./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows 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/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-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 ! overflow) ) --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 14:12:35,821 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 14:12:35,890 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2025-02-08 14:12:35,897 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 14:12:35,902 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 14:12:35,923 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 14:12:35,925 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 14:12:35,925 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 14:12:35,926 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 14:12:35,926 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 14:12:35,927 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 14:12:35,927 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 14:12:35,927 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 14:12:35,927 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 14:12:35,927 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 14:12:35,927 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 14:12:35,928 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-08 14:12:35,928 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 14:12:35,928 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 14:12:35,928 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 14:12:35,928 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 14:12:35,928 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-08 14:12:35,928 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 14:12:35,929 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-08 14:12:35,929 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-02-08 14:12:35,929 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 14:12:35,929 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 14:12:35,929 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-08 14:12:35,929 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 14:12:35,929 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 14:12:35,929 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 14:12:35,930 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 14:12:35,930 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 14:12:35,930 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 14:12:35,930 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 14:12:35,930 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 14:12:35,930 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 14:12:35,931 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-08 14:12:35,931 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-08 14:12:35,931 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 14:12:35,931 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 14:12:35,931 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 14:12:35,931 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 14:12:35,931 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 14:12:35,931 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 14:12:35,931 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 ! overflow) ) 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 14:12:36,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 14:12:36,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 14:12:36,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 14:12:36,241 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 14:12:36,242 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 14:12:36,243 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2025-02-08 14:12:37,574 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c34820b59/7853fffa73e547a4ae978932a077069a/FLAG7346aa42e [2025-02-08 14:12:37,852 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 14:12:37,853 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2025-02-08 14:12:37,863 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c34820b59/7853fffa73e547a4ae978932a077069a/FLAG7346aa42e [2025-02-08 14:12:38,145 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c34820b59/7853fffa73e547a4ae978932a077069a [2025-02-08 14:12:38,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 14:12:38,148 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 14:12:38,149 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 14:12:38,149 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 14:12:38,153 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 14:12:38,154 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 02:12:38" (1/1) ... [2025-02-08 14:12:38,155 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14d46e12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 02:12:38, skipping insertion in model container [2025-02-08 14:12:38,155 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 02:12:38" (1/1) ... [2025-02-08 14:12:38,179 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 14:12:38,333 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 14:12:38,343 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 14:12:38,370 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 14:12:38,384 INFO L204 MainTranslator]: Completed translation [2025-02-08 14:12:38,385 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 02:12:38 WrapperNode [2025-02-08 14:12:38,385 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 14:12:38,386 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 14:12:38,386 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 14:12:38,386 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 14:12:38,392 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 02:12:38" (1/1) ... [2025-02-08 14:12:38,409 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 02:12:38" (1/1) ... [2025-02-08 14:12:38,448 INFO L138 Inliner]: procedures = 26, calls = 64, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 365 [2025-02-08 14:12:38,448 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 14:12:38,453 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 14:12:38,453 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 14:12:38,453 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 14:12:38,462 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 02:12:38" (1/1) ... [2025-02-08 14:12:38,463 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 02:12:38" (1/1) ... [2025-02-08 14:12:38,471 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 02:12:38" (1/1) ... [2025-02-08 14:12:38,503 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 14:12:38,503 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 02:12:38" (1/1) ... [2025-02-08 14:12:38,503 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 02:12:38" (1/1) ... [2025-02-08 14:12:38,516 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 02:12:38" (1/1) ... [2025-02-08 14:12:38,522 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 02:12:38" (1/1) ... [2025-02-08 14:12:38,523 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 02:12:38" (1/1) ... [2025-02-08 14:12:38,528 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 02:12:38" (1/1) ... [2025-02-08 14:12:38,530 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 14:12:38,535 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 14:12:38,535 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 14:12:38,535 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 14:12:38,536 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 02:12:38" (1/1) ... [2025-02-08 14:12:38,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 14:12:38,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 14:12:38,574 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 14:12:38,581 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 14:12:38,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 14:12:38,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 14:12:38,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 14:12:38,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 14:12:38,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 14:12:38,601 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 14:12:38,601 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 14:12:38,601 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 14:12:38,602 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 14:12:38,602 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-08 14:12:38,602 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-08 14:12:38,602 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-02-08 14:12:38,602 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-02-08 14:12:38,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 14:12:38,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 14:12:38,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-08 14:12:38,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-08 14:12:38,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 14:12:38,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 14:12:38,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 14:12:38,604 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 14:12:38,732 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 14:12:38,734 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 14:12:39,041 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L97: [2025-02-08 14:12:39,043 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 14:12:39,044 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L95: havoc #t~ret11#1; [2025-02-08 14:12:39,044 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L95-1: havoc #t~mem10#1; [2025-02-08 14:12:39,044 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L95-2: ~total~0 := #t~ret11#1; [2025-02-08 14:12:39,044 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 14:12:39,044 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L95-4: havoc plus_#in~a#1, plus_#in~b#1; [2025-02-08 14:12:39,044 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L95-5: havoc plus_#t~short35#1, plus_#t~short36#1, plus_~a#1, plus_~b#1; [2025-02-08 14:12:39,044 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L95-6: #t~ret11#1 := plus_#res#1; [2025-02-08 14:12:39,044 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L100: [2025-02-08 14:12:39,045 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L96: havoc #t~post12#1; [2025-02-08 14:12:39,045 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L96-1: assume 1 + #t~post12#1 <= 2147483647; [2025-02-08 14:12:39,045 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L96-1: assume !(1 + #t~post12#1 <= 2147483647); [2025-02-08 14:12:39,045 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L96-2: ~q1_front~0 := 1 + #t~post12#1; [2025-02-08 14:12:39,045 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L96-3: assume 1 + #t~post12#1 >= -2147483648; [2025-02-08 14:12:39,045 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L96-3: assume !(1 + #t~post12#1 >= -2147483648); [2025-02-08 14:12:39,045 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L96-4: #t~post12#1 := ~q1_front~0; [2025-02-08 14:12:39,122 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L118: [2025-02-08 14:12:39,123 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L114: havoc #t~post15#1; [2025-02-08 14:12:39,123 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L114-1: assume 1 + #t~post15#1 <= 2147483647; [2025-02-08 14:12:39,123 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L114-1: assume !(1 + #t~post15#1 <= 2147483647); [2025-02-08 14:12:39,123 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L114-2: ~q2_front~0 := 1 + #t~post15#1; [2025-02-08 14:12:39,123 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L114-3: assume 1 + #t~post15#1 >= -2147483648; [2025-02-08 14:12:39,123 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L114-3: assume !(1 + #t~post15#1 >= -2147483648); [2025-02-08 14:12:39,124 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L114-4: #t~post15#1 := ~q2_front~0; [2025-02-08 14:12:39,124 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L115: [2025-02-08 14:12:39,124 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 14:12:39,124 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L113: havoc #t~ret14#1; [2025-02-08 14:12:39,124 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L113-1: havoc #t~mem13#1; [2025-02-08 14:12:39,124 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L113-2: ~total~0 := #t~ret14#1; [2025-02-08 14:12:39,124 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 14:12:39,124 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L113-4: havoc plus_#in~a#1, plus_#in~b#1; [2025-02-08 14:12:39,124 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L113-5: havoc plus_#t~short35#1, plus_#t~short36#1, plus_~a#1, plus_~b#1; [2025-02-08 14:12:39,124 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L113-6: #t~ret14#1 := plus_#res#1; [2025-02-08 14:12:39,352 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 14:12:39,352 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 14:12:39,747 WARN L149 AtomicBlockAnalyzer]: Unexpected successor node of atomic block begin: L170 is not an error location. [2025-02-08 14:12:39,748 WARN L149 AtomicBlockAnalyzer]: Unexpected successor node of atomic block begin: L170 is not an error location. [2025-02-08 14:12:39,749 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 14:12:39,750 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 14:12:39,750 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 02:12:39 BoogieIcfgContainer [2025-02-08 14:12:39,751 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 14:12:39,753 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 14:12:39,753 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 14:12:39,757 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 14:12:39,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 02:12:38" (1/3) ... [2025-02-08 14:12:39,757 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d0a2049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 02:12:39, skipping insertion in model container [2025-02-08 14:12:39,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 02:12:38" (2/3) ... [2025-02-08 14:12:39,758 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d0a2049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 02:12:39, skipping insertion in model container [2025-02-08 14:12:39,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 02:12:39" (3/3) ... [2025-02-08 14:12:39,759 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2025-02-08 14:12:39,772 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 14:12:39,773 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-buffer-series2.wvr.c that has 5 procedures, 76 locations, 1 initial locations, 7 loop locations, and 32 error locations. [2025-02-08 14:12:39,773 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 14:12:39,935 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-02-08 14:12:39,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 80 transitions, 188 flow [2025-02-08 14:12:40,002 INFO L124 PetriNetUnfolderBase]: 5/76 cut-off events. [2025-02-08 14:12:40,005 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-08 14:12:40,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 76 events. 5/76 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 250 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2025-02-08 14:12:40,013 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 80 transitions, 188 flow [2025-02-08 14:12:40,016 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 74 transitions, 169 flow [2025-02-08 14:12:40,027 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 14:12:40,040 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=LoopHeads, 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;@6ea1a155, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 14:12:40,041 INFO L334 AbstractCegarLoop]: Starting to check reachability of 54 error locations. [2025-02-08 14:12:40,044 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 14:12:40,044 INFO L124 PetriNetUnfolderBase]: 1/5 cut-off events. [2025-02-08 14:12:40,045 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 14:12:40,045 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 14:12:40,045 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 14:12:40,046 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 51 more)] === [2025-02-08 14:12:40,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 14:12:40,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1036622, now seen corresponding path program 1 times [2025-02-08 14:12:40,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 14:12:40,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27575480] [2025-02-08 14:12:40,060 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 14:12:40,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 14:12:40,130 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 14:12:40,161 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 14:12:40,162 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 14:12:40,162 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 14:12:40,333 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 14:12:40,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 14:12:40,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27575480] [2025-02-08 14:12:40,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27575480] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 14:12:40,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 14:12:40,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 14:12:40,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496663112] [2025-02-08 14:12:40,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 14:12:40,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 14:12:40,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 14:12:40,367 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 14:12:40,367 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 14:12:40,402 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 80 [2025-02-08 14:12:40,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 74 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 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 14:12:40,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 14:12:40,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 80 [2025-02-08 14:12:40,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 14:12:44,230 INFO L124 PetriNetUnfolderBase]: 20942/28303 cut-off events. [2025-02-08 14:12:44,231 INFO L125 PetriNetUnfolderBase]: For 827/827 co-relation queries the response was YES. [2025-02-08 14:12:44,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57224 conditions, 28303 events. 20942/28303 cut-off events. For 827/827 co-relation queries the response was YES. Maximal size of possible extension queue 1909. Compared 184184 event pairs, 18972 based on Foata normal form. 3/16480 useless extension candidates. Maximal degree in co-relation 52896. Up to 27618 conditions per place. [2025-02-08 14:12:44,462 INFO L140 encePairwiseOnDemand]: 55/80 looper letters, 53 selfloop transitions, 10 changer transitions 0/74 dead transitions. [2025-02-08 14:12:44,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 74 transitions, 295 flow [2025-02-08 14:12:44,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 14:12:44,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 14:12:44,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2025-02-08 14:12:44,477 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43125 [2025-02-08 14:12:44,478 INFO L175 Difference]: Start difference. First operand has 82 places, 74 transitions, 169 flow. Second operand 4 states and 138 transitions. [2025-02-08 14:12:44,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 74 transitions, 295 flow [2025-02-08 14:12:44,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 74 transitions, 282 flow, removed 0 selfloop flow, removed 7 redundant places. [2025-02-08 14:12:44,717 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 226 flow [2025-02-08 14:12:44,720 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2025-02-08 14:12:44,725 INFO L279 CegarLoopForPetriNet]: 82 programPoint places, -10 predicate places. [2025-02-08 14:12:44,725 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 226 flow [2025-02-08 14:12:44,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 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 14:12:44,725 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 14:12:44,726 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-02-08 14:12:44,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 14:12:44,726 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 51 more)] === [2025-02-08 14:12:44,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 14:12:44,727 INFO L85 PathProgramCache]: Analyzing trace with hash 818199477, now seen corresponding path program 1 times [2025-02-08 14:12:44,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 14:12:44,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473661709] [2025-02-08 14:12:44,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 14:12:44,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 14:12:44,747 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 14:12:44,760 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 14:12:44,760 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 14:12:44,760 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 14:12:44,921 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 14:12:44,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 14:12:44,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473661709] [2025-02-08 14:12:44,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473661709] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 14:12:44,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702284813] [2025-02-08 14:12:44,922 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 14:12:44,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 14:12:44,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 14:12:44,926 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 14:12:44,928 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 14:12:45,010 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 14:12:45,025 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 14:12:45,025 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 14:12:45,025 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 14:12:45,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-08 14:12:45,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 14:12:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 14:12:45,078 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 14:12:45,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702284813] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 14:12:45,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 14:12:45,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-02-08 14:12:45,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300765579] [2025-02-08 14:12:45,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 14:12:45,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 14:12:45,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 14:12:45,080 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 14:12:45,081 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-08 14:12:45,114 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 80 [2025-02-08 14:12:45,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 226 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 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 14:12:45,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 14:12:45,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 80 [2025-02-08 14:12:45,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 14:12:48,004 INFO L124 PetriNetUnfolderBase]: 20942/28300 cut-off events. [2025-02-08 14:12:48,005 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2025-02-08 14:12:48,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56680 conditions, 28300 events. 20942/28300 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 1909. Compared 184484 event pairs, 18972 based on Foata normal form. 3/16482 useless extension candidates. Maximal degree in co-relation 56607. Up to 27603 conditions per place. [2025-02-08 14:12:48,189 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 43 selfloop transitions, 17 changer transitions 0/71 dead transitions. [2025-02-08 14:12:48,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 71 transitions, 334 flow [2025-02-08 14:12:48,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 14:12:48,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 14:12:48,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2025-02-08 14:12:48,191 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31875 [2025-02-08 14:12:48,191 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 226 flow. Second operand 6 states and 153 transitions. [2025-02-08 14:12:48,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 71 transitions, 334 flow [2025-02-08 14:12:48,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 71 transitions, 334 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-08 14:12:48,194 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 248 flow [2025-02-08 14:12:48,194 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=248, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2025-02-08 14:12:48,195 INFO L279 CegarLoopForPetriNet]: 82 programPoint places, -8 predicate places. [2025-02-08 14:12:48,195 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 248 flow [2025-02-08 14:12:48,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 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 14:12:48,195 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 14:12:48,195 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2025-02-08 14:12:48,204 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 14:12:48,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 14:12:48,399 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 51 more)] === [2025-02-08 14:12:48,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 14:12:48,400 INFO L85 PathProgramCache]: Analyzing trace with hash -405619019, now seen corresponding path program 1 times [2025-02-08 14:12:48,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 14:12:48,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859564457] [2025-02-08 14:12:48,400 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 14:12:48,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 14:12:48,412 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-08 14:12:48,425 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-08 14:12:48,425 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 14:12:48,425 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 14:12:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 14:12:48,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 14:12:48,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859564457] [2025-02-08 14:12:48,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859564457] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 14:12:48,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105563836] [2025-02-08 14:12:48,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 14:12:48,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 14:12:48,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 14:12:48,531 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 14:12:48,532 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 14:12:48,618 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-08 14:12:48,630 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-08 14:12:48,631 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 14:12:48,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 14:12:48,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-08 14:12:48,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 14:12:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 14:12:48,663 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 14:12:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 14:12:48,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105563836] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 14:12:48,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 14:12:48,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-02-08 14:12:48,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137780864] [2025-02-08 14:12:48,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 14:12:48,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-08 14:12:48,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 14:12:48,706 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-08 14:12:48,706 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-02-08 14:12:48,744 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 80 [2025-02-08 14:12:48,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 248 flow. Second operand has 12 states, 12 states have (on average 16.083333333333332) internal successors, (193), 12 states have internal predecessors, (193), 0 states have call successors, (0), 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 14:12:48,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 14:12:48,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 80 [2025-02-08 14:12:48,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 14:12:51,390 INFO L124 PetriNetUnfolderBase]: 20951/28336 cut-off events. [2025-02-08 14:12:51,390 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2025-02-08 14:12:51,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56821 conditions, 28336 events. 20951/28336 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 1909. Compared 184525 event pairs, 18972 based on Foata normal form. 9/16524 useless extension candidates. Maximal degree in co-relation 56609. Up to 27618 conditions per place. [2025-02-08 14:12:51,493 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 50 selfloop transitions, 37 changer transitions 0/98 dead transitions. [2025-02-08 14:12:51,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 98 transitions, 596 flow [2025-02-08 14:12:51,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 14:12:51,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 14:12:51,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2025-02-08 14:12:51,496 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3075 [2025-02-08 14:12:51,496 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 248 flow. Second operand 10 states and 246 transitions. [2025-02-08 14:12:51,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 98 transitions, 596 flow [2025-02-08 14:12:51,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 98 transitions, 513 flow, removed 16 selfloop flow, removed 5 redundant places. [2025-02-08 14:12:51,502 INFO L231 Difference]: Finished difference. Result has 81 places, 98 transitions, 463 flow [2025-02-08 14:12:51,503 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=463, PETRI_PLACES=81, PETRI_TRANSITIONS=98} [2025-02-08 14:12:51,503 INFO L279 CegarLoopForPetriNet]: 82 programPoint places, -1 predicate places. [2025-02-08 14:12:51,503 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 98 transitions, 463 flow [2025-02-08 14:12:51,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.083333333333332) internal successors, (193), 12 states have internal predecessors, (193), 0 states have call successors, (0), 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 14:12:51,503 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 14:12:51,504 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 14:12:51,512 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 14:12:51,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 14:12:51,704 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 51 more)] === [2025-02-08 14:12:51,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 14:12:51,705 INFO L85 PathProgramCache]: Analyzing trace with hash -2053296006, now seen corresponding path program 1 times [2025-02-08 14:12:51,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 14:12:51,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030960321] [2025-02-08 14:12:51,705 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 14:12:51,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 14:12:51,715 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 14:12:51,724 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 14:12:51,724 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 14:12:51,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 14:12:51,819 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 14:12:51,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 14:12:51,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030960321] [2025-02-08 14:12:51,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030960321] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 14:12:51,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 14:12:51,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 14:12:51,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104837607] [2025-02-08 14:12:51,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 14:12:51,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 14:12:51,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 14:12:51,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 14:12:51,825 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 14:12:51,825 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 80 [2025-02-08 14:12:51,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 98 transitions, 463 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 14:12:51,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 14:12:51,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 80 [2025-02-08 14:12:51,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 14:12:54,814 INFO L124 PetriNetUnfolderBase]: 28830/39471 cut-off events. [2025-02-08 14:12:54,814 INFO L125 PetriNetUnfolderBase]: For 220/220 co-relation queries the response was YES. [2025-02-08 14:12:54,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78662 conditions, 39471 events. 28830/39471 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 2270. Compared 267107 event pairs, 9618 based on Foata normal form. 0/24523 useless extension candidates. Maximal degree in co-relation 78564. Up to 24336 conditions per place. [2025-02-08 14:12:55,009 INFO L140 encePairwiseOnDemand]: 76/80 looper letters, 115 selfloop transitions, 2 changer transitions 0/131 dead transitions. [2025-02-08 14:12:55,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 131 transitions, 770 flow [2025-02-08 14:12:55,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 14:12:55,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 14:12:55,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2025-02-08 14:12:55,011 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2025-02-08 14:12:55,011 INFO L175 Difference]: Start difference. First operand has 81 places, 98 transitions, 463 flow. Second operand 3 states and 146 transitions. [2025-02-08 14:12:55,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 131 transitions, 770 flow [2025-02-08 14:12:55,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 131 transitions, 733 flow, removed 9 selfloop flow, removed 2 redundant places. [2025-02-08 14:12:55,015 INFO L231 Difference]: Finished difference. Result has 82 places, 99 transitions, 440 flow [2025-02-08 14:12:55,016 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=440, PETRI_PLACES=82, PETRI_TRANSITIONS=99} [2025-02-08 14:12:55,016 INFO L279 CegarLoopForPetriNet]: 82 programPoint places, 0 predicate places. [2025-02-08 14:12:55,017 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 99 transitions, 440 flow [2025-02-08 14:12:55,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 14:12:55,017 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 14:12:55,017 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 14:12:55,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-08 14:12:55,017 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 51 more)] === [2025-02-08 14:12:55,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 14:12:55,018 INFO L85 PathProgramCache]: Analyzing trace with hash 2021709910, now seen corresponding path program 1 times [2025-02-08 14:12:55,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 14:12:55,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144802551] [2025-02-08 14:12:55,018 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 14:12:55,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 14:12:55,028 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 14:12:55,046 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 14:12:55,046 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 14:12:55,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 14:12:55,210 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 14:12:55,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 14:12:55,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144802551] [2025-02-08 14:12:55,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144802551] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 14:12:55,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 14:12:55,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 14:12:55,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249870831] [2025-02-08 14:12:55,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 14:12:55,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 14:12:55,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 14:12:55,212 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 14:12:55,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 14:12:55,212 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 80 [2025-02-08 14:12:55,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 99 transitions, 440 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 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 14:12:55,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 14:12:55,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 80 [2025-02-08 14:12:55,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 14:12:59,140 INFO L124 PetriNetUnfolderBase]: 33423/45825 cut-off events. [2025-02-08 14:12:59,140 INFO L125 PetriNetUnfolderBase]: For 2718/2718 co-relation queries the response was YES. [2025-02-08 14:12:59,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97970 conditions, 45825 events. 33423/45825 cut-off events. For 2718/2718 co-relation queries the response was YES. Maximal size of possible extension queue 2285. Compared 312156 event pairs, 30884 based on Foata normal form. 830/30608 useless extension candidates. Maximal degree in co-relation 97847. Up to 38087 conditions per place. [2025-02-08 14:12:59,386 INFO L140 encePairwiseOnDemand]: 66/80 looper letters, 119 selfloop transitions, 9 changer transitions 1/143 dead transitions. [2025-02-08 14:12:59,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 143 transitions, 866 flow [2025-02-08 14:12:59,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 14:12:59,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 14:12:59,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 199 transitions. [2025-02-08 14:12:59,387 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4975 [2025-02-08 14:12:59,387 INFO L175 Difference]: Start difference. First operand has 82 places, 99 transitions, 440 flow. Second operand 5 states and 199 transitions. [2025-02-08 14:12:59,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 143 transitions, 866 flow [2025-02-08 14:12:59,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 143 transitions, 863 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 14:12:59,400 INFO L231 Difference]: Finished difference. Result has 87 places, 101 transitions, 495 flow [2025-02-08 14:12:59,400 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=495, PETRI_PLACES=87, PETRI_TRANSITIONS=101} [2025-02-08 14:12:59,401 INFO L279 CegarLoopForPetriNet]: 82 programPoint places, 5 predicate places. [2025-02-08 14:12:59,401 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 101 transitions, 495 flow [2025-02-08 14:12:59,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 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 14:12:59,401 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 14:12:59,401 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 14:12:59,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-08 14:12:59,402 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 51 more)] === [2025-02-08 14:12:59,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 14:12:59,402 INFO L85 PathProgramCache]: Analyzing trace with hash -816003955, now seen corresponding path program 1 times [2025-02-08 14:12:59,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 14:12:59,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450972084] [2025-02-08 14:12:59,402 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 14:12:59,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 14:12:59,411 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 14:12:59,422 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 14:12:59,422 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 14:12:59,422 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 14:12:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 14:12:59,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 14:12:59,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450972084] [2025-02-08 14:12:59,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450972084] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 14:12:59,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 14:12:59,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 14:12:59,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854311238] [2025-02-08 14:12:59,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 14:12:59,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 14:12:59,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 14:12:59,479 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 14:12:59,479 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 14:12:59,480 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 80 [2025-02-08 14:12:59,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 101 transitions, 495 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 14:12:59,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 14:12:59,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 80 [2025-02-08 14:12:59,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 14:13:03,451 INFO L124 PetriNetUnfolderBase]: 29635/40731 cut-off events. [2025-02-08 14:13:03,452 INFO L125 PetriNetUnfolderBase]: For 4649/4649 co-relation queries the response was YES. [2025-02-08 14:13:03,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94429 conditions, 40731 events. 29635/40731 cut-off events. For 4649/4649 co-relation queries the response was YES. Maximal size of possible extension queue 2128. Compared 278386 event pairs, 27242 based on Foata normal form. 0/26614 useless extension candidates. Maximal degree in co-relation 94303. Up to 39483 conditions per place. [2025-02-08 14:13:03,662 INFO L140 encePairwiseOnDemand]: 78/80 looper letters, 85 selfloop transitions, 1 changer transitions 0/100 dead transitions. [2025-02-08 14:13:03,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 100 transitions, 663 flow [2025-02-08 14:13:03,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 14:13:03,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 14:13:03,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2025-02-08 14:13:03,664 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4625 [2025-02-08 14:13:03,664 INFO L175 Difference]: Start difference. First operand has 87 places, 101 transitions, 495 flow. Second operand 3 states and 111 transitions. [2025-02-08 14:13:03,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 100 transitions, 663 flow [2025-02-08 14:13:03,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 100 transitions, 655 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-02-08 14:13:03,683 INFO L231 Difference]: Finished difference. Result has 87 places, 100 transitions, 485 flow [2025-02-08 14:13:03,684 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=485, PETRI_PLACES=87, PETRI_TRANSITIONS=100} [2025-02-08 14:13:03,685 INFO L279 CegarLoopForPetriNet]: 82 programPoint places, 5 predicate places. [2025-02-08 14:13:03,686 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 100 transitions, 485 flow [2025-02-08 14:13:03,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 14:13:03,686 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 14:13:03,686 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 14:13:03,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-08 14:13:03,687 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 51 more)] === [2025-02-08 14:13:03,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 14:13:03,687 INFO L85 PathProgramCache]: Analyzing trace with hash -816003954, now seen corresponding path program 1 times [2025-02-08 14:13:03,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 14:13:03,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254481020] [2025-02-08 14:13:03,687 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 14:13:03,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 14:13:03,698 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 14:13:03,709 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 14:13:03,710 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 14:13:03,710 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 14:13:03,762 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 14:13:03,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 14:13:03,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254481020] [2025-02-08 14:13:03,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254481020] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 14:13:03,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559120411] [2025-02-08 14:13:03,762 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 14:13:03,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 14:13:03,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 14:13:03,765 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 14:13:03,768 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 14:13:03,849 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 14:13:03,874 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 14:13:03,874 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 14:13:03,874 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 14:13:03,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-08 14:13:03,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 14:13:03,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 14:13:03,911 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 14:13:03,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559120411] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 14:13:03,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 14:13:03,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [2] total 5 [2025-02-08 14:13:03,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057372259] [2025-02-08 14:13:03,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 14:13:03,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 14:13:03,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 14:13:03,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 14:13:03,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-08 14:13:03,913 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 80 [2025-02-08 14:13:03,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 100 transitions, 485 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 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 14:13:03,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 14:13:03,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 80 [2025-02-08 14:13:03,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand