./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/no-overflow.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 16:50:57,509 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 16:50:57,565 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-10-13 16:50:57,570 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 16:50:57,571 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 16:50:57,594 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 16:50:57,595 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 16:50:57,595 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 16:50:57,595 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 16:50:57,595 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 16:50:57,596 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 16:50:57,596 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 16:50:57,596 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 16:50:57,597 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 16:50:57,597 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 16:50:57,597 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 16:50:57,597 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 16:50:57,598 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 16:50:57,598 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 16:50:57,598 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 16:50:57,598 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 16:50:57,602 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 16:50:57,603 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 16:50:57,603 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 16:50:57,603 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 16:50:57,603 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-10-13 16:50:57,603 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 16:50:57,604 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 16:50:57,604 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 16:50:57,604 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 16:50:57,604 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 16:50:57,604 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 16:50:57,604 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 16:50:57,604 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 16:50:57,605 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 16:50:57,605 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 16:50:57,605 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 16:50:57,605 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 16:50:57,605 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 16:50:57,605 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 16:50:57,605 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 16:50:57,607 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 16:50:57,607 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 16:50:57,608 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 16:50:57,608 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c [2024-10-13 16:50:57,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 16:50:57,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 16:50:57,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 16:50:57,850 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 16:50:57,850 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 16:50:57,851 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2024-10-13 16:50:59,050 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 16:50:59,192 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 16:50:59,193 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2024-10-13 16:50:59,203 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5adc4ea5/4b0fe2725c214cfe92c6b026659ddcce/FLAG39061a555 [2024-10-13 16:50:59,613 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5adc4ea5/4b0fe2725c214cfe92c6b026659ddcce [2024-10-13 16:50:59,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 16:50:59,616 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 16:50:59,617 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 16:50:59,617 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 16:50:59,621 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 16:50:59,622 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:50:59" (1/1) ... [2024-10-13 16:50:59,622 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18df4625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:59, skipping insertion in model container [2024-10-13 16:50:59,622 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:50:59" (1/1) ... [2024-10-13 16:50:59,648 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 16:50:59,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 16:50:59,803 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 16:50:59,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 16:50:59,839 INFO L204 MainTranslator]: Completed translation [2024-10-13 16:50:59,839 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:59 WrapperNode [2024-10-13 16:50:59,839 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 16:50:59,840 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 16:50:59,840 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 16:50:59,841 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 16:50:59,846 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:59" (1/1) ... [2024-10-13 16:50:59,852 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:59" (1/1) ... [2024-10-13 16:50:59,876 INFO L138 Inliner]: procedures = 26, calls = 68, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 390 [2024-10-13 16:50:59,876 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 16:50:59,877 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 16:50:59,877 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 16:50:59,877 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 16:50:59,889 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:59" (1/1) ... [2024-10-13 16:50:59,889 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:59" (1/1) ... [2024-10-13 16:50:59,892 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:59" (1/1) ... [2024-10-13 16:50:59,911 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]. [2024-10-13 16:50:59,911 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:59" (1/1) ... [2024-10-13 16:50:59,915 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:59" (1/1) ... [2024-10-13 16:50:59,929 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:59" (1/1) ... [2024-10-13 16:50:59,934 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:59" (1/1) ... [2024-10-13 16:50:59,936 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:59" (1/1) ... [2024-10-13 16:50:59,937 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:59" (1/1) ... [2024-10-13 16:50:59,944 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 16:50:59,945 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 16:50:59,945 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 16:50:59,945 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 16:50:59,946 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:59" (1/1) ... [2024-10-13 16:50:59,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 16:50:59,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 16:50:59,983 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 16:50:59,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 16:51:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 16:51:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 16:51:00,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 16:51:00,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 16:51:00,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 16:51:00,025 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-13 16:51:00,025 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-13 16:51:00,025 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-13 16:51:00,025 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-13 16:51:00,027 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-13 16:51:00,027 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-13 16:51:00,027 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-10-13 16:51:00,027 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-10-13 16:51:00,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 16:51:00,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 16:51:00,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-13 16:51:00,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-13 16:51:00,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 16:51:00,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 16:51:00,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 16:51:00,030 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 16:51:00,185 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 16:51:00,188 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 16:51:00,681 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 16:51:00,681 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 16:51:01,084 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 16:51:01,084 INFO L314 CfgBuilder]: Removed 7 assume(true) statements. [2024-10-13 16:51:01,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:51:01 BoogieIcfgContainer [2024-10-13 16:51:01,085 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 16:51:01,086 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 16:51:01,086 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 16:51:01,089 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 16:51:01,089 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:50:59" (1/3) ... [2024-10-13 16:51:01,089 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@581cbd8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:51:01, skipping insertion in model container [2024-10-13 16:51:01,089 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:59" (2/3) ... [2024-10-13 16:51:01,090 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@581cbd8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:51:01, skipping insertion in model container [2024-10-13 16:51:01,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:51:01" (3/3) ... [2024-10-13 16:51:01,091 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2024-10-13 16:51:01,103 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 16:51:01,103 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2024-10-13 16:51:01,104 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 16:51:01,201 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-13 16:51:01,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 88 transitions, 204 flow [2024-10-13 16:51:01,265 INFO L124 PetriNetUnfolderBase]: 7/84 cut-off events. [2024-10-13 16:51:01,266 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-13 16:51:01,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 84 events. 7/84 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 276 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2024-10-13 16:51:01,270 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 88 transitions, 204 flow [2024-10-13 16:51:01,274 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 82 transitions, 185 flow [2024-10-13 16:51:01,284 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 16:51:01,289 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;@744ddbf8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 16:51:01,289 INFO L334 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2024-10-13 16:51:01,293 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 16:51:01,293 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-10-13 16:51:01,293 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 16:51:01,293 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 16:51:01,294 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 16:51:01,295 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2024-10-13 16:51:01,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 16:51:01,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1240749, now seen corresponding path program 1 times [2024-10-13 16:51:01,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 16:51:01,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561571941] [2024-10-13 16:51:01,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 16:51:01,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 16:51:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 16:51:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 16:51:01,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 16:51:01,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561571941] [2024-10-13 16:51:01,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561571941] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 16:51:01,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 16:51:01,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 16:51:01,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818228544] [2024-10-13 16:51:01,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 16:51:01,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 16:51:01,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 16:51:01,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 16:51:01,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 16:51:01,632 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 88 [2024-10-13 16:51:01,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 82 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 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) [2024-10-13 16:51:01,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 16:51:01,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 88 [2024-10-13 16:51:01,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 16:51:05,106 INFO L124 PetriNetUnfolderBase]: 24043/32416 cut-off events. [2024-10-13 16:51:05,106 INFO L125 PetriNetUnfolderBase]: For 697/697 co-relation queries the response was YES. [2024-10-13 16:51:05,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64230 conditions, 32416 events. 24043/32416 cut-off events. For 697/697 co-relation queries the response was YES. Maximal size of possible extension queue 3364. Compared 231010 event pairs, 18972 based on Foata normal form. 3/16731 useless extension candidates. Maximal degree in co-relation 59646. Up to 30511 conditions per place. [2024-10-13 16:51:05,331 INFO L140 encePairwiseOnDemand]: 61/88 looper letters, 51 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2024-10-13 16:51:05,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 80 transitions, 303 flow [2024-10-13 16:51:05,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 16:51:05,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 16:51:05,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 170 transitions. [2024-10-13 16:51:05,344 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48295454545454547 [2024-10-13 16:51:05,345 INFO L175 Difference]: Start difference. First operand has 88 places, 82 transitions, 185 flow. Second operand 4 states and 170 transitions. [2024-10-13 16:51:05,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 80 transitions, 303 flow [2024-10-13 16:51:05,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 80 transitions, 290 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-13 16:51:05,562 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 238 flow [2024-10-13 16:51:05,563 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=76, PETRI_TRANSITIONS=80} [2024-10-13 16:51:05,566 INFO L277 CegarLoopForPetriNet]: 88 programPoint places, -12 predicate places. [2024-10-13 16:51:05,567 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 238 flow [2024-10-13 16:51:05,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 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) [2024-10-13 16:51:05,567 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 16:51:05,567 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-10-13 16:51:05,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 16:51:05,567 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2024-10-13 16:51:05,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 16:51:05,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1690314339, now seen corresponding path program 1 times [2024-10-13 16:51:05,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 16:51:05,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111125161] [2024-10-13 16:51:05,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 16:51:05,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 16:51:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 16:51:05,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 16:51:05,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 16:51:05,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111125161] [2024-10-13 16:51:05,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111125161] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 16:51:05,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052318064] [2024-10-13 16:51:05,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 16:51:05,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 16:51:05,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 16:51:05,690 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 16:51:05,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 16:51:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 16:51:05,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-13 16:51:05,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 16:51:05,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 16:51:05,806 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 16:51:05,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052318064] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 16:51:05,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 16:51:05,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-10-13 16:51:05,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644578517] [2024-10-13 16:51:05,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 16:51:05,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 16:51:05,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 16:51:05,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 16:51:05,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-13 16:51:05,839 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 88 [2024-10-13 16:51:05,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 80 transitions, 238 flow. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 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) [2024-10-13 16:51:05,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 16:51:05,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 88 [2024-10-13 16:51:05,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 16:51:08,902 INFO L124 PetriNetUnfolderBase]: 24043/32413 cut-off events. [2024-10-13 16:51:08,902 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-10-13 16:51:08,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63686 conditions, 32413 events. 24043/32413 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 3364. Compared 230725 event pairs, 18972 based on Foata normal form. 3/16733 useless extension candidates. Maximal degree in co-relation 63613. Up to 30496 conditions per place. [2024-10-13 16:51:09,162 INFO L140 encePairwiseOnDemand]: 75/88 looper letters, 41 selfloop transitions, 17 changer transitions 0/77 dead transitions. [2024-10-13 16:51:09,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 77 transitions, 342 flow [2024-10-13 16:51:09,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 16:51:09,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 16:51:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-10-13 16:51:09,166 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3768939393939394 [2024-10-13 16:51:09,167 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 238 flow. Second operand 6 states and 199 transitions. [2024-10-13 16:51:09,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 77 transitions, 342 flow [2024-10-13 16:51:09,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 77 transitions, 342 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 16:51:09,171 INFO L231 Difference]: Finished difference. Result has 78 places, 77 transitions, 260 flow [2024-10-13 16:51:09,171 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=78, PETRI_TRANSITIONS=77} [2024-10-13 16:51:09,173 INFO L277 CegarLoopForPetriNet]: 88 programPoint places, -10 predicate places. [2024-10-13 16:51:09,174 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 77 transitions, 260 flow [2024-10-13 16:51:09,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 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) [2024-10-13 16:51:09,174 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 16:51:09,174 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-10-13 16:51:09,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 16:51:09,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 16:51:09,376 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2024-10-13 16:51:09,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 16:51:09,377 INFO L85 PathProgramCache]: Analyzing trace with hash -860135710, now seen corresponding path program 1 times [2024-10-13 16:51:09,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 16:51:09,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305295449] [2024-10-13 16:51:09,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 16:51:09,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 16:51:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 16:51:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 16:51:09,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 16:51:09,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305295449] [2024-10-13 16:51:09,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305295449] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 16:51:09,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122590166] [2024-10-13 16:51:09,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 16:51:09,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 16:51:09,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 16:51:09,467 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 16:51:09,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 16:51:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 16:51:09,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-13 16:51:09,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 16:51:09,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 16:51:09,575 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 16:51:09,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 16:51:09,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122590166] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 16:51:09,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 16:51:09,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-10-13 16:51:09,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825180493] [2024-10-13 16:51:09,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 16:51:09,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-13 16:51:09,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 16:51:09,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-13 16:51:09,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-10-13 16:51:09,638 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 88 [2024-10-13 16:51:09,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 260 flow. Second operand has 12 states, 12 states have (on average 24.083333333333332) internal successors, (289), 12 states have internal predecessors, (289), 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) [2024-10-13 16:51:09,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 16:51:09,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 88 [2024-10-13 16:51:09,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 16:51:12,205 INFO L124 PetriNetUnfolderBase]: 24052/32449 cut-off events. [2024-10-13 16:51:12,205 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2024-10-13 16:51:12,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63827 conditions, 32449 events. 24052/32449 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 3364. Compared 230929 event pairs, 18972 based on Foata normal form. 9/16775 useless extension candidates. Maximal degree in co-relation 63615. Up to 30511 conditions per place. [2024-10-13 16:51:12,378 INFO L140 encePairwiseOnDemand]: 75/88 looper letters, 48 selfloop transitions, 37 changer transitions 0/104 dead transitions. [2024-10-13 16:51:12,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 104 transitions, 604 flow [2024-10-13 16:51:12,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 16:51:12,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-13 16:51:12,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 324 transitions. [2024-10-13 16:51:12,380 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36818181818181817 [2024-10-13 16:51:12,380 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 260 flow. Second operand 10 states and 324 transitions. [2024-10-13 16:51:12,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 104 transitions, 604 flow [2024-10-13 16:51:12,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 104 transitions, 521 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-10-13 16:51:12,383 INFO L231 Difference]: Finished difference. Result has 85 places, 104 transitions, 475 flow [2024-10-13 16:51:12,383 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=475, PETRI_PLACES=85, PETRI_TRANSITIONS=104} [2024-10-13 16:51:12,384 INFO L277 CegarLoopForPetriNet]: 88 programPoint places, -3 predicate places. [2024-10-13 16:51:12,384 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 104 transitions, 475 flow [2024-10-13 16:51:12,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.083333333333332) internal successors, (289), 12 states have internal predecessors, (289), 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) [2024-10-13 16:51:12,385 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 16:51:12,385 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 16:51:12,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 16:51:12,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-13 16:51:12,586 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2024-10-13 16:51:12,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 16:51:12,586 INFO L85 PathProgramCache]: Analyzing trace with hash -192540888, now seen corresponding path program 1 times [2024-10-13 16:51:12,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 16:51:12,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615874713] [2024-10-13 16:51:12,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 16:51:12,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 16:51:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 16:51:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 16:51:12,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 16:51:12,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615874713] [2024-10-13 16:51:12,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615874713] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 16:51:12,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 16:51:12,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 16:51:12,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394746907] [2024-10-13 16:51:12,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 16:51:12,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 16:51:12,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 16:51:12,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 16:51:12,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 16:51:12,674 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 88 [2024-10-13 16:51:12,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 104 transitions, 475 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2024-10-13 16:51:12,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 16:51:12,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 88 [2024-10-13 16:51:12,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 16:51:16,491 INFO L124 PetriNetUnfolderBase]: 31509/43660 cut-off events. [2024-10-13 16:51:16,491 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2024-10-13 16:51:16,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85419 conditions, 43660 events. 31509/43660 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 3820. Compared 333807 event pairs, 9618 based on Foata normal form. 0/24330 useless extension candidates. Maximal degree in co-relation 85321. Up to 25909 conditions per place. [2024-10-13 16:51:16,728 INFO L140 encePairwiseOnDemand]: 84/88 looper letters, 113 selfloop transitions, 2 changer transitions 0/137 dead transitions. [2024-10-13 16:51:16,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 137 transitions, 778 flow [2024-10-13 16:51:16,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 16:51:16,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 16:51:16,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2024-10-13 16:51:16,730 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-10-13 16:51:16,730 INFO L175 Difference]: Start difference. First operand has 85 places, 104 transitions, 475 flow. Second operand 3 states and 168 transitions. [2024-10-13 16:51:16,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 137 transitions, 778 flow [2024-10-13 16:51:16,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 137 transitions, 741 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-10-13 16:51:16,735 INFO L231 Difference]: Finished difference. Result has 86 places, 105 transitions, 452 flow [2024-10-13 16:51:16,735 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=452, PETRI_PLACES=86, PETRI_TRANSITIONS=105} [2024-10-13 16:51:16,736 INFO L277 CegarLoopForPetriNet]: 88 programPoint places, -2 predicate places. [2024-10-13 16:51:16,737 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 105 transitions, 452 flow [2024-10-13 16:51:16,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2024-10-13 16:51:16,737 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 16:51:16,737 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 16:51:16,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 16:51:16,737 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2024-10-13 16:51:16,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 16:51:16,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1526146498, now seen corresponding path program 1 times [2024-10-13 16:51:16,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 16:51:16,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151814768] [2024-10-13 16:51:16,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 16:51:16,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 16:51:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 16:51:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 16:51:16,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 16:51:16,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151814768] [2024-10-13 16:51:16,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151814768] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 16:51:16,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 16:51:16,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 16:51:16,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243768780] [2024-10-13 16:51:16,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 16:51:16,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 16:51:16,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 16:51:16,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 16:51:16,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 16:51:16,838 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 88 [2024-10-13 16:51:16,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 105 transitions, 452 flow. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 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) [2024-10-13 16:51:16,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 16:51:16,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 88 [2024-10-13 16:51:16,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 16:51:20,996 INFO L124 PetriNetUnfolderBase]: 33685/45947 cut-off events. [2024-10-13 16:51:20,997 INFO L125 PetriNetUnfolderBase]: For 2284/2284 co-relation queries the response was YES. [2024-10-13 16:51:21,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96633 conditions, 45947 events. 33685/45947 cut-off events. For 2284/2284 co-relation queries the response was YES. Maximal size of possible extension queue 3665. Compared 345630 event pairs, 28448 based on Foata normal form. 521/25213 useless extension candidates. Maximal degree in co-relation 96510. Up to 40670 conditions per place. [2024-10-13 16:51:21,246 INFO L140 encePairwiseOnDemand]: 77/88 looper letters, 116 selfloop transitions, 7 changer transitions 1/146 dead transitions. [2024-10-13 16:51:21,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 146 transitions, 862 flow [2024-10-13 16:51:21,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 16:51:21,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 16:51:21,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 201 transitions. [2024-10-13 16:51:21,247 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5710227272727273 [2024-10-13 16:51:21,247 INFO L175 Difference]: Start difference. First operand has 86 places, 105 transitions, 452 flow. Second operand 4 states and 201 transitions. [2024-10-13 16:51:21,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 146 transitions, 862 flow [2024-10-13 16:51:21,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 146 transitions, 859 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 16:51:21,252 INFO L231 Difference]: Finished difference. Result has 89 places, 105 transitions, 481 flow [2024-10-13 16:51:21,253 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=481, PETRI_PLACES=89, PETRI_TRANSITIONS=105} [2024-10-13 16:51:21,253 INFO L277 CegarLoopForPetriNet]: 88 programPoint places, 1 predicate places. [2024-10-13 16:51:21,253 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 105 transitions, 481 flow [2024-10-13 16:51:21,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 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) [2024-10-13 16:51:21,254 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 16:51:21,254 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 16:51:21,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 16:51:21,254 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2024-10-13 16:51:21,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 16:51:21,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1254627986, now seen corresponding path program 1 times [2024-10-13 16:51:21,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 16:51:21,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863142680] [2024-10-13 16:51:21,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 16:51:21,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 16:51:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 16:51:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 16:51:21,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 16:51:21,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863142680] [2024-10-13 16:51:21,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863142680] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 16:51:21,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 16:51:21,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 16:51:21,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918592899] [2024-10-13 16:51:21,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 16:51:21,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 16:51:21,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 16:51:21,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 16:51:21,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 16:51:21,324 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 88 [2024-10-13 16:51:21,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 105 transitions, 481 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2024-10-13 16:51:21,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 16:51:21,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 88 [2024-10-13 16:51:21,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 16:51:25,586 INFO L124 PetriNetUnfolderBase]: 32711/42913 cut-off events. [2024-10-13 16:51:25,586 INFO L125 PetriNetUnfolderBase]: For 4917/4917 co-relation queries the response was YES. [2024-10-13 16:51:25,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98382 conditions, 42913 events. 32711/42913 cut-off events. For 4917/4917 co-relation queries the response was YES. Maximal size of possible extension queue 3196. Compared 267484 event pairs, 6084 based on Foata normal form. 310/23104 useless extension candidates. Maximal degree in co-relation 98257. Up to 38207 conditions per place. [2024-10-13 16:51:25,830 INFO L140 encePairwiseOnDemand]: 80/88 looper letters, 107 selfloop transitions, 2 changer transitions 0/131 dead transitions. [2024-10-13 16:51:25,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 131 transitions, 774 flow [2024-10-13 16:51:25,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 16:51:25,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 16:51:25,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2024-10-13 16:51:25,832 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-13 16:51:25,832 INFO L175 Difference]: Start difference. First operand has 89 places, 105 transitions, 481 flow. Second operand 3 states and 165 transitions. [2024-10-13 16:51:25,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 131 transitions, 774 flow [2024-10-13 16:51:25,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 131 transitions, 766 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-13 16:51:25,838 INFO L231 Difference]: Finished difference. Result has 91 places, 106 transitions, 495 flow [2024-10-13 16:51:25,838 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=495, PETRI_PLACES=91, PETRI_TRANSITIONS=106} [2024-10-13 16:51:25,839 INFO L277 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2024-10-13 16:51:25,839 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 106 transitions, 495 flow [2024-10-13 16:51:25,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2024-10-13 16:51:25,839 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 16:51:25,839 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 16:51:25,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-13 16:51:25,839 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2024-10-13 16:51:25,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 16:51:25,840 INFO L85 PathProgramCache]: Analyzing trace with hash -2077063291, now seen corresponding path program 1 times [2024-10-13 16:51:25,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 16:51:25,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280220879] [2024-10-13 16:51:25,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 16:51:25,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 16:51:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 16:51:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 16:51:26,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 16:51:26,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280220879] [2024-10-13 16:51:26,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280220879] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 16:51:26,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 16:51:26,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 16:51:26,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909193363] [2024-10-13 16:51:26,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 16:51:26,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 16:51:26,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 16:51:26,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 16:51:26,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-13 16:51:26,084 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 88 [2024-10-13 16:51:26,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 106 transitions, 495 flow. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 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) [2024-10-13 16:51:26,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 16:51:26,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 88 [2024-10-13 16:51:26,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand