./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-series2.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/popl20-more-buffer-series2.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 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:40:30,895 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:40:30,932 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:40:30,935 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:40:30,936 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:40:30,950 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:40:30,950 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:40:30,950 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:40:30,951 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:40:30,951 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:40:30,951 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:40:30,951 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:40:30,951 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:40:30,951 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:40:30,951 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:40:30,952 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:40:30,952 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:40:30,952 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:40:30,952 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:40:30,952 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:40:30,952 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:40:30,952 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:40:30,952 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:40:30,952 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:40:30,952 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:40:30,952 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:40:30,953 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:40:30,953 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:40:30,953 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:40:30,953 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:40:30,953 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:40:30,953 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:40:30,953 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:40:30,953 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:40:30,953 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:40:30,953 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:40:30,954 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:40:30,954 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:40:30,954 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:40:30,954 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:40:30,954 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:40:30,954 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:40:30,954 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 -> 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 [2025-02-08 08:40:31,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:40:31,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:40:31,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:40:31,211 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:40:31,211 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:40:31,212 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2025-02-08 08:40:32,368 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9577e59ac/19038b3b722a4a30a279bea7d1fefb84/FLAG3eb70fb72 [2025-02-08 08:40:32,596 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:40:32,597 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2025-02-08 08:40:32,603 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9577e59ac/19038b3b722a4a30a279bea7d1fefb84/FLAG3eb70fb72 [2025-02-08 08:40:32,614 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9577e59ac/19038b3b722a4a30a279bea7d1fefb84 [2025-02-08 08:40:32,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:40:32,617 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:40:32,618 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:40:32,618 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:40:32,621 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:40:32,622 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:40:32" (1/1) ... [2025-02-08 08:40:32,622 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68001dfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:32, skipping insertion in model container [2025-02-08 08:40:32,622 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:40:32" (1/1) ... [2025-02-08 08:40:32,639 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:40:32,792 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 08:40:32,799 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:40:32,808 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:40:32,837 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:40:32,850 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:40:32,852 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:32 WrapperNode [2025-02-08 08:40:32,852 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:40:32,853 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:40:32,853 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:40:32,853 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:40:32,857 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:32" (1/1) ... [2025-02-08 08:40:32,864 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:32" (1/1) ... [2025-02-08 08:40:32,895 INFO L138 Inliner]: procedures = 26, calls = 64, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 317 [2025-02-08 08:40:32,898 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:40:32,898 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:40:32,898 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:40:32,898 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:40:32,904 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:32" (1/1) ... [2025-02-08 08:40:32,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:32" (1/1) ... [2025-02-08 08:40:32,913 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:32" (1/1) ... [2025-02-08 08:40:32,930 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-02-08 08:40:32,931 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:32" (1/1) ... [2025-02-08 08:40:32,931 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:32" (1/1) ... [2025-02-08 08:40:32,944 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:32" (1/1) ... [2025-02-08 08:40:32,945 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:32" (1/1) ... [2025-02-08 08:40:32,947 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:32" (1/1) ... [2025-02-08 08:40:32,948 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:32" (1/1) ... [2025-02-08 08:40:32,950 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:40:32,951 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:40:32,951 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:40:32,951 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:40:32,955 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:32" (1/1) ... [2025-02-08 08:40:32,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:40:32,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:32,981 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 08:40:32,993 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 08:40:33,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:40:33,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 08:40:33,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 08:40:33,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 08:40:33,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 08:40:33,010 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 08:40:33,010 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 08:40:33,010 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 08:40:33,010 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 08:40:33,010 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-08 08:40:33,010 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-08 08:40:33,011 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-02-08 08:40:33,011 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-02-08 08:40:33,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:40:33,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 08:40:33,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-08 08:40:33,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-08 08:40:33,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 08:40:33,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:40:33,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:40:33,012 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 08:40:33,111 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:40:33,112 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:40:33,312 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L97: [2025-02-08 08:40:33,313 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L98: ~cond~2#1 := (if 0 == (if ~i~0 < ~N~0 || ~q1_front~0 < ~q1_back~0 then 1 else 0) then 0 else 1); [2025-02-08 08:40:33,313 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L95: havoc #t~ret11#1; [2025-02-08 08:40:33,313 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L95-1: havoc #t~mem10#1; [2025-02-08 08:40:33,313 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L95-2: ~total~0 := #t~ret11#1; [2025-02-08 08:40:33,314 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L95-3: assume { :end_inline_plus } true;assume -2147483648 <= #t~ret11#1 && #t~ret11#1 <= 2147483647; [2025-02-08 08:40:33,314 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L95-4: havoc plus_#in~a#1, plus_#in~b#1; [2025-02-08 08:40:33,314 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L95-5: havoc plus_~a#1, plus_~b#1; [2025-02-08 08:40:33,314 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L95-6: #t~ret11#1 := plus_#res#1; [2025-02-08 08:40:33,314 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L100: [2025-02-08 08:40:33,314 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L96: havoc #t~post12#1; [2025-02-08 08:40:33,314 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L96-1: ~q1_front~0 := 1 + #t~post12#1; [2025-02-08 08:40:33,314 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L96-2: #t~post12#1 := ~q1_front~0; [2025-02-08 08:40:33,351 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L118: [2025-02-08 08:40:33,351 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L114: havoc #t~post15#1; [2025-02-08 08:40:33,351 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L114-1: ~q2_front~0 := 1 + #t~post15#1; [2025-02-08 08:40:33,351 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L114-2: #t~post15#1 := ~q2_front~0; [2025-02-08 08:40:33,351 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L115: [2025-02-08 08:40:33,351 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L116: ~cond~3#1 := (if 0 == (if ~j~0 < ~N~0 || ~q2_front~0 < ~q2_back~0 then 1 else 0) then 0 else 1); [2025-02-08 08:40:33,351 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L113: havoc #t~ret14#1; [2025-02-08 08:40:33,351 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L113-1: havoc #t~mem13#1; [2025-02-08 08:40:33,352 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L113-2: ~total~0 := #t~ret14#1; [2025-02-08 08:40:33,352 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L113-3: assume { :end_inline_plus } true;assume -2147483648 <= #t~ret14#1 && #t~ret14#1 <= 2147483647; [2025-02-08 08:40:33,352 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L113-4: havoc plus_#in~a#1, plus_#in~b#1; [2025-02-08 08:40:33,352 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L113-5: havoc plus_~a#1, plus_~b#1; [2025-02-08 08:40:33,352 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L113-6: #t~ret14#1 := plus_#res#1; [2025-02-08 08:40:33,505 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:40:33,505 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:40:33,761 WARN L149 AtomicBlockAnalyzer]: Unexpected successor node of atomic block begin: L170 is not an error location. [2025-02-08 08:40:33,762 WARN L149 AtomicBlockAnalyzer]: Unexpected successor node of atomic block begin: L170 is not an error location. [2025-02-08 08:40:33,763 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:40:33,764 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:40:33,764 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:40:33 BoogieIcfgContainer [2025-02-08 08:40:33,764 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:40:33,766 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:40:33,766 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:40:33,769 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:40:33,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:40:32" (1/3) ... [2025-02-08 08:40:33,770 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@717c5ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:40:33, skipping insertion in model container [2025-02-08 08:40:33,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:32" (2/3) ... [2025-02-08 08:40:33,771 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@717c5ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:40:33, skipping insertion in model container [2025-02-08 08:40:33,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:40:33" (3/3) ... [2025-02-08 08:40:33,772 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2025-02-08 08:40:33,785 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:40:33,786 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-buffer-series2.wvr.c that has 5 procedures, 69 locations, 1 initial locations, 7 loop locations, and 22 error locations. [2025-02-08 08:40:33,786 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:40:33,851 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-02-08 08:40:33,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 73 transitions, 174 flow [2025-02-08 08:40:33,911 INFO L124 PetriNetUnfolderBase]: 5/69 cut-off events. [2025-02-08 08:40:33,914 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-08 08:40:33,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 69 events. 5/69 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 195 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2025-02-08 08:40:33,919 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 73 transitions, 174 flow [2025-02-08 08:40:33,922 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 68 transitions, 160 flow [2025-02-08 08:40:33,927 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:40:33,939 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;@5b5db136, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:40:33,939 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2025-02-08 08:40:33,941 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:40:33,941 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-08 08:40:33,942 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:40:33,942 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:33,942 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:40:33,942 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-08 08:40:33,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:33,946 INFO L85 PathProgramCache]: Analyzing trace with hash 901191, now seen corresponding path program 1 times [2025-02-08 08:40:33,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:33,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780006176] [2025-02-08 08:40:33,951 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:33,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:34,018 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:40:34,038 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:40:34,039 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:34,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:34,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:34,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780006176] [2025-02-08 08:40:34,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780006176] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:34,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:34,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:40:34,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614349209] [2025-02-08 08:40:34,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:34,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:40:34,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:34,190 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:40:34,190 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:40:34,202 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2025-02-08 08:40:34,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 08:40:34,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:34,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2025-02-08 08:40:34,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:36,183 INFO L124 PetriNetUnfolderBase]: 17877/24508 cut-off events. [2025-02-08 08:40:36,183 INFO L125 PetriNetUnfolderBase]: For 627/627 co-relation queries the response was YES. [2025-02-08 08:40:36,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49495 conditions, 24508 events. 17877/24508 cut-off events. For 627/627 co-relation queries the response was YES. Maximal size of possible extension queue 1541. Compared 161565 event pairs, 16460 based on Foata normal form. 1/14463 useless extension candidates. Maximal degree in co-relation 46800. Up to 23728 conditions per place. [2025-02-08 08:40:36,389 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 47 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2025-02-08 08:40:36,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 61 transitions, 244 flow [2025-02-08 08:40:36,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:40:36,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:40:36,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2025-02-08 08:40:36,399 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4840182648401826 [2025-02-08 08:40:36,400 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 160 flow. Second operand 3 states and 106 transitions. [2025-02-08 08:40:36,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 61 transitions, 244 flow [2025-02-08 08:40:36,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 61 transitions, 228 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-02-08 08:40:36,444 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 134 flow [2025-02-08 08:40:36,445 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2025-02-08 08:40:36,448 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -13 predicate places. [2025-02-08 08:40:36,449 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 134 flow [2025-02-08 08:40:36,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 08:40:36,450 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:36,450 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:40:36,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:40:36,450 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-08 08:40:36,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:36,451 INFO L85 PathProgramCache]: Analyzing trace with hash 901192, now seen corresponding path program 1 times [2025-02-08 08:40:36,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:36,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158134077] [2025-02-08 08:40:36,452 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:36,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:36,465 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:40:36,492 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:40:36,497 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:36,497 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:36,726 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 08:40:36,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:36,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158134077] [2025-02-08 08:40:36,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158134077] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:36,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:36,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:40:36,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631082129] [2025-02-08 08:40:36,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:36,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:40:36,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:36,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:40:36,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:40:36,742 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2025-02-08 08:40:36,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 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 08:40:36,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:36,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2025-02-08 08:40:36,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:38,314 INFO L124 PetriNetUnfolderBase]: 17878/24511 cut-off events. [2025-02-08 08:40:38,314 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2025-02-08 08:40:38,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48715 conditions, 24511 events. 17878/24511 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 1541. Compared 161221 event pairs, 16460 based on Foata normal form. 0/14462 useless extension candidates. Maximal degree in co-relation 48678. Up to 23741 conditions per place. [2025-02-08 08:40:38,439 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 51 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2025-02-08 08:40:38,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 64 transitions, 250 flow [2025-02-08 08:40:38,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:40:38,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:40:38,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2025-02-08 08:40:38,444 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4246575342465753 [2025-02-08 08:40:38,444 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 134 flow. Second operand 4 states and 124 transitions. [2025-02-08 08:40:38,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 64 transitions, 250 flow [2025-02-08 08:40:38,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 64 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:40:38,446 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 157 flow [2025-02-08 08:40:38,446 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=157, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2025-02-08 08:40:38,446 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -10 predicate places. [2025-02-08 08:40:38,446 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 157 flow [2025-02-08 08:40:38,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 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 08:40:38,447 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:38,447 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-08 08:40:38,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:40:38,448 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-08 08:40:38,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:38,448 INFO L85 PathProgramCache]: Analyzing trace with hash 27939243, now seen corresponding path program 1 times [2025-02-08 08:40:38,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:38,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689342523] [2025-02-08 08:40:38,448 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:38,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:38,457 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-08 08:40:38,476 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-08 08:40:38,479 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:38,480 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:38,705 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 08:40:38,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:38,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689342523] [2025-02-08 08:40:38,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689342523] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:38,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:38,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:40:38,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271490783] [2025-02-08 08:40:38,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:38,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:40:38,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:38,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:40:38,708 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:40:38,728 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2025-02-08 08:40:38,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:38,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:38,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2025-02-08 08:40:38,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:40,206 INFO L124 PetriNetUnfolderBase]: 17879/24514 cut-off events. [2025-02-08 08:40:40,207 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2025-02-08 08:40:40,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48732 conditions, 24514 events. 17879/24514 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 1541. Compared 161377 event pairs, 16460 based on Foata normal form. 0/14464 useless extension candidates. Maximal degree in co-relation 48707. Up to 23740 conditions per place. [2025-02-08 08:40:40,308 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 51 selfloop transitions, 7 changer transitions 0/67 dead transitions. [2025-02-08 08:40:40,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 67 transitions, 279 flow [2025-02-08 08:40:40,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:40:40,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:40:40,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2025-02-08 08:40:40,310 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39452054794520547 [2025-02-08 08:40:40,310 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 157 flow. Second operand 5 states and 144 transitions. [2025-02-08 08:40:40,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 67 transitions, 279 flow [2025-02-08 08:40:40,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 67 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:40:40,311 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 191 flow [2025-02-08 08:40:40,311 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=191, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2025-02-08 08:40:40,312 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -5 predicate places. [2025-02-08 08:40:40,312 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 191 flow [2025-02-08 08:40:40,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:40,312 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:40,312 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-08 08:40:40,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 08:40:40,313 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-08 08:40:40,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:40,313 INFO L85 PathProgramCache]: Analyzing trace with hash 866073155, now seen corresponding path program 1 times [2025-02-08 08:40:40,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:40,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481005791] [2025-02-08 08:40:40,313 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:40,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:40,318 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:40:40,324 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:40:40,324 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:40,324 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:40,454 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 08:40:40,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:40,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481005791] [2025-02-08 08:40:40,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481005791] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:40,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132299449] [2025-02-08 08:40:40,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:40,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:40,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:40,459 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 08:40:40,467 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 08:40:40,517 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:40:40,527 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:40:40,527 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:40,527 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:40,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:40:40,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:40,574 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 08:40:40,674 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 08:40:40,675 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:40:40,747 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 08:40:40,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132299449] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:40:40,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:40:40,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-08 08:40:40,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012532268] [2025-02-08 08:40:40,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:40:40,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:40:40,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:40,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:40:40,749 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:40:40,819 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2025-02-08 08:40:40,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 191 flow. Second operand has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 0 states have call successors, (0), 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 08:40:40,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:40,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2025-02-08 08:40:40,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:42,197 INFO L124 PetriNetUnfolderBase]: 17880/24516 cut-off events. [2025-02-08 08:40:42,197 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2025-02-08 08:40:42,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48755 conditions, 24516 events. 17880/24516 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 1541. Compared 161302 event pairs, 16460 based on Foata normal form. 0/14469 useless extension candidates. Maximal degree in co-relation 48717. Up to 23741 conditions per place. [2025-02-08 08:40:42,296 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 50 selfloop transitions, 10 changer transitions 0/69 dead transitions. [2025-02-08 08:40:42,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 69 transitions, 322 flow [2025-02-08 08:40:42,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:40:42,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:40:42,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2025-02-08 08:40:42,302 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3339041095890411 [2025-02-08 08:40:42,302 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 191 flow. Second operand 8 states and 195 transitions. [2025-02-08 08:40:42,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 69 transitions, 322 flow [2025-02-08 08:40:42,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 69 transitions, 321 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:40:42,303 INFO L231 Difference]: Finished difference. Result has 76 places, 69 transitions, 221 flow [2025-02-08 08:40:42,304 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=221, PETRI_PLACES=76, PETRI_TRANSITIONS=69} [2025-02-08 08:40:42,304 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 0 predicate places. [2025-02-08 08:40:42,304 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 69 transitions, 221 flow [2025-02-08 08:40:42,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 0 states have call successors, (0), 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 08:40:42,304 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:42,305 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-02-08 08:40:42,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-08 08:40:42,509 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 08:40:42,509 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-08 08:40:42,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:42,510 INFO L85 PathProgramCache]: Analyzing trace with hash 866117031, now seen corresponding path program 1 times [2025-02-08 08:40:42,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:42,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177706414] [2025-02-08 08:40:42,510 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:42,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:42,516 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:40:42,524 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:40:42,524 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:42,524 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:42,651 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 08:40:42,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:42,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177706414] [2025-02-08 08:40:42,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177706414] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:42,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:42,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:40:42,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108046555] [2025-02-08 08:40:42,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:42,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:40:42,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:42,652 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:40:42,652 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:40:42,678 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2025-02-08 08:40:42,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 69 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:42,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:42,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2025-02-08 08:40:42,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:44,630 INFO L124 PetriNetUnfolderBase]: 17881/24519 cut-off events. [2025-02-08 08:40:44,630 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2025-02-08 08:40:44,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48771 conditions, 24519 events. 17881/24519 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 1541. Compared 161314 event pairs, 16460 based on Foata normal form. 0/14471 useless extension candidates. Maximal degree in co-relation 48725. Up to 23745 conditions per place. [2025-02-08 08:40:44,745 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 54 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2025-02-08 08:40:44,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 72 transitions, 353 flow [2025-02-08 08:40:44,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:40:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:40:44,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2025-02-08 08:40:44,746 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3917808219178082 [2025-02-08 08:40:44,747 INFO L175 Difference]: Start difference. First operand has 76 places, 69 transitions, 221 flow. Second operand 5 states and 143 transitions. [2025-02-08 08:40:44,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 72 transitions, 353 flow [2025-02-08 08:40:44,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 72 transitions, 306 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-02-08 08:40:44,748 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 217 flow [2025-02-08 08:40:44,749 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=217, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2025-02-08 08:40:44,749 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -2 predicate places. [2025-02-08 08:40:44,749 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 217 flow [2025-02-08 08:40:44,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:44,750 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:44,750 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-02-08 08:40:44,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-08 08:40:44,750 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-08 08:40:44,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:44,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1079837667, now seen corresponding path program 1 times [2025-02-08 08:40:44,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:44,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72917848] [2025-02-08 08:40:44,751 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:44,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:44,755 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:40:44,762 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:40:44,763 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:44,763 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:44,895 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 08:40:44,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:44,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72917848] [2025-02-08 08:40:44,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72917848] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:44,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121640985] [2025-02-08 08:40:44,896 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:44,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:44,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:44,900 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 08:40:44,905 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 08:40:44,950 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:40:44,963 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:40:44,963 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:44,963 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:44,964 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-08 08:40:44,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:44,973 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 08:40:45,099 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 08:40:45,099 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:40:45,183 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 08:40:45,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121640985] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:40:45,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:40:45,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-08 08:40:45,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638767002] [2025-02-08 08:40:45,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:40:45,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:40:45,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:45,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:40:45,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:40:45,260 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2025-02-08 08:40:45,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 217 flow. Second operand has 13 states, 13 states have (on average 18.307692307692307) internal successors, (238), 13 states have internal predecessors, (238), 0 states have call successors, (0), 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 08:40:45,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:45,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2025-02-08 08:40:45,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:46,646 INFO L124 PetriNetUnfolderBase]: 17882/24521 cut-off events. [2025-02-08 08:40:46,647 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2025-02-08 08:40:46,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48773 conditions, 24521 events. 17882/24521 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 1541. Compared 161439 event pairs, 16460 based on Foata normal form. 0/14476 useless extension candidates. Maximal degree in co-relation 48721. Up to 23736 conditions per place. [2025-02-08 08:40:46,789 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 47 selfloop transitions, 18 changer transitions 0/74 dead transitions. [2025-02-08 08:40:46,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 74 transitions, 358 flow [2025-02-08 08:40:46,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:40:46,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:40:46,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2025-02-08 08:40:46,791 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3302891933028919 [2025-02-08 08:40:46,791 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 217 flow. Second operand 9 states and 217 transitions. [2025-02-08 08:40:46,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 74 transitions, 358 flow [2025-02-08 08:40:46,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 74 transitions, 350 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:40:46,795 INFO L231 Difference]: Finished difference. Result has 79 places, 74 transitions, 256 flow [2025-02-08 08:40:46,796 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=256, PETRI_PLACES=79, PETRI_TRANSITIONS=74} [2025-02-08 08:40:46,796 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 3 predicate places. [2025-02-08 08:40:46,797 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 74 transitions, 256 flow [2025-02-08 08:40:46,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.307692307692307) internal successors, (238), 13 states have internal predecessors, (238), 0 states have call successors, (0), 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 08:40:46,798 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:46,798 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-02-08 08:40:46,809 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 08:40:46,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:46,999 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-08 08:40:46,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:47,000 INFO L85 PathProgramCache]: Analyzing trace with hash -885161320, now seen corresponding path program 1 times [2025-02-08 08:40:47,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:47,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839053403] [2025-02-08 08:40:47,000 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:47,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:47,009 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-08 08:40:47,018 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-08 08:40:47,018 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:47,018 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:47,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:47,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839053403] [2025-02-08 08:40:47,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839053403] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:47,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164624327] [2025-02-08 08:40:47,199 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:47,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:47,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:47,201 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 08:40:47,203 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 08:40:47,274 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-08 08:40:47,289 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-08 08:40:47,289 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:47,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:47,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:40:47,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:47,306 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 08:40:47,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:47,414 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:40:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:47,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164624327] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:40:47,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:40:47,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-08 08:40:47,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735640525] [2025-02-08 08:40:47,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:40:47,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:40:47,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:47,549 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:40:47,549 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:40:47,651 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2025-02-08 08:40:47,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 74 transitions, 256 flow. Second operand has 13 states, 13 states have (on average 18.46153846153846) internal successors, (240), 13 states have internal predecessors, (240), 0 states have call successors, (0), 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 08:40:47,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:47,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2025-02-08 08:40:47,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:48,986 INFO L124 PetriNetUnfolderBase]: 17882/24520 cut-off events. [2025-02-08 08:40:48,986 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2025-02-08 08:40:49,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48784 conditions, 24520 events. 17882/24520 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 1541. Compared 161336 event pairs, 16460 based on Foata normal form. 0/14476 useless extension candidates. Maximal degree in co-relation 48729. Up to 23737 conditions per place. [2025-02-08 08:40:49,084 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 45 selfloop transitions, 19 changer transitions 0/73 dead transitions. [2025-02-08 08:40:49,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 73 transitions, 380 flow [2025-02-08 08:40:49,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:40:49,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:40:49,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2025-02-08 08:40:49,086 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3424657534246575 [2025-02-08 08:40:49,086 INFO L175 Difference]: Start difference. First operand has 79 places, 74 transitions, 256 flow. Second operand 7 states and 175 transitions. [2025-02-08 08:40:49,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 73 transitions, 380 flow [2025-02-08 08:40:49,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 73 transitions, 347 flow, removed 6 selfloop flow, removed 5 redundant places. [2025-02-08 08:40:49,087 INFO L231 Difference]: Finished difference. Result has 79 places, 73 transitions, 257 flow [2025-02-08 08:40:49,087 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=257, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2025-02-08 08:40:49,088 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 3 predicate places. [2025-02-08 08:40:49,088 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 257 flow [2025-02-08 08:40:49,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.46153846153846) internal successors, (240), 13 states have internal predecessors, (240), 0 states have call successors, (0), 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 08:40:49,088 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:49,088 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:49,094 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 08:40:49,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:49,293 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-08 08:40:49,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:49,294 INFO L85 PathProgramCache]: Analyzing trace with hash -159870466, now seen corresponding path program 1 times [2025-02-08 08:40:49,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:49,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788304542] [2025-02-08 08:40:49,294 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:49,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:49,298 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 08:40:49,302 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:40:49,302 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:49,302 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:49,366 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 08:40:49,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:49,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788304542] [2025-02-08 08:40:49,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788304542] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:49,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:49,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:40:49,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181954103] [2025-02-08 08:40:49,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:49,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:40:49,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:49,367 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:40:49,367 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:40:49,381 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2025-02-08 08:40:49,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 257 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 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 08:40:49,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:49,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2025-02-08 08:40:49,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:50,191 INFO L124 PetriNetUnfolderBase]: 13794/18924 cut-off events. [2025-02-08 08:40:50,191 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2025-02-08 08:40:50,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37667 conditions, 18924 events. 13794/18924 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 1180. Compared 120276 event pairs, 12544 based on Foata normal form. 0/11808 useless extension candidates. Maximal degree in co-relation 37606. Up to 18312 conditions per place. [2025-02-08 08:40:50,245 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 59 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2025-02-08 08:40:50,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 71 transitions, 377 flow [2025-02-08 08:40:50,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:40:50,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:40:50,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2025-02-08 08:40:50,247 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4006849315068493 [2025-02-08 08:40:50,247 INFO L175 Difference]: Start difference. First operand has 79 places, 73 transitions, 257 flow. Second operand 4 states and 117 transitions. [2025-02-08 08:40:50,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 71 transitions, 377 flow [2025-02-08 08:40:50,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 71 transitions, 338 flow, removed 3 selfloop flow, removed 6 redundant places. [2025-02-08 08:40:50,248 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 220 flow [2025-02-08 08:40:50,248 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=220, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2025-02-08 08:40:50,249 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -2 predicate places. [2025-02-08 08:40:50,249 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 220 flow [2025-02-08 08:40:50,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 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 08:40:50,249 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:50,249 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:50,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-08 08:40:50,249 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-08 08:40:50,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:50,250 INFO L85 PathProgramCache]: Analyzing trace with hash -159870465, now seen corresponding path program 1 times [2025-02-08 08:40:50,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:50,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325843036] [2025-02-08 08:40:50,250 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:50,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:50,257 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 08:40:50,264 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:40:50,264 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:50,264 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:50,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:50,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:50,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325843036] [2025-02-08 08:40:50,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325843036] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:50,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:50,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:40:50,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054563823] [2025-02-08 08:40:50,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:50,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:40:50,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:50,319 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:40:50,319 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:40:50,325 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2025-02-08 08:40:50,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 220 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:50,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:50,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2025-02-08 08:40:50,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:51,236 INFO L124 PetriNetUnfolderBase]: 16530/22880 cut-off events. [2025-02-08 08:40:51,236 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2025-02-08 08:40:51,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45539 conditions, 22880 events. 16530/22880 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 1261. Compared 147400 event pairs, 15126 based on Foata normal form. 630/16153 useless extension candidates. Maximal degree in co-relation 37578. Up to 18333 conditions per place. [2025-02-08 08:40:51,334 INFO L140 encePairwiseOnDemand]: 63/73 looper letters, 103 selfloop transitions, 3 changer transitions 0/115 dead transitions. [2025-02-08 08:40:51,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 115 transitions, 563 flow [2025-02-08 08:40:51,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:40:51,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:40:51,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 172 transitions. [2025-02-08 08:40:51,335 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.589041095890411 [2025-02-08 08:40:51,335 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 220 flow. Second operand 4 states and 172 transitions. [2025-02-08 08:40:51,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 115 transitions, 563 flow [2025-02-08 08:40:51,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 115 transitions, 557 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:40:51,337 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 237 flow [2025-02-08 08:40:51,337 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=237, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2025-02-08 08:40:51,338 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 0 predicate places. [2025-02-08 08:40:51,338 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 237 flow [2025-02-08 08:40:51,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:51,338 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:51,338 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:51,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-08 08:40:51,338 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-08 08:40:51,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:51,339 INFO L85 PathProgramCache]: Analyzing trace with hash 621556343, now seen corresponding path program 1 times [2025-02-08 08:40:51,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:51,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912312243] [2025-02-08 08:40:51,339 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:51,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:51,344 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:40:51,350 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:40:51,352 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:51,352 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:51,398 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 08:40:51,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:51,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912312243] [2025-02-08 08:40:51,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912312243] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:51,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:51,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:40:51,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174776225] [2025-02-08 08:40:51,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:51,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:40:51,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:51,400 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:40:51,400 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:40:51,406 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2025-02-08 08:40:51,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 237 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:51,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:51,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2025-02-08 08:40:51,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:53,237 INFO L124 PetriNetUnfolderBase]: 19965/28055 cut-off events. [2025-02-08 08:40:53,238 INFO L125 PetriNetUnfolderBase]: For 1748/1748 co-relation queries the response was YES. [2025-02-08 08:40:53,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61557 conditions, 28055 events. 19965/28055 cut-off events. For 1748/1748 co-relation queries the response was YES. Maximal size of possible extension queue 1434. Compared 189259 event pairs, 18407 based on Foata normal form. 636/20047 useless extension candidates. Maximal degree in co-relation 51858. Up to 22158 conditions per place. [2025-02-08 08:40:53,418 INFO L140 encePairwiseOnDemand]: 61/73 looper letters, 90 selfloop transitions, 7 changer transitions 0/106 dead transitions. [2025-02-08 08:40:53,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 106 transitions, 535 flow [2025-02-08 08:40:53,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:40:53,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:40:53,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 192 transitions. [2025-02-08 08:40:53,420 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5260273972602739 [2025-02-08 08:40:53,420 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 237 flow. Second operand 5 states and 192 transitions. [2025-02-08 08:40:53,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 106 transitions, 535 flow [2025-02-08 08:40:53,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 106 transitions, 530 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:40:53,425 INFO L231 Difference]: Finished difference. Result has 80 places, 73 transitions, 277 flow [2025-02-08 08:40:53,425 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=277, PETRI_PLACES=80, PETRI_TRANSITIONS=73} [2025-02-08 08:40:53,425 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 4 predicate places. [2025-02-08 08:40:53,425 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 73 transitions, 277 flow [2025-02-08 08:40:53,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:53,426 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:53,426 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:53,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-08 08:40:53,426 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-08 08:40:53,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:53,426 INFO L85 PathProgramCache]: Analyzing trace with hash 688350135, now seen corresponding path program 1 times [2025-02-08 08:40:53,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:53,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329314297] [2025-02-08 08:40:53,427 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:53,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:53,432 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:40:53,437 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:40:53,437 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:53,437 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:53,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:40:53,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:53,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329314297] [2025-02-08 08:40:53,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329314297] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:53,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:53,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 08:40:53,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481675812] [2025-02-08 08:40:53,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:53,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:40:53,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:53,534 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:40:53,534 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-08 08:40:53,549 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 73 [2025-02-08 08:40:53,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 73 transitions, 277 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 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 08:40:53,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:53,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 73 [2025-02-08 08:40:53,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:57,541 INFO L124 PetriNetUnfolderBase]: 47888/66219 cut-off events. [2025-02-08 08:40:57,542 INFO L125 PetriNetUnfolderBase]: For 6203/6203 co-relation queries the response was YES. [2025-02-08 08:40:57,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159075 conditions, 66219 events. 47888/66219 cut-off events. For 6203/6203 co-relation queries the response was YES. Maximal size of possible extension queue 2983. Compared 469952 event pairs, 21519 based on Foata normal form. 0/45516 useless extension candidates. Maximal degree in co-relation 111696. Up to 27738 conditions per place. [2025-02-08 08:40:57,854 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 146 selfloop transitions, 10 changer transitions 0/164 dead transitions. [2025-02-08 08:40:57,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 164 transitions, 857 flow [2025-02-08 08:40:57,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:40:57,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:40:57,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 257 transitions. [2025-02-08 08:40:57,856 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.58675799086758 [2025-02-08 08:40:57,856 INFO L175 Difference]: Start difference. First operand has 80 places, 73 transitions, 277 flow. Second operand 6 states and 257 transitions. [2025-02-08 08:40:57,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 164 transitions, 857 flow [2025-02-08 08:40:57,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 164 transitions, 853 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:40:57,867 INFO L231 Difference]: Finished difference. Result has 87 places, 75 transitions, 316 flow [2025-02-08 08:40:57,867 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=316, PETRI_PLACES=87, PETRI_TRANSITIONS=75} [2025-02-08 08:40:57,867 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 11 predicate places. [2025-02-08 08:40:57,867 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 75 transitions, 316 flow [2025-02-08 08:40:57,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 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 08:40:57,868 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:57,868 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:57,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-02-08 08:40:57,868 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-08 08:40:57,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:57,868 INFO L85 PathProgramCache]: Analyzing trace with hash -447898264, now seen corresponding path program 1 times [2025-02-08 08:40:57,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:57,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025261468] [2025-02-08 08:40:57,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:57,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:57,873 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 08:40:57,881 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:40:57,881 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:57,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:40:57,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:57,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025261468] [2025-02-08 08:40:57,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025261468] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:57,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:57,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:40:57,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392534200] [2025-02-08 08:40:57,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:57,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:40:57,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:57,951 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:40:57,951 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:40:57,969 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2025-02-08 08:40:57,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 75 transitions, 316 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 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 08:40:57,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:57,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2025-02-08 08:40:57,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:00,670 INFO L124 PetriNetUnfolderBase]: 32382/46231 cut-off events. [2025-02-08 08:41:00,671 INFO L125 PetriNetUnfolderBase]: For 13509/13509 co-relation queries the response was YES. [2025-02-08 08:41:00,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113997 conditions, 46231 events. 32382/46231 cut-off events. For 13509/13509 co-relation queries the response was YES. Maximal size of possible extension queue 1981. Compared 338048 event pairs, 30412 based on Foata normal form. 0/35363 useless extension candidates. Maximal degree in co-relation 75709. Up to 44287 conditions per place. [2025-02-08 08:41:00,907 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 57 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2025-02-08 08:41:00,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 73 transitions, 436 flow [2025-02-08 08:41:00,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:41:00,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:41:00,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2025-02-08 08:41:00,908 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36164383561643837 [2025-02-08 08:41:00,908 INFO L175 Difference]: Start difference. First operand has 87 places, 75 transitions, 316 flow. Second operand 5 states and 132 transitions. [2025-02-08 08:41:00,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 73 transitions, 436 flow [2025-02-08 08:41:00,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 73 transitions, 434 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:41:00,930 INFO L231 Difference]: Finished difference. Result has 88 places, 73 transitions, 320 flow [2025-02-08 08:41:00,931 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=88, PETRI_TRANSITIONS=73} [2025-02-08 08:41:00,931 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 12 predicate places. [2025-02-08 08:41:00,931 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 73 transitions, 320 flow [2025-02-08 08:41:00,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 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 08:41:00,931 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:00,931 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:00,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-08 08:41:00,932 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-08 08:41:00,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:00,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1534127809, now seen corresponding path program 1 times [2025-02-08 08:41:00,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:00,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763330938] [2025-02-08 08:41:00,932 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:00,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:00,938 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 08:41:00,943 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:41:00,943 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:00,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:01,009 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 08:41:01,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:01,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763330938] [2025-02-08 08:41:01,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763330938] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:01,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:01,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:41:01,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224096957] [2025-02-08 08:41:01,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:01,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:41:01,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:01,011 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:41:01,011 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:41:01,040 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2025-02-08 08:41:01,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 73 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 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 08:41:01,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:01,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2025-02-08 08:41:01,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:03,772 INFO L124 PetriNetUnfolderBase]: 28587/40912 cut-off events. [2025-02-08 08:41:03,773 INFO L125 PetriNetUnfolderBase]: For 12088/12088 co-relation queries the response was YES. [2025-02-08 08:41:03,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99550 conditions, 40912 events. 28587/40912 cut-off events. For 12088/12088 co-relation queries the response was YES. Maximal size of possible extension queue 1739. Compared 295800 event pairs, 26689 based on Foata normal form. 0/32229 useless extension candidates. Maximal degree in co-relation 64138. Up to 39166 conditions per place. [2025-02-08 08:41:03,989 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 56 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2025-02-08 08:41:03,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 72 transitions, 442 flow [2025-02-08 08:41:03,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:41:03,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:41:03,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2025-02-08 08:41:03,990 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3561643835616438 [2025-02-08 08:41:03,990 INFO L175 Difference]: Start difference. First operand has 88 places, 73 transitions, 320 flow. Second operand 5 states and 130 transitions. [2025-02-08 08:41:03,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 72 transitions, 442 flow [2025-02-08 08:41:04,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 72 transitions, 431 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:41:04,014 INFO L231 Difference]: Finished difference. Result has 88 places, 72 transitions, 319 flow [2025-02-08 08:41:04,015 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=319, PETRI_PLACES=88, PETRI_TRANSITIONS=72} [2025-02-08 08:41:04,015 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 12 predicate places. [2025-02-08 08:41:04,015 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 72 transitions, 319 flow [2025-02-08 08:41:04,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 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 08:41:04,015 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:04,015 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:04,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-02-08 08:41:04,016 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-08 08:41:04,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:04,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1534127808, now seen corresponding path program 1 times [2025-02-08 08:41:04,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:04,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651132067] [2025-02-08 08:41:04,016 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:04,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:04,021 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 08:41:04,026 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:41:04,026 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:04,026 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:04,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:04,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:04,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651132067] [2025-02-08 08:41:04,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651132067] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:04,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:04,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 08:41:04,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146229664] [2025-02-08 08:41:04,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:04,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:41:04,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:04,161 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:41:04,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-08 08:41:04,168 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 73 [2025-02-08 08:41:04,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 72 transitions, 319 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 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 08:41:04,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:04,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 73 [2025-02-08 08:41:04,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand