./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../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.fs.icfgbuilder-eval-3289d67-m [2024-11-17 07:55:59,301 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 07:55:59,356 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-11-17 07:55:59,362 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 07:55:59,362 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 07:55:59,386 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 07:55:59,386 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 07:55:59,387 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 07:55:59,387 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 07:55:59,389 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 07:55:59,389 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 07:55:59,389 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 07:55:59,390 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 07:55:59,390 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 07:55:59,390 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 07:55:59,390 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 07:55:59,390 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-17 07:55:59,391 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 07:55:59,391 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 07:55:59,394 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 07:55:59,394 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 07:55:59,394 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-17 07:55:59,395 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 07:55:59,395 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-17 07:55:59,395 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 07:55:59,395 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-17 07:55:59,395 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 07:55:59,395 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 07:55:59,396 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-17 07:55:59,396 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 07:55:59,396 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 07:55:59,396 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 07:55:59,396 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 07:55:59,397 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 07:55:59,397 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 07:55:59,397 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 07:55:59,398 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 07:55:59,398 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-17 07:55:59,398 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 07:55:59,398 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 07:55:59,398 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 07:55:59,399 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 07:55:59,399 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 07:55:59,399 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 07:55:59,399 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c [2024-11-17 07:55:59,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 07:55:59,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 07:55:59,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 07:55:59,642 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 07:55:59,642 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 07:55:59,643 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2024-11-17 07:56:01,037 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 07:56:01,215 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 07:56:01,216 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2024-11-17 07:56:01,228 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/738b390bc/5d0ef17dba5b401c925ac9b659faecee/FLAG7e2716fa1 [2024-11-17 07:56:01,241 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/738b390bc/5d0ef17dba5b401c925ac9b659faecee [2024-11-17 07:56:01,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 07:56:01,246 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 07:56:01,248 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 07:56:01,249 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 07:56:01,257 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 07:56:01,260 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 07:56:01" (1/1) ... [2024-11-17 07:56:01,261 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@213c3841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:56:01, skipping insertion in model container [2024-11-17 07:56:01,261 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 07:56:01" (1/1) ... [2024-11-17 07:56:01,294 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 07:56:01,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 07:56:01,519 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 07:56:01,551 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 07:56:01,572 INFO L204 MainTranslator]: Completed translation [2024-11-17 07:56:01,573 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:56:01 WrapperNode [2024-11-17 07:56:01,576 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 07:56:01,577 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 07:56:01,577 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 07:56:01,577 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 07:56:01,583 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:56:01" (1/1) ... [2024-11-17 07:56:01,597 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:56:01" (1/1) ... [2024-11-17 07:56:01,637 INFO L138 Inliner]: procedures = 26, calls = 68, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 383 [2024-11-17 07:56:01,638 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 07:56:01,642 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 07:56:01,643 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 07:56:01,643 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 07:56:01,655 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:56:01" (1/1) ... [2024-11-17 07:56:01,655 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:56:01" (1/1) ... [2024-11-17 07:56:01,660 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:56:01" (1/1) ... [2024-11-17 07:56:01,678 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]. [2024-11-17 07:56:01,678 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:56:01" (1/1) ... [2024-11-17 07:56:01,679 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:56:01" (1/1) ... [2024-11-17 07:56:01,692 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:56:01" (1/1) ... [2024-11-17 07:56:01,693 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:56:01" (1/1) ... [2024-11-17 07:56:01,694 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:56:01" (1/1) ... [2024-11-17 07:56:01,695 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:56:01" (1/1) ... [2024-11-17 07:56:01,697 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 07:56:01,698 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 07:56:01,698 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 07:56:01,698 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 07:56:01,699 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:56:01" (1/1) ... [2024-11-17 07:56:01,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 07:56:01,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:56:01,730 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) [2024-11-17 07:56:01,732 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 [2024-11-17 07:56:01,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 07:56:01,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 07:56:01,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 07:56:01,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 07:56:01,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 07:56:01,791 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 07:56:01,791 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 07:56:01,791 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 07:56:01,791 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 07:56:01,791 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-17 07:56:01,791 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-17 07:56:01,792 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-17 07:56:01,792 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-17 07:56:01,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 07:56:01,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 07:56:01,808 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-17 07:56:01,808 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-17 07:56:01,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 07:56:01,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 07:56:01,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 07:56:01,811 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 07:56:01,906 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 07:56:01,907 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 07:56:02,336 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 07:56:02,336 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 07:56:02,761 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 07:56:02,761 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 07:56:02,762 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 07:56:02 BoogieIcfgContainer [2024-11-17 07:56:02,762 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 07:56:02,763 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 07:56:02,767 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 07:56:02,769 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 07:56:02,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 07:56:01" (1/3) ... [2024-11-17 07:56:02,770 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2d96fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 07:56:02, skipping insertion in model container [2024-11-17 07:56:02,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:56:01" (2/3) ... [2024-11-17 07:56:02,771 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2d96fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 07:56:02, skipping insertion in model container [2024-11-17 07:56:02,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 07:56:02" (3/3) ... [2024-11-17 07:56:02,773 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2024-11-17 07:56:02,799 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 07:56:02,803 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2024-11-17 07:56:02,803 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 07:56:02,913 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-17 07:56:02,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 109 transitions, 246 flow [2024-11-17 07:56:02,978 INFO L124 PetriNetUnfolderBase]: 14/105 cut-off events. [2024-11-17 07:56:02,979 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-17 07:56:02,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 105 events. 14/105 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 341 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2024-11-17 07:56:02,983 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 109 transitions, 246 flow [2024-11-17 07:56:02,987 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 103 transitions, 227 flow [2024-11-17 07:56:02,996 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 07:56:03,003 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;@38c6b3ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 07:56:03,004 INFO L334 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2024-11-17 07:56:03,008 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 07:56:03,009 INFO L124 PetriNetUnfolderBase]: 2/8 cut-off events. [2024-11-17 07:56:03,009 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 07:56:03,009 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:56:03,009 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 07:56:03,010 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2024-11-17 07:56:03,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:56:03,014 INFO L85 PathProgramCache]: Analyzing trace with hash 34197986, now seen corresponding path program 1 times [2024-11-17 07:56:03,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:56:03,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069596023] [2024-11-17 07:56:03,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:56:03,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:56:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:56:03,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:56:03,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:56:03,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069596023] [2024-11-17 07:56:03,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069596023] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 07:56:03,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 07:56:03,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 07:56:03,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458195123] [2024-11-17 07:56:03,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 07:56:03,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 07:56:03,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:56:03,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 07:56:03,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 07:56:03,311 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 109 [2024-11-17 07:56:03,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 103 transitions, 227 flow. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:56:03,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:56:03,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 109 [2024-11-17 07:56:03,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:56:08,546 INFO L124 PetriNetUnfolderBase]: 37133/49456 cut-off events. [2024-11-17 07:56:08,547 INFO L125 PetriNetUnfolderBase]: For 1587/1587 co-relation queries the response was YES. [2024-11-17 07:56:08,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99423 conditions, 49456 events. 37133/49456 cut-off events. For 1587/1587 co-relation queries the response was YES. Maximal size of possible extension queue 3449. Compared 342997 event pairs, 32026 based on Foata normal form. 5110/34073 useless extension candidates. Maximal degree in co-relation 92934. Up to 48076 conditions per place. [2024-11-17 07:56:08,881 INFO L140 encePairwiseOnDemand]: 80/109 looper letters, 49 selfloop transitions, 8 changer transitions 0/82 dead transitions. [2024-11-17 07:56:08,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 82 transitions, 299 flow [2024-11-17 07:56:08,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 07:56:08,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 07:56:08,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 194 transitions. [2024-11-17 07:56:08,894 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44495412844036697 [2024-11-17 07:56:08,895 INFO L175 Difference]: Start difference. First operand has 102 places, 103 transitions, 227 flow. Second operand 4 states and 194 transitions. [2024-11-17 07:56:08,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 82 transitions, 299 flow [2024-11-17 07:56:09,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 82 transitions, 286 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-17 07:56:09,206 INFO L231 Difference]: Finished difference. Result has 84 places, 82 transitions, 188 flow [2024-11-17 07:56:09,207 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=84, PETRI_TRANSITIONS=82} [2024-11-17 07:56:09,210 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -18 predicate places. [2024-11-17 07:56:09,210 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 82 transitions, 188 flow [2024-11-17 07:56:09,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:56:09,210 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:56:09,211 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-17 07:56:09,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 07:56:09,211 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2024-11-17 07:56:09,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:56:09,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1060138600, now seen corresponding path program 1 times [2024-11-17 07:56:09,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:56:09,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296392016] [2024-11-17 07:56:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:56:09,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:56:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:56:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:56:09,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:56:09,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296392016] [2024-11-17 07:56:09,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296392016] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 07:56:09,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 07:56:09,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 07:56:09,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993195704] [2024-11-17 07:56:09,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 07:56:09,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 07:56:09,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:56:09,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 07:56:09,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 07:56:09,358 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 109 [2024-11-17 07:56:09,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 82 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:56:09,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:56:09,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 109 [2024-11-17 07:56:09,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:56:14,043 INFO L124 PetriNetUnfolderBase]: 37136/49474 cut-off events. [2024-11-17 07:56:14,044 INFO L125 PetriNetUnfolderBase]: For 257/257 co-relation queries the response was YES. [2024-11-17 07:56:14,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98660 conditions, 49474 events. 37136/49474 cut-off events. For 257/257 co-relation queries the response was YES. Maximal size of possible extension queue 3449. Compared 343217 event pairs, 32026 based on Foata normal form. 3/28987 useless extension candidates. Maximal degree in co-relation 98580. Up to 48089 conditions per place. [2024-11-17 07:56:14,351 INFO L140 encePairwiseOnDemand]: 96/109 looper letters, 56 selfloop transitions, 10 changer transitions 0/91 dead transitions. [2024-11-17 07:56:14,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 91 transitions, 352 flow [2024-11-17 07:56:14,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 07:56:14,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 07:56:14,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 185 transitions. [2024-11-17 07:56:14,354 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4243119266055046 [2024-11-17 07:56:14,354 INFO L175 Difference]: Start difference. First operand has 84 places, 82 transitions, 188 flow. Second operand 4 states and 185 transitions. [2024-11-17 07:56:14,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 91 transitions, 352 flow [2024-11-17 07:56:14,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 91 transitions, 322 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 07:56:14,359 INFO L231 Difference]: Finished difference. Result has 87 places, 91 transitions, 254 flow [2024-11-17 07:56:14,359 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=87, PETRI_TRANSITIONS=91} [2024-11-17 07:56:14,360 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -15 predicate places. [2024-11-17 07:56:14,360 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 91 transitions, 254 flow [2024-11-17 07:56:14,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:56:14,360 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:56:14,360 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1] [2024-11-17 07:56:14,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 07:56:14,361 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2024-11-17 07:56:14,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:56:14,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1022310647, now seen corresponding path program 1 times [2024-11-17 07:56:14,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:56:14,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832087848] [2024-11-17 07:56:14,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:56:14,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:56:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:56:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:56:14,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:56:14,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832087848] [2024-11-17 07:56:14,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832087848] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 07:56:14,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480385987] [2024-11-17 07:56:14,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:56:14,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:56:14,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:56:14,443 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) [2024-11-17 07:56:14,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 07:56:14,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:56:14,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-17 07:56:14,547 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 07:56:14,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:56:14,583 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 07:56:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:56:14,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480385987] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 07:56:14,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 07:56:14,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-17 07:56:14,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516147620] [2024-11-17 07:56:14,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 07:56:14,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-17 07:56:14,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:56:14,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-17 07:56:14,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-17 07:56:14,695 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 109 [2024-11-17 07:56:14,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 91 transitions, 254 flow. Second operand has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 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) [2024-11-17 07:56:14,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:56:14,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 109 [2024-11-17 07:56:14,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:56:19,126 INFO L124 PetriNetUnfolderBase]: 37145/49528 cut-off events. [2024-11-17 07:56:19,127 INFO L125 PetriNetUnfolderBase]: For 318/318 co-relation queries the response was YES. [2024-11-17 07:56:19,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98793 conditions, 49528 events. 37145/49528 cut-off events. For 318/318 co-relation queries the response was YES. Maximal size of possible extension queue 3449. Compared 343499 event pairs, 32026 based on Foata normal form. 0/29035 useless extension candidates. Maximal degree in co-relation 98600. Up to 48092 conditions per place. [2024-11-17 07:56:19,443 INFO L140 encePairwiseOnDemand]: 96/109 looper letters, 56 selfloop transitions, 37 changer transitions 0/118 dead transitions. [2024-11-17 07:56:19,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 118 transitions, 560 flow [2024-11-17 07:56:19,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 07:56:19,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 07:56:19,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 392 transitions. [2024-11-17 07:56:19,448 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3596330275229358 [2024-11-17 07:56:19,449 INFO L175 Difference]: Start difference. First operand has 87 places, 91 transitions, 254 flow. Second operand 10 states and 392 transitions. [2024-11-17 07:56:19,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 118 transitions, 560 flow [2024-11-17 07:56:19,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 118 transitions, 560 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 07:56:19,454 INFO L231 Difference]: Finished difference. Result has 99 places, 118 transitions, 498 flow [2024-11-17 07:56:19,454 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=498, PETRI_PLACES=99, PETRI_TRANSITIONS=118} [2024-11-17 07:56:19,454 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -3 predicate places. [2024-11-17 07:56:19,454 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 118 transitions, 498 flow [2024-11-17 07:56:19,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 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) [2024-11-17 07:56:19,455 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:56:19,455 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:56:19,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-17 07:56:19,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:56:19,660 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2024-11-17 07:56:19,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:56:19,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1562961137, now seen corresponding path program 1 times [2024-11-17 07:56:19,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:56:19,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20113664] [2024-11-17 07:56:19,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:56:19,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:56:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:56:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:56:19,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:56:19,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20113664] [2024-11-17 07:56:19,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20113664] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 07:56:19,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 07:56:19,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 07:56:19,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205504248] [2024-11-17 07:56:19,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 07:56:19,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 07:56:19,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:56:19,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 07:56:19,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 07:56:19,773 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 109 [2024-11-17 07:56:19,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 118 transitions, 498 flow. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2024-11-17 07:56:19,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:56:19,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 109 [2024-11-17 07:56:19,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:56:26,859 INFO L124 PetriNetUnfolderBase]: 54266/75595 cut-off events. [2024-11-17 07:56:26,860 INFO L125 PetriNetUnfolderBase]: For 464/464 co-relation queries the response was YES. [2024-11-17 07:56:27,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147615 conditions, 75595 events. 54266/75595 cut-off events. For 464/464 co-relation queries the response was YES. Maximal size of possible extension queue 4645. Compared 581732 event pairs, 18478 based on Foata normal form. 0/46948 useless extension candidates. Maximal degree in co-relation 147514. Up to 43072 conditions per place. [2024-11-17 07:56:27,386 INFO L140 encePairwiseOnDemand]: 105/109 looper letters, 127 selfloop transitions, 2 changer transitions 0/157 dead transitions. [2024-11-17 07:56:27,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 157 transitions, 841 flow [2024-11-17 07:56:27,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 07:56:27,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 07:56:27,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2024-11-17 07:56:27,388 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6116207951070336 [2024-11-17 07:56:27,388 INFO L175 Difference]: Start difference. First operand has 99 places, 118 transitions, 498 flow. Second operand 3 states and 200 transitions. [2024-11-17 07:56:27,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 157 transitions, 841 flow [2024-11-17 07:56:27,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 157 transitions, 746 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-11-17 07:56:27,394 INFO L231 Difference]: Finished difference. Result has 98 places, 119 transitions, 417 flow [2024-11-17 07:56:27,395 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=417, PETRI_PLACES=98, PETRI_TRANSITIONS=119} [2024-11-17 07:56:27,396 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -4 predicate places. [2024-11-17 07:56:27,397 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 119 transitions, 417 flow [2024-11-17 07:56:27,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2024-11-17 07:56:27,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:56:27,397 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:56:27,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 07:56:27,398 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2024-11-17 07:56:27,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:56:27,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1959887129, now seen corresponding path program 1 times [2024-11-17 07:56:27,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:56:27,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139700218] [2024-11-17 07:56:27,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:56:27,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:56:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:56:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:56:27,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:56:27,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139700218] [2024-11-17 07:56:27,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139700218] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 07:56:27,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 07:56:27,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 07:56:27,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034214437] [2024-11-17 07:56:27,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 07:56:27,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 07:56:27,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:56:27,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 07:56:27,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 07:56:27,536 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 109 [2024-11-17 07:56:27,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 119 transitions, 417 flow. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2024-11-17 07:56:27,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:56:27,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 109 [2024-11-17 07:56:27,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand