08:35:25,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:35:25,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:35:25,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 322 transitions. [2025-02-08 08:35:25,327 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.688034188034188 [2025-02-08 08:35:25,327 INFO L175 Difference]: Start difference. First operand has 114 places, 110 transitions, 293 flow. Second operand 4 states and 322 transitions. [2025-02-08 08:35:25,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 110 transitions, 401 flow [2025-02-08 08:35:25,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 110 transitions, 397 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:35:25,329 INFO L231 Difference]: Finished difference. Result has 115 places, 109 transitions, 291 flow [2025-02-08 08:35:25,329 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=291, PETRI_PLACES=115, PETRI_TRANSITIONS=109} [2025-02-08 08:35:25,330 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 1 predicate places. [2025-02-08 08:35:25,330 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 109 transitions, 291 flow [2025-02-08 08:35:25,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 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 08:35:25,330 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:25,330 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:25,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-08 08:35:25,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-08 08:35:25,531 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:25,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:25,532 INFO L85 PathProgramCache]: Analyzing trace with hash 451564478, now seen corresponding path program 1 times [2025-02-08 08:35:25,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:25,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99310294] [2025-02-08 08:35:25,532 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:25,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:25,540 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:35:25,545 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:35:25,545 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:25,546 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:35:25,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:25,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99310294] [2025-02-08 08:35:25,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99310294] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:25,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495993947] [2025-02-08 08:35:25,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:25,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:25,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:25,656 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:35:25,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-08 08:35:25,709 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:35:25,727 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:35:25,727 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:25,727 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:25,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 08:35:25,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:25,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:35:25,773 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:35:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:35:25,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495993947] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:35:25,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:35:25,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-02-08 08:35:25,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943100246] [2025-02-08 08:35:25,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:35:25,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-08 08:35:25,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:25,817 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-08 08:35:25,817 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:35:25,976 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 117 [2025-02-08 08:35:25,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 109 transitions, 291 flow. Second operand has 14 states, 14 states have (on average 70.0) internal successors, (980), 14 states have internal predecessors, (980), 0 states have call successors, (0), 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 08:35:25,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:25,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 117 [2025-02-08 08:35:25,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:26,590 INFO L124 PetriNetUnfolderBase]: 3732/9388 cut-off events. [2025-02-08 08:35:26,590 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2025-02-08 08:35:26,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14750 conditions, 9388 events. 3732/9388 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 95785 event pairs, 2748 based on Foata normal form. 1/7112 useless extension candidates. Maximal degree in co-relation 7534. Up to 2635 conditions per place. [2025-02-08 08:35:26,630 INFO L140 encePairwiseOnDemand]: 105/117 looper letters, 87 selfloop transitions, 17 changer transitions 0/159 dead transitions. [2025-02-08 08:35:26,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 159 transitions, 654 flow [2025-02-08 08:35:26,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:35:26,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:35:26,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 640 transitions. [2025-02-08 08:35:26,632 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6837606837606838 [2025-02-08 08:35:26,632 INFO L175 Difference]: Start difference. First operand has 115 places, 109 transitions, 291 flow. Second operand 8 states and 640 transitions. [2025-02-08 08:35:26,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 159 transitions, 654 flow [2025-02-08 08:35:26,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 159 transitions, 644 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:35:26,634 INFO L231 Difference]: Finished difference. Result has 125 places, 123 transitions, 449 flow [2025-02-08 08:35:26,635 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=449, PETRI_PLACES=125, PETRI_TRANSITIONS=123} [2025-02-08 08:35:26,635 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 11 predicate places. [2025-02-08 08:35:26,635 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 123 transitions, 449 flow [2025-02-08 08:35:26,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.0) internal successors, (980), 14 states have internal predecessors, (980), 0 states have call successors, (0), 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 08:35:26,636 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:26,636 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:26,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-08 08:35:26,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-08 08:35:26,837 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:26,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:26,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1113599085, now seen corresponding path program 1 times [2025-02-08 08:35:26,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:26,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914111272] [2025-02-08 08:35:26,837 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:26,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:26,843 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-08 08:35:26,850 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:35:26,850 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:26,850 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:26,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:35:26,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:26,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914111272] [2025-02-08 08:35:26,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914111272] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:26,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091207292] [2025-02-08 08:35:26,976 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:26,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:26,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:26,978 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:35:26,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-08 08:35:27,036 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-08 08:35:27,057 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:35:27,057 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:27,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:27,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-08 08:35:27,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:27,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-08 08:35:27,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:35:27,113 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:35:27,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091207292] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:35:27,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:35:27,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2025-02-08 08:35:27,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762548688] [2025-02-08 08:35:27,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:27,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:35:27,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:27,114 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:35:27,114 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-02-08 08:35:27,178 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 117 [2025-02-08 08:35:27,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 123 transitions, 449 flow. Second operand has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 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 08:35:27,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:27,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 117 [2025-02-08 08:35:27,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:27,757 INFO L124 PetriNetUnfolderBase]: 3800/9688 cut-off events. [2025-02-08 08:35:27,757 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2025-02-08 08:35:27,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15190 conditions, 9688 events. 3800/9688 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 100082 event pairs, 2768 based on Foata normal form. 0/7257 useless extension candidates. Maximal degree in co-relation 7569. Up to 5292 conditions per place. [2025-02-08 08:35:27,808 INFO L140 encePairwiseOnDemand]: 112/117 looper letters, 69 selfloop transitions, 5 changer transitions 0/126 dead transitions. [2025-02-08 08:35:27,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 126 transitions, 603 flow [2025-02-08 08:35:27,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:35:27,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:35:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 314 transitions. [2025-02-08 08:35:27,810 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6709401709401709 [2025-02-08 08:35:27,810 INFO L175 Difference]: Start difference. First operand has 125 places, 123 transitions, 449 flow. Second operand 4 states and 314 transitions. [2025-02-08 08:35:27,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 126 transitions, 603 flow [2025-02-08 08:35:27,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 126 transitions, 599 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-02-08 08:35:27,812 INFO L231 Difference]: Finished difference. Result has 128 places, 125 transitions, 469 flow [2025-02-08 08:35:27,812 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=469, PETRI_PLACES=128, PETRI_TRANSITIONS=125} [2025-02-08 08:35:27,812 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 14 predicate places. [2025-02-08 08:35:27,812 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 125 transitions, 469 flow [2025-02-08 08:35:27,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 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 08:35:27,813 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:27,813 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:27,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-08 08:35:28,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:28,017 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:28,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:28,017 INFO L85 PathProgramCache]: Analyzing trace with hash -708967796, now seen corresponding path program 2 times [2025-02-08 08:35:28,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:28,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610853011] [2025-02-08 08:35:28,017 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:35:28,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:28,024 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-08 08:35:28,036 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-08 08:35:28,040 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:35:28,040 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:35:28,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:28,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610853011] [2025-02-08 08:35:28,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610853011] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:28,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214930215] [2025-02-08 08:35:28,178 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:35:28,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:28,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:28,183 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:35:28,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-08 08:35:28,244 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-02-08 08:35:28,273 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-02-08 08:35:28,273 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:35:28,273 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:28,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-08 08:35:28,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:28,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:35:28,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 36 [2025-02-08 08:35:28,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2025-02-08 08:35:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:35:28,462 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:35:28,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:35:28,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214930215] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:35:28,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:35:28,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2025-02-08 08:35:28,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354009310] [2025-02-08 08:35:28,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:35:28,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-08 08:35:28,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:28,556 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-08 08:35:28,556 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2025-02-08 08:35:29,320 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 117 [2025-02-08 08:35:29,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 125 transitions, 469 flow. Second operand has 17 states, 17 states have (on average 67.70588235294117) internal successors, (1151), 17 states have internal predecessors, (1151), 0 states have call successors, (0), 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 08:35:29,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:29,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 117 [2025-02-08 08:35:29,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:30,330 INFO L124 PetriNetUnfolderBase]: 3735/9396 cut-off events. [2025-02-08 08:35:30,330 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2025-02-08 08:35:30,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14841 conditions, 9396 events. 3735/9396 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 96119 event pairs, 2748 based on Foata normal form. 0/7121 useless extension candidates. Maximal degree in co-relation 7562. Up to 2640 conditions per place. [2025-02-08 08:35:30,369 INFO L140 encePairwiseOnDemand]: 108/117 looper letters, 99 selfloop transitions, 17 changer transitions 0/168 dead transitions. [2025-02-08 08:35:30,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 168 transitions, 821 flow [2025-02-08 08:35:30,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-08 08:35:30,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-08 08:35:30,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1081 transitions. [2025-02-08 08:35:30,372 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6159544159544159 [2025-02-08 08:35:30,372 INFO L175 Difference]: Start difference. First operand has 128 places, 125 transitions, 469 flow. Second operand 15 states and 1081 transitions. [2025-02-08 08:35:30,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 168 transitions, 821 flow [2025-02-08 08:35:30,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 168 transitions, 812 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:35:30,375 INFO L231 Difference]: Finished difference. Result has 141 places, 128 transitions, 523 flow [2025-02-08 08:35:30,375 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=523, PETRI_PLACES=141, PETRI_TRANSITIONS=128} [2025-02-08 08:35:30,375 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 27 predicate places. [2025-02-08 08:35:30,375 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 128 transitions, 523 flow [2025-02-08 08:35:30,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 67.70588235294117) internal successors, (1151), 17 states have internal predecessors, (1151), 0 states have call successors, (0), 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 08:35:30,376 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:30,376 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:30,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-08 08:35:30,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-02-08 08:35:30,576 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:30,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:30,577 INFO L85 PathProgramCache]: Analyzing trace with hash 161835286, now seen corresponding path program 1 times [2025-02-08 08:35:30,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:30,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715597469] [2025-02-08 08:35:30,577 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:30,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:30,584 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-08 08:35:30,590 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-08 08:35:30,590 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:30,590 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:35:30,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:30,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715597469] [2025-02-08 08:35:30,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715597469] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:35:30,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:35:30,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:35:30,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298025045] [2025-02-08 08:35:30,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:30,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:35:30,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:30,631 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:35:30,631 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:35:30,651 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 117 [2025-02-08 08:35:30,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 128 transitions, 523 flow. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 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 08:35:30,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:30,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 117 [2025-02-08 08:35:30,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:31,181 INFO L124 PetriNetUnfolderBase]: 3799/9688 cut-off events. [2025-02-08 08:35:31,182 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2025-02-08 08:35:31,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15226 conditions, 9688 events. 3799/9688 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 100036 event pairs, 2768 based on Foata normal form. 2/7268 useless extension candidates. Maximal degree in co-relation 7670. Up to 5287 conditions per place. [2025-02-08 08:35:31,233 INFO L140 encePairwiseOnDemand]: 113/117 looper letters, 69 selfloop transitions, 5 changer transitions 0/128 dead transitions. [2025-02-08 08:35:31,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 128 transitions, 669 flow [2025-02-08 08:35:31,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:35:31,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:35:31,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 322 transitions. [2025-02-08 08:35:31,234 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.688034188034188 [2025-02-08 08:35:31,234 INFO L175 Difference]: Start difference. First operand has 141 places, 128 transitions, 523 flow. Second operand 4 states and 322 transitions. [2025-02-08 08:35:31,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 128 transitions, 669 flow [2025-02-08 08:35:31,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 128 transitions, 618 flow, removed 11 selfloop flow, removed 11 redundant places. [2025-02-08 08:35:31,237 INFO L231 Difference]: Finished difference. Result has 133 places, 127 transitions, 478 flow [2025-02-08 08:35:31,237 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=478, PETRI_PLACES=133, PETRI_TRANSITIONS=127} [2025-02-08 08:35:31,237 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 19 predicate places. [2025-02-08 08:35:31,237 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 127 transitions, 478 flow [2025-02-08 08:35:31,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 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 08:35:31,237 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:31,237 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:31,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-02-08 08:35:31,237 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:31,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:31,238 INFO L85 PathProgramCache]: Analyzing trace with hash 721902685, now seen corresponding path program 1 times [2025-02-08 08:35:31,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:31,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767783852] [2025-02-08 08:35:31,238 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:31,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:31,244 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-08 08:35:31,249 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-08 08:35:31,249 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:31,249 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:31,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:35:31,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:31,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767783852] [2025-02-08 08:35:31,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767783852] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:31,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408131677] [2025-02-08 08:35:31,344 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:31,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:31,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:31,350 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:35:31,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-08 08:35:31,413 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-08 08:35:31,433 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-08 08:35:31,434 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:31,434 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:31,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 08:35:31,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:35:31,518 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:35:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:35:31,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408131677] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:35:31,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:35:31,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-02-08 08:35:31,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418277779] [2025-02-08 08:35:31,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:35:31,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-08 08:35:31,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:31,576 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-08 08:35:31,576 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:35:31,739 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 117 [2025-02-08 08:35:31,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 127 transitions, 478 flow. Second operand has 14 states, 14 states have (on average 70.21428571428571) internal successors, (983), 14 states have internal predecessors, (983), 0 states have call successors, (0), 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 08:35:31,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:31,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 117 [2025-02-08 08:35:31,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:32,882 INFO L124 PetriNetUnfolderBase]: 7461/18769 cut-off events. [2025-02-08 08:35:32,882 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2025-02-08 08:35:32,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29561 conditions, 18769 events. 7461/18769 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 1142. Compared 213663 event pairs, 5496 based on Foata normal form. 2/14228 useless extension candidates. Maximal degree in co-relation 14858. Up to 5258 conditions per place. [2025-02-08 08:35:32,971 INFO L140 encePairwiseOnDemand]: 104/117 looper letters, 96 selfloop transitions, 36 changer transitions 0/186 dead transitions. [2025-02-08 08:35:32,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 186 transitions, 987 flow [2025-02-08 08:35:32,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:35:32,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:35:32,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 707 transitions. [2025-02-08 08:35:32,977 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.671415004748338 [2025-02-08 08:35:32,977 INFO L175 Difference]: Start difference. First operand has 133 places, 127 transitions, 478 flow. Second operand 9 states and 707 transitions. [2025-02-08 08:35:32,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 186 transitions, 987 flow [2025-02-08 08:35:32,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 186 transitions, 969 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:35:32,980 INFO L231 Difference]: Finished difference. Result has 143 places, 145 transitions, 724 flow [2025-02-08 08:35:32,980 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=724, PETRI_PLACES=143, PETRI_TRANSITIONS=145} [2025-02-08 08:35:32,980 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 29 predicate places. [2025-02-08 08:35:32,980 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 145 transitions, 724 flow [2025-02-08 08:35:32,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.21428571428571) internal successors, (983), 14 states have internal predecessors, (983), 0 states have call successors, (0), 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 08:35:32,981 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:32,981 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:32,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-08 08:35:33,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:33,182 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:33,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:33,182 INFO L85 PathProgramCache]: Analyzing trace with hash 904148774, now seen corresponding path program 1 times [2025-02-08 08:35:33,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:33,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126676417] [2025-02-08 08:35:33,182 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:33,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:33,193 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-08 08:35:33,201 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-08 08:35:33,201 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:33,201 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:35:33,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:33,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126676417] [2025-02-08 08:35:33,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126676417] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:33,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329653434] [2025-02-08 08:35:33,363 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:33,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:33,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:33,366 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:35:33,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-08 08:35:33,433 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-08 08:35:33,462 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-08 08:35:33,463 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:33,463 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:33,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-08 08:35:33,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:33,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-08 08:35:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-08 08:35:33,532 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:35:33,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329653434] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:35:33,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:35:33,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2025-02-08 08:35:33,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349916826] [2025-02-08 08:35:33,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:33,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:35:33,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:33,533 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:35:33,533 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-02-08 08:35:33,588 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 117 [2025-02-08 08:35:33,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 145 transitions, 724 flow. Second operand has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 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 08:35:33,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:33,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 117 [2025-02-08 08:35:33,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:34,715 INFO L124 PetriNetUnfolderBase]: 7597/19369 cut-off events. [2025-02-08 08:35:34,715 INFO L125 PetriNetUnfolderBase]: For 216/216 co-relation queries the response was YES. [2025-02-08 08:35:34,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30414 conditions, 19369 events. 7597/19369 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 1151. Compared 222619 event pairs, 5536 based on Foata normal form. 0/14514 useless extension candidates. Maximal degree in co-relation 15309. Up to 10577 conditions per place. [2025-02-08 08:35:34,828 INFO L140 encePairwiseOnDemand]: 112/117 looper letters, 91 selfloop transitions, 5 changer transitions 0/148 dead transitions. [2025-02-08 08:35:34,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 148 transitions, 922 flow [2025-02-08 08:35:34,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:35:34,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:35:34,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 313 transitions. [2025-02-08 08:35:34,830 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6688034188034188 [2025-02-08 08:35:34,830 INFO L175 Difference]: Start difference. First operand has 143 places, 145 transitions, 724 flow. Second operand 4 states and 313 transitions. [2025-02-08 08:35:34,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 148 transitions, 922 flow [2025-02-08 08:35:34,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 148 transitions, 920 flow, removed 1 selfloop flow, removed 0 redundant places. [2025-02-08 08:35:34,835 INFO L231 Difference]: Finished difference. Result has 147 places, 147 transitions, 746 flow [2025-02-08 08:35:34,835 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=746, PETRI_PLACES=147, PETRI_TRANSITIONS=147} [2025-02-08 08:35:34,835 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 33 predicate places. [2025-02-08 08:35:34,835 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 147 transitions, 746 flow [2025-02-08 08:35:34,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 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 08:35:34,836 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:34,836 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:34,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-08 08:35:35,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-08 08:35:35,037 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:35,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:35,037 INFO L85 PathProgramCache]: Analyzing trace with hash -140160127, now seen corresponding path program 2 times [2025-02-08 08:35:35,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:35,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827645488] [2025-02-08 08:35:35,038 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:35:35,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:35,045 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-08 08:35:35,054 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-08 08:35:35,054 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:35:35,054 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:35,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-08 08:35:35,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:35,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827645488] [2025-02-08 08:35:35,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827645488] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:35,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279404889] [2025-02-08 08:35:35,156 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:35:35,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:35,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:35,160 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:35:35,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-08 08:35:35,230 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-02-08 08:35:35,334 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-08 08:35:35,334 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:35:35,334 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:35,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-08 08:35:35,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:35,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2025-02-08 08:35:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-08 08:35:35,421 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:35:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-08 08:35:35,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279404889] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:35:35,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:35:35,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-08 08:35:35,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195787199] [2025-02-08 08:35:35,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:35:35,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:35:35,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:35,524 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:35:35,524 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:35:35,999 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 117 [2025-02-08 08:35:35,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 147 transitions, 746 flow. Second operand has 13 states, 13 states have (on average 68.0) internal successors, (884), 13 states have internal predecessors, (884), 0 states have call successors, (0), 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 08:35:35,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:36,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 117 [2025-02-08 08:35:36,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:37,490 INFO L124 PetriNetUnfolderBase]: 7599/19373 cut-off events. [2025-02-08 08:35:37,491 INFO L125 PetriNetUnfolderBase]: For 234/234 co-relation queries the response was YES. [2025-02-08 08:35:37,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30463 conditions, 19373 events. 7599/19373 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 1151. Compared 222520 event pairs, 5536 based on Foata normal form. 0/14528 useless extension candidates. Maximal degree in co-relation 15333. Up to 10567 conditions per place. [2025-02-08 08:35:37,633 INFO L140 encePairwiseOnDemand]: 111/117 looper letters, 81 selfloop transitions, 17 changer transitions 0/150 dead transitions. [2025-02-08 08:35:37,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 150 transitions, 959 flow [2025-02-08 08:35:37,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:35:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:35:37,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 640 transitions. [2025-02-08 08:35:37,635 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6077872744539411 [2025-02-08 08:35:37,635 INFO L175 Difference]: Start difference. First operand has 147 places, 147 transitions, 746 flow. Second operand 9 states and 640 transitions. [2025-02-08 08:35:37,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 150 transitions, 959 flow [2025-02-08 08:35:37,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 150 transitions, 952 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:35:37,639 INFO L231 Difference]: Finished difference. Result has 152 places, 150 transitions, 790 flow [2025-02-08 08:35:37,639 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=790, PETRI_PLACES=152, PETRI_TRANSITIONS=150} [2025-02-08 08:35:37,639 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 38 predicate places. [2025-02-08 08:35:37,639 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 150 transitions, 790 flow [2025-02-08 08:35:37,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 68.0) internal successors, (884), 13 states have internal predecessors, (884), 0 states have call successors, (0), 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 08:35:37,640 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:37,640 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:37,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-08 08:35:37,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:37,841 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:37,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:37,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1303756602, now seen corresponding path program 1 times [2025-02-08 08:35:37,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:37,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274720762] [2025-02-08 08:35:37,842 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:37,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:37,850 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-08 08:35:37,859 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 08:35:37,860 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:37,860 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:35:37,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:37,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274720762] [2025-02-08 08:35:37,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274720762] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:37,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772362135] [2025-02-08 08:35:37,984 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:37,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:37,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:37,986 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:35:37,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-08 08:35:38,068 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-08 08:35:38,096 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 08:35:38,097 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:38,097 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:38,099 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-08 08:35:38,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-08 08:35:38,123 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:35:38,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772362135] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:35:38,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:35:38,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2025-02-08 08:35:38,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601638171] [2025-02-08 08:35:38,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:38,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:35:38,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:38,124 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:35:38,124 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:35:38,142 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 117 [2025-02-08 08:35:38,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 150 transitions, 790 flow. Second operand has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:38,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:38,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 117 [2025-02-08 08:35:38,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:39,502 INFO L124 PetriNetUnfolderBase]: 7595/19369 cut-off events. [2025-02-08 08:35:39,502 INFO L125 PetriNetUnfolderBase]: For 239/239 co-relation queries the response was YES. [2025-02-08 08:35:39,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30467 conditions, 19369 events. 7595/19369 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 1151. Compared 222449 event pairs, 5536 based on Foata normal form. 4/14532 useless extension candidates. Maximal degree in co-relation 15334. Up to 10571 conditions per place. [2025-02-08 08:35:39,794 INFO L140 encePairwiseOnDemand]: 113/117 looper letters, 92 selfloop transitions, 5 changer transitions 0/150 dead transitions. [2025-02-08 08:35:39,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 150 transitions, 982 flow [2025-02-08 08:35:39,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:35:39,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:35:39,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 322 transitions. [2025-02-08 08:35:39,798 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.688034188034188 [2025-02-08 08:35:39,798 INFO L175 Difference]: Start difference. First operand has 152 places, 150 transitions, 790 flow. Second operand 4 states and 322 transitions. [2025-02-08 08:35:39,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 150 transitions, 982 flow [2025-02-08 08:35:39,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 150 transitions, 918 flow, removed 7 selfloop flow, removed 6 redundant places. [2025-02-08 08:35:39,804 INFO L231 Difference]: Finished difference. Result has 149 places, 149 transitions, 732 flow [2025-02-08 08:35:39,804 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=732, PETRI_PLACES=149, PETRI_TRANSITIONS=149} [2025-02-08 08:35:39,804 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 35 predicate places. [2025-02-08 08:35:39,804 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 149 transitions, 732 flow [2025-02-08 08:35:39,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:39,804 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:39,804 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:39,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-08 08:35:40,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:40,009 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:40,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:40,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1303615133, now seen corresponding path program 1 times [2025-02-08 08:35:40,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:40,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380129995] [2025-02-08 08:35:40,009 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:40,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:40,017 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-08 08:35:40,022 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 08:35:40,022 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:40,022 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:40,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:35:40,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:40,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380129995] [2025-02-08 08:35:40,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380129995] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:40,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508648190] [2025-02-08 08:35:40,106 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:40,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:40,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:40,109 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:35:40,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-08 08:35:40,173 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-08 08:35:40,195 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 08:35:40,196 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:40,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:40,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 08:35:40,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:35:40,243 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:35:40,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:35:40,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508648190] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:35:40,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:35:40,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-02-08 08:35:40,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659649022] [2025-02-08 08:35:40,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:35:40,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-08 08:35:40,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:40,287 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-08 08:35:40,287 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:35:40,484 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 117 [2025-02-08 08:35:40,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 149 transitions, 732 flow. Second operand has 14 states, 14 states have (on average 70.42857142857143) internal successors, (986), 14 states have internal predecessors, (986), 0 states have call successors, (0), 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 08:35:40,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:40,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 117 [2025-02-08 08:35:40,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:43,027 INFO L124 PetriNetUnfolderBase]: 14915/37517 cut-off events. [2025-02-08 08:35:43,028 INFO L125 PetriNetUnfolderBase]: For 401/401 co-relation queries the response was YES. [2025-02-08 08:35:43,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59101 conditions, 37517 events. 14915/37517 cut-off events. For 401/401 co-relation queries the response was YES. Maximal size of possible extension queue 2235. Compared 471109 event pairs, 10992 based on Foata normal form. 4/28444 useless extension candidates. Maximal degree in co-relation 29662. Up to 10518 conditions per place. [2025-02-08 08:35:43,327 INFO L140 encePairwiseOnDemand]: 104/117 looper letters, 117 selfloop transitions, 43 changer transitions 0/213 dead transitions. [2025-02-08 08:35:43,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 213 transitions, 1350 flow [2025-02-08 08:35:43,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:35:43,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:35:43,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 635 transitions. [2025-02-08 08:35:43,329 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6784188034188035 [2025-02-08 08:35:43,329 INFO L175 Difference]: Start difference. First operand has 149 places, 149 transitions, 732 flow. Second operand 8 states and 635 transitions. [2025-02-08 08:35:43,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 213 transitions, 1350 flow [2025-02-08 08:35:43,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 213 transitions, 1332 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:35:43,334 INFO L231 Difference]: Finished difference. Result has 158 places, 164 transitions, 1003 flow [2025-02-08 08:35:43,334 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1003, PETRI_PLACES=158, PETRI_TRANSITIONS=164} [2025-02-08 08:35:43,334 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 44 predicate places. [2025-02-08 08:35:43,334 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 164 transitions, 1003 flow [2025-02-08 08:35:43,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.42857142857143) internal successors, (986), 14 states have internal predecessors, (986), 0 states have call successors, (0), 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 08:35:43,335 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:43,335 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:43,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-08 08:35:43,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:43,535 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:43,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:43,536 INFO L85 PathProgramCache]: Analyzing trace with hash 327921657, now seen corresponding path program 2 times [2025-02-08 08:35:43,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:43,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903496552] [2025-02-08 08:35:43,536 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:35:43,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:43,544 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-08 08:35:43,560 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 08:35:43,560 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:35:43,560 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:35:43,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:43,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903496552] [2025-02-08 08:35:43,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903496552] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:43,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650205755] [2025-02-08 08:35:43,704 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:35:43,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:43,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:43,706 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:35:43,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-08 08:35:43,778 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-08 08:35:43,812 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 08:35:43,812 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:35:43,812 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:43,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-08 08:35:43,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:43,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-08 08:35:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:35:43,905 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:35:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:35:44,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650205755] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:35:44,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:35:44,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-08 08:35:44,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891219470] [2025-02-08 08:35:44,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:35:44,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:35:44,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:44,002 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:35:44,002 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:35:44,475 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 117 [2025-02-08 08:35:44,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 164 transitions, 1003 flow. Second operand has 13 states, 13 states have (on average 68.46153846153847) internal successors, (890), 13 states have internal predecessors, (890), 0 states have call successors, (0), 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 08:35:44,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:44,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 117 [2025-02-08 08:35:44,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:47,340 INFO L124 PetriNetUnfolderBase]: 15179/38689 cut-off events. [2025-02-08 08:35:47,340 INFO L125 PetriNetUnfolderBase]: For 469/469 co-relation queries the response was YES. [2025-02-08 08:35:47,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60701 conditions, 38689 events. 15179/38689 cut-off events. For 469/469 co-relation queries the response was YES. Maximal size of possible extension queue 2257. Compared 490024 event pairs, 11072 based on Foata normal form. 0/29009 useless extension candidates. Maximal degree in co-relation 30497. Up to 21085 conditions per place. [2025-02-08 08:35:47,631 INFO L140 encePairwiseOnDemand]: 111/117 looper letters, 98 selfloop transitions, 14 changer transitions 0/164 dead transitions. [2025-02-08 08:35:47,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 164 transitions, 1227 flow [2025-02-08 08:35:47,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:35:47,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:35:47,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 505 transitions. [2025-02-08 08:35:47,636 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6166056166056166 [2025-02-08 08:35:47,636 INFO L175 Difference]: Start difference. First operand has 158 places, 164 transitions, 1003 flow. Second operand 7 states and 505 transitions. [2025-02-08 08:35:47,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 164 transitions, 1227 flow [2025-02-08 08:35:47,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 164 transitions, 1225 flow, removed 1 selfloop flow, removed 0 redundant places. [2025-02-08 08:35:47,640 INFO L231 Difference]: Finished difference. Result has 163 places, 164 transitions, 1029 flow [2025-02-08 08:35:47,644 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1029, PETRI_PLACES=163, PETRI_TRANSITIONS=164} [2025-02-08 08:35:47,645 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 49 predicate places. [2025-02-08 08:35:47,645 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 164 transitions, 1029 flow [2025-02-08 08:35:47,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 68.46153846153847) internal successors, (890), 13 states have internal predecessors, (890), 0 states have call successors, (0), 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 08:35:47,645 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:47,645 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:47,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-02-08 08:35:47,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-02-08 08:35:47,846 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:47,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:47,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1356129039, now seen corresponding path program 1 times [2025-02-08 08:35:47,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:47,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014607200] [2025-02-08 08:35:47,850 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:47,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:47,859 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-08 08:35:47,874 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 08:35:47,874 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:47,874 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:35:48,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:48,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014607200] [2025-02-08 08:35:48,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014607200] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:48,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716821990] [2025-02-08 08:35:48,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:48,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:48,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:48,299 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:35:48,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-08 08:35:48,369 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-08 08:35:48,398 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 08:35:48,398 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:48,398 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:48,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-02-08 08:35:48,402 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:48,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-08 08:35:48,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:35:48,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2025-02-08 08:35:48,480 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2025-02-08 08:35:48,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2025-02-08 08:35:48,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:35:48,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2025-02-08 08:35:48,554 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2025-02-08 08:35:48,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 28 [2025-02-08 08:35:48,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:35:48,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2025-02-08 08:35:48,620 INFO L349 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2025-02-08 08:35:48,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2025-02-08 08:35:48,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:35:48,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2025-02-08 08:35:48,728 INFO L349 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2025-02-08 08:35:48,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2025-02-08 08:35:48,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:35:48,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2025-02-08 08:35:48,857 INFO L349 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2025-02-08 08:35:48,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 32 [2025-02-08 08:35:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-08 08:35:48,900 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:35:48,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716821990] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:35:48,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:35:48,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2025-02-08 08:35:48,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847348647] [2025-02-08 08:35:48,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:48,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:35:48,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:48,901 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:35:48,901 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2025-02-08 08:35:50,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-02-08 08:35:51,296 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 117 [2025-02-08 08:35:51,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 164 transitions, 1029 flow. Second operand has 8 states, 8 states have (on average 59.625) internal successors, (477), 8 states have internal predecessors, (477), 0 states have call successors, (0), 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 08:35:51,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:51,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 117 [2025-02-08 08:35:51,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:54,282 INFO L124 PetriNetUnfolderBase]: 15179/36497 cut-off events. [2025-02-08 08:35:54,282 INFO L125 PetriNetUnfolderBase]: For 507/507 co-relation queries the response was YES. [2025-02-08 08:35:54,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58551 conditions, 36497 events. 15179/36497 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 2103. Compared 442172 event pairs, 11072 based on Foata normal form. 2296/31201 useless extension candidates. Maximal degree in co-relation 29422. Up to 21072 conditions per place. [2025-02-08 08:35:54,511 INFO L140 encePairwiseOnDemand]: 105/117 looper letters, 103 selfloop transitions, 9 changer transitions 0/156 dead transitions. [2025-02-08 08:35:54,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 156 transitions, 1237 flow [2025-02-08 08:35:54,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:35:54,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:35:54,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 397 transitions. [2025-02-08 08:35:54,513 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5655270655270656 [2025-02-08 08:35:54,513 INFO L175 Difference]: Start difference. First operand has 163 places, 164 transitions, 1029 flow. Second operand 6 states and 397 transitions. [2025-02-08 08:35:54,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 156 transitions, 1237 flow [2025-02-08 08:35:54,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 156 transitions, 1187 flow, removed 3 selfloop flow, removed 6 redundant places. [2025-02-08 08:35:54,518 INFO L231 Difference]: Finished difference. Result has 154 places, 156 transitions, 981 flow [2025-02-08 08:35:54,518 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=963, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=981, PETRI_PLACES=154, PETRI_TRANSITIONS=156} [2025-02-08 08:35:54,518 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 40 predicate places. [2025-02-08 08:35:54,519 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 156 transitions, 981 flow [2025-02-08 08:35:54,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 59.625) internal successors, (477), 8 states have internal predecessors, (477), 0 states have call successors, (0), 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 08:35:54,519 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:54,519 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:54,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-08 08:35:54,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:54,723 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:54,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:54,723 INFO L85 PathProgramCache]: Analyzing trace with hash 909673982, now seen corresponding path program 1 times [2025-02-08 08:35:54,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:54,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008682736] [2025-02-08 08:35:54,723 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:54,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:54,731 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-08 08:35:54,743 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 08:35:54,744 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:54,744 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:35:54,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:54,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008682736] [2025-02-08 08:35:54,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008682736] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:35:54,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:35:54,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:35:54,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719031687] [2025-02-08 08:35:54,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:54,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:35:54,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:54,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:35:54,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:35:54,993 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 117 [2025-02-08 08:35:54,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 156 transitions, 981 flow. Second operand has 5 states, 5 states have (on average 64.4) internal successors, (322), 5 states have internal predecessors, (322), 0 states have call successors, (0), 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 08:35:54,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:54,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 117 [2025-02-08 08:35:54,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:58,015 INFO L124 PetriNetUnfolderBase]: 17611/37617 cut-off events. [2025-02-08 08:35:58,016 INFO L125 PetriNetUnfolderBase]: For 511/511 co-relation queries the response was YES. [2025-02-08 08:35:58,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63044 conditions, 37617 events. 17611/37617 cut-off events. For 511/511 co-relation queries the response was YES. Maximal size of possible extension queue 2101. Compared 420120 event pairs, 13008 based on Foata normal form. 0/32069 useless extension candidates. Maximal degree in co-relation 31676. Up to 24456 conditions per place. [2025-02-08 08:35:58,300 INFO L140 encePairwiseOnDemand]: 110/117 looper letters, 106 selfloop transitions, 7 changer transitions 0/152 dead transitions. [2025-02-08 08:35:58,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 152 transitions, 1199 flow [2025-02-08 08:35:58,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:35:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:35:58,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 352 transitions. [2025-02-08 08:35:58,302 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6017094017094017 [2025-02-08 08:35:58,302 INFO L175 Difference]: Start difference. First operand has 154 places, 156 transitions, 981 flow. Second operand 5 states and 352 transitions. [2025-02-08 08:35:58,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 152 transitions, 1199 flow [2025-02-08 08:35:58,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 152 transitions, 1185 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:35:58,306 INFO L231 Difference]: Finished difference. Result has 150 places, 152 transitions, 973 flow [2025-02-08 08:35:58,306 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=959, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=973, PETRI_PLACES=150, PETRI_TRANSITIONS=152} [2025-02-08 08:35:58,307 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 36 predicate places. [2025-02-08 08:35:58,307 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 152 transitions, 973 flow [2025-02-08 08:35:58,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.4) internal successors, (322), 5 states have internal predecessors, (322), 0 states have call successors, (0), 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 08:35:58,307 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:58,307 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:58,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2025-02-08 08:35:58,307 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:35:58,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:58,308 INFO L85 PathProgramCache]: Analyzing trace with hash 909673983, now seen corresponding path program 1 times [2025-02-08 08:35:58,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:58,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334485620] [2025-02-08 08:35:58,308 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:58,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:58,316 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-08 08:35:58,333 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 08:35:58,333 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:58,334 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-08 08:35:58,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:58,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334485620] [2025-02-08 08:35:58,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334485620] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:58,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87812052] [2025-02-08 08:35:58,764 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:58,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:58,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:58,766 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:35:58,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-08 08:35:58,844 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-08 08:35:58,877 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 08:35:58,877 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:58,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:58,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-02-08 08:35:58,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:58,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-08 08:35:58,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:35:58,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2025-02-08 08:35:58,959 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-02-08 08:35:58,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-02-08 08:35:58,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:35:58,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2025-02-08 08:35:59,008 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-02-08 08:35:59,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-02-08 08:35:59,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:35:59,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2025-02-08 08:35:59,044 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-02-08 08:35:59,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-02-08 08:35:59,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:35:59,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2025-02-08 08:35:59,074 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:35:59,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-08 08:35:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-08 08:35:59,115 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:35:59,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 110 [2025-02-08 08:35:59,623 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:35:59,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 100 [2025-02-08 08:35:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-08 08:35:59,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87812052] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:35:59,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:35:59,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2025-02-08 08:35:59,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185200719] [2025-02-08 08:35:59,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:35:59,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-08 08:35:59,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:59,633 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-08 08:35:59,633 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2025-02-08 08:36:02,808 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 117 [2025-02-08 08:36:02,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 152 transitions, 973 flow. Second operand has 16 states, 16 states have (on average 59.75) internal successors, (956), 16 states have internal predecessors, (956), 0 states have call successors, (0), 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 08:36:02,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:02,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 117 [2025-02-08 08:36:02,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:36:05,613 INFO L124 PetriNetUnfolderBase]: 17611/36633 cut-off events. [2025-02-08 08:36:05,614 INFO L125 PetriNetUnfolderBase]: For 511/511 co-relation queries the response was YES. [2025-02-08 08:36:05,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62066 conditions, 36633 events. 17611/36633 cut-off events. For 511/511 co-relation queries the response was YES. Maximal size of possible extension queue 2028. Compared 399065 event pairs, 13008 based on Foata normal form. 0/31085 useless extension candidates. Maximal degree in co-relation 31190. Up to 24472 conditions per place. [2025-02-08 08:36:05,840 INFO L140 encePairwiseOnDemand]: 106/117 looper letters, 79 selfloop transitions, 34 changer transitions 0/148 dead transitions. [2025-02-08 08:36:05,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 148 transitions, 1191 flow [2025-02-08 08:36:05,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:36:05,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:36:05,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 445 transitions. [2025-02-08 08:36:05,841 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5433455433455433 [2025-02-08 08:36:05,841 INFO L175 Difference]: Start difference. First operand has 150 places, 152 transitions, 973 flow. Second operand 7 states and 445 transitions. [2025-02-08 08:36:05,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 148 transitions, 1191 flow [2025-02-08 08:36:05,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 148 transitions, 1181 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:36:05,849 INFO L231 Difference]: Finished difference. Result has 149 places, 148 transitions, 1023 flow [2025-02-08 08:36:05,849 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=955, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1023, PETRI_PLACES=149, PETRI_TRANSITIONS=148} [2025-02-08 08:36:05,849 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 35 predicate places. [2025-02-08 08:36:05,850 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 148 transitions, 1023 flow [2025-02-08 08:36:05,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 59.75) internal successors, (956), 16 states have internal predecessors, (956), 0 states have call successors, (0), 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 08:36:05,850 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:05,850 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:36:05,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-08 08:36:06,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:36:06,051 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:36:06,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:06,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1864876364, now seen corresponding path program 1 times [2025-02-08 08:36:06,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:06,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783768247] [2025-02-08 08:36:06,052 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:06,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:06,063 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-08 08:36:06,083 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 08:36:06,083 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:06,083 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:36:06,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:06,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783768247] [2025-02-08 08:36:06,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783768247] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:36:06,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334134049] [2025-02-08 08:36:06,595 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:06,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:36:06,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:36:06,600 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:36:06,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-08 08:36:06,679 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-08 08:36:06,710 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 08:36:06,710 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:06,710 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:06,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-08 08:36:06,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:36:06,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-08 08:36:06,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:36:06,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-02-08 08:36:06,836 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-02-08 08:36:06,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-02-08 08:36:06,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:36:06,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-02-08 08:36:06,877 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:36:06,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-08 08:36:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-08 08:36:06,915 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:36:07,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 99 [2025-02-08 08:36:07,218 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:36:07,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 149 [2025-02-08 08:36:07,340 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-08 08:36:07,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334134049] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:36:07,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:36:07,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2025-02-08 08:36:07,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146678879] [2025-02-08 08:36:07,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:36:07,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-08 08:36:07,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:07,342 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-08 08:36:07,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2025-02-08 08:36:13,349 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 117 [2025-02-08 08:36:13,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 148 transitions, 1023 flow. Second operand has 22 states, 22 states have (on average 60.68181818181818) internal successors, (1335), 22 states have internal predecessors, (1335), 0 states have call successors, (0), 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 08:36:13,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:13,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 117 [2025-02-08 08:36:13,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:36:17,011 INFO L124 PetriNetUnfolderBase]: 25475/49193 cut-off events. [2025-02-08 08:36:17,011 INFO L125 PetriNetUnfolderBase]: For 502/502 co-relation queries the response was YES. [2025-02-08 08:36:17,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85381 conditions, 49193 events. 25475/49193 cut-off events. For 502/502 co-relation queries the response was YES. Maximal size of possible extension queue 2730. Compared 524761 event pairs, 11868 based on Foata normal form. 0/39357 useless extension candidates. Maximal degree in co-relation 50545. Up to 14984 conditions per place. [2025-02-08 08:36:17,330 INFO L140 encePairwiseOnDemand]: 96/117 looper letters, 147 selfloop transitions, 43 changer transitions 0/220 dead transitions. [2025-02-08 08:36:17,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 220 transitions, 1628 flow [2025-02-08 08:36:17,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-08 08:36:17,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-08 08:36:17,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 829 transitions. [2025-02-08 08:36:17,332 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5904558404558404 [2025-02-08 08:36:17,332 INFO L175 Difference]: Start difference. First operand has 149 places, 148 transitions, 1023 flow. Second operand 12 states and 829 transitions. [2025-02-08 08:36:17,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 220 transitions, 1628 flow [2025-02-08 08:36:17,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 220 transitions, 1556 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-08 08:36:17,338 INFO L231 Difference]: Finished difference. Result has 159 places, 162 transitions, 1209 flow [2025-02-08 08:36:17,338 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=955, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1209, PETRI_PLACES=159, PETRI_TRANSITIONS=162} [2025-02-08 08:36:17,339 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 45 predicate places. [2025-02-08 08:36:17,339 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 162 transitions, 1209 flow [2025-02-08 08:36:17,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 60.68181818181818) internal successors, (1335), 22 states have internal predecessors, (1335), 0 states have call successors, (0), 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 08:36:17,339 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:36:17,339 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:36:17,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-02-08 08:36:17,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:36:17,542 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:36:17,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:36:17,543 INFO L85 PathProgramCache]: Analyzing trace with hash -2058499568, now seen corresponding path program 1 times [2025-02-08 08:36:17,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:36:17,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620227929] [2025-02-08 08:36:17,543 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:17,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:36:17,552 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-08 08:36:17,564 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 08:36:17,564 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:17,564 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-02-08 08:36:17,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:36:17,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620227929] [2025-02-08 08:36:17,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620227929] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:36:17,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199213415] [2025-02-08 08:36:17,779 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:36:17,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:36:17,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:36:17,783 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:36:17,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-08 08:36:17,864 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-08 08:36:17,895 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 08:36:17,895 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:36:17,895 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:36:17,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-08 08:36:17,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:36:17,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-08 08:36:17,917 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-02-08 08:36:17,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-02-08 08:36:17,928 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-02-08 08:36:17,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-02-08 08:36:17,942 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-02-08 08:36:17,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-02-08 08:36:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-08 08:36:17,955 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:36:17,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199213415] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:36:17,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:36:17,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2025-02-08 08:36:17,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907804021] [2025-02-08 08:36:17,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:36:17,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:36:17,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:36:17,956 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:36:17,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:36:17,997 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 117 [2025-02-08 08:36:17,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 162 transitions, 1209 flow. Second operand has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 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 08:36:17,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:36:17,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 117 [2025-02-08 08:36:17,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand