./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 023d838f 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-023d838-m [2024-11-10 22:26:34,653 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 22:26:34,722 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-11-10 22:26:34,728 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 22:26:34,728 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 22:26:34,751 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 22:26:34,751 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 22:26:34,752 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 22:26:34,752 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 22:26:34,753 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 22:26:34,753 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 22:26:34,754 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 22:26:34,754 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 22:26:34,755 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 22:26:34,755 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 22:26:34,755 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 22:26:34,756 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 22:26:34,756 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 22:26:34,756 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 22:26:34,757 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 22:26:34,758 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 22:26:34,759 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 22:26:34,759 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 22:26:34,759 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 22:26:34,759 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 22:26:34,760 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-10 22:26:34,760 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 22:26:34,760 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 22:26:34,760 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 22:26:34,760 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 22:26:34,761 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 22:26:34,761 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 22:26:34,761 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 22:26:34,761 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 22:26:34,761 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 22:26:34,762 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 22:26:34,762 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 22:26:34,763 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 22:26:34,764 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 22:26:34,764 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 22:26:34,764 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 22:26:34,764 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 22:26:34,765 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 22:26:34,765 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 22:26:34,765 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c [2024-11-10 22:26:35,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 22:26:35,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 22:26:35,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 22:26:35,052 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 22:26:35,052 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 22:26:35,054 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2024-11-10 22:26:36,515 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 22:26:36,730 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 22:26:36,731 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2024-11-10 22:26:36,743 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/676efb0ca/daa06767baad41be9e24288608427c35/FLAG59e603f77 [2024-11-10 22:26:37,080 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/676efb0ca/daa06767baad41be9e24288608427c35 [2024-11-10 22:26:37,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 22:26:37,083 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 22:26:37,087 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 22:26:37,087 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 22:26:37,093 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 22:26:37,094 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:26:37" (1/1) ... [2024-11-10 22:26:37,095 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43ef9628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:37, skipping insertion in model container [2024-11-10 22:26:37,096 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:26:37" (1/1) ... [2024-11-10 22:26:37,125 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 22:26:37,328 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 22:26:37,344 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 22:26:37,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 22:26:37,410 INFO L204 MainTranslator]: Completed translation [2024-11-10 22:26:37,411 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:37 WrapperNode [2024-11-10 22:26:37,411 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 22:26:37,412 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 22:26:37,412 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 22:26:37,412 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 22:26:37,419 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:37" (1/1) ... [2024-11-10 22:26:37,433 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:37" (1/1) ... [2024-11-10 22:26:37,470 INFO L138 Inliner]: procedures = 26, calls = 68, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 383 [2024-11-10 22:26:37,471 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 22:26:37,472 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 22:26:37,472 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 22:26:37,472 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 22:26:37,483 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:37" (1/1) ... [2024-11-10 22:26:37,484 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:37" (1/1) ... [2024-11-10 22:26:37,488 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:37" (1/1) ... [2024-11-10 22:26:37,516 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]. [2024-11-10 22:26:37,517 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:37" (1/1) ... [2024-11-10 22:26:37,517 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:37" (1/1) ... [2024-11-10 22:26:37,528 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:37" (1/1) ... [2024-11-10 22:26:37,529 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:37" (1/1) ... [2024-11-10 22:26:37,531 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:37" (1/1) ... [2024-11-10 22:26:37,537 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:37" (1/1) ... [2024-11-10 22:26:37,542 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 22:26:37,546 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 22:26:37,546 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 22:26:37,546 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 22:26:37,547 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:37" (1/1) ... [2024-11-10 22:26:37,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 22:26:37,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 22:26:37,581 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) [2024-11-10 22:26:37,585 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 [2024-11-10 22:26:37,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 22:26:37,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 22:26:37,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 22:26:37,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 22:26:37,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 22:26:37,636 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 22:26:37,636 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 22:26:37,636 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 22:26:37,636 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 22:26:37,638 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-10 22:26:37,638 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-10 22:26:37,638 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-10 22:26:37,639 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-10 22:26:37,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 22:26:37,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 22:26:37,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-10 22:26:37,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-10 22:26:37,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 22:26:37,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 22:26:37,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 22:26:37,641 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 22:26:37,769 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 22:26:37,771 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 22:26:38,409 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 22:26:38,409 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 22:26:38,866 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 22:26:38,867 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 22:26:38,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:26:38 BoogieIcfgContainer [2024-11-10 22:26:38,867 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 22:26:38,871 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 22:26:38,872 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 22:26:38,875 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 22:26:38,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:26:37" (1/3) ... [2024-11-10 22:26:38,876 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ea0b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:26:38, skipping insertion in model container [2024-11-10 22:26:38,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:37" (2/3) ... [2024-11-10 22:26:38,877 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ea0b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:26:38, skipping insertion in model container [2024-11-10 22:26:38,878 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:26:38" (3/3) ... [2024-11-10 22:26:38,879 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2024-11-10 22:26:38,895 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 22:26:38,896 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2024-11-10 22:26:38,896 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 22:26:39,075 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-10 22:26:39,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 109 transitions, 246 flow [2024-11-10 22:26:39,169 INFO L124 PetriNetUnfolderBase]: 14/105 cut-off events. [2024-11-10 22:26:39,170 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-10 22:26:39,176 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. [2024-11-10 22:26:39,176 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 109 transitions, 246 flow [2024-11-10 22:26:39,182 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 103 transitions, 227 flow [2024-11-10 22:26:39,194 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 22:26:39,204 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;@3e193cfe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 22:26:39,204 INFO L334 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2024-11-10 22:26:39,209 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 22:26:39,210 INFO L124 PetriNetUnfolderBase]: 2/8 cut-off events. [2024-11-10 22:26:39,210 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 22:26:39,210 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 22:26:39,211 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 22:26:39,211 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2024-11-10 22:26:39,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 22:26:39,217 INFO L85 PathProgramCache]: Analyzing trace with hash 34197986, now seen corresponding path program 1 times [2024-11-10 22:26:39,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 22:26:39,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507741471] [2024-11-10 22:26:39,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:26:39,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 22:26:39,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:26:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:26:39,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 22:26:39,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507741471] [2024-11-10 22:26:39,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507741471] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 22:26:39,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 22:26:39,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 22:26:39,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921101344] [2024-11-10 22:26:39,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 22:26:39,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 22:26:39,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 22:26:39,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 22:26:39,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 22:26:39,622 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 109 [2024-11-10 22:26:39,625 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) [2024-11-10 22:26:39,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 22:26:39,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 109 [2024-11-10 22:26:39,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 22:26:46,544 INFO L124 PetriNetUnfolderBase]: 37133/49456 cut-off events. [2024-11-10 22:26:46,544 INFO L125 PetriNetUnfolderBase]: For 1587/1587 co-relation queries the response was YES. [2024-11-10 22:26:46,660 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. [2024-11-10 22:26:46,962 INFO L140 encePairwiseOnDemand]: 80/109 looper letters, 49 selfloop transitions, 8 changer transitions 0/82 dead transitions. [2024-11-10 22:26:46,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 82 transitions, 299 flow [2024-11-10 22:26:46,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 22:26:46,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 22:26:46,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 194 transitions. [2024-11-10 22:26:47,000 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44495412844036697 [2024-11-10 22:26:47,002 INFO L175 Difference]: Start difference. First operand has 102 places, 103 transitions, 227 flow. Second operand 4 states and 194 transitions. [2024-11-10 22:26:47,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 82 transitions, 299 flow [2024-11-10 22:26:47,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 82 transitions, 286 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-10 22:26:47,293 INFO L231 Difference]: Finished difference. Result has 84 places, 82 transitions, 188 flow [2024-11-10 22:26:47,295 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} [2024-11-10 22:26:47,299 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -18 predicate places. [2024-11-10 22:26:47,299 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 82 transitions, 188 flow [2024-11-10 22:26:47,300 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) [2024-11-10 22:26:47,300 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 22:26:47,300 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-10 22:26:47,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 22:26:47,303 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2024-11-10 22:26:47,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 22:26:47,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1060138600, now seen corresponding path program 1 times [2024-11-10 22:26:47,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 22:26:47,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105090212] [2024-11-10 22:26:47,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:26:47,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 22:26:47,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:26:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:26:47,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 22:26:47,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105090212] [2024-11-10 22:26:47,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105090212] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 22:26:47,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 22:26:47,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 22:26:47,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369355408] [2024-11-10 22:26:47,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 22:26:47,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 22:26:47,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 22:26:47,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 22:26:47,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 22:26:47,468 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 109 [2024-11-10 22:26:47,468 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) [2024-11-10 22:26:47,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 22:26:47,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 109 [2024-11-10 22:26:47,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 22:26:51,858 INFO L124 PetriNetUnfolderBase]: 37136/49474 cut-off events. [2024-11-10 22:26:51,858 INFO L125 PetriNetUnfolderBase]: For 257/257 co-relation queries the response was YES. [2024-11-10 22:26:51,923 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. [2024-11-10 22:26:52,185 INFO L140 encePairwiseOnDemand]: 96/109 looper letters, 56 selfloop transitions, 10 changer transitions 0/91 dead transitions. [2024-11-10 22:26:52,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 91 transitions, 352 flow [2024-11-10 22:26:52,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 22:26:52,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 22:26:52,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 185 transitions. [2024-11-10 22:26:52,190 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4243119266055046 [2024-11-10 22:26:52,190 INFO L175 Difference]: Start difference. First operand has 84 places, 82 transitions, 188 flow. Second operand 4 states and 185 transitions. [2024-11-10 22:26:52,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 91 transitions, 352 flow [2024-11-10 22:26:52,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 91 transitions, 322 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 22:26:52,196 INFO L231 Difference]: Finished difference. Result has 87 places, 91 transitions, 254 flow [2024-11-10 22:26:52,196 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} [2024-11-10 22:26:52,197 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -15 predicate places. [2024-11-10 22:26:52,197 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 91 transitions, 254 flow [2024-11-10 22:26:52,198 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) [2024-11-10 22:26:52,198 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 22:26:52,198 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1] [2024-11-10 22:26:52,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 22:26:52,198 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2024-11-10 22:26:52,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 22:26:52,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1022310647, now seen corresponding path program 1 times [2024-11-10 22:26:52,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 22:26:52,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274333810] [2024-11-10 22:26:52,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:26:52,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 22:26:52,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:26:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:26:52,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 22:26:52,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274333810] [2024-11-10 22:26:52,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274333810] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 22:26:52,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132157168] [2024-11-10 22:26:52,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:26:52,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 22:26:52,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 22:26:52,327 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) [2024-11-10 22:26:52,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 22:26:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:26:52,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-10 22:26:52,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 22:26:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:26:52,494 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 22:26:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:26:52,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132157168] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 22:26:52,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 22:26:52,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-10 22:26:52,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72119704] [2024-11-10 22:26:52,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 22:26:52,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-10 22:26:52,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 22:26:52,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-10 22:26:52,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-10 22:26:52,621 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 109 [2024-11-10 22:26:52,622 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) [2024-11-10 22:26:52,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 22:26:52,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 109 [2024-11-10 22:26:52,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 22:26:57,379 INFO L124 PetriNetUnfolderBase]: 37145/49528 cut-off events. [2024-11-10 22:26:57,379 INFO L125 PetriNetUnfolderBase]: For 318/318 co-relation queries the response was YES. [2024-11-10 22:26:57,480 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. [2024-11-10 22:26:57,848 INFO L140 encePairwiseOnDemand]: 96/109 looper letters, 56 selfloop transitions, 37 changer transitions 0/118 dead transitions. [2024-11-10 22:26:57,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 118 transitions, 560 flow [2024-11-10 22:26:57,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 22:26:57,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 22:26:57,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 392 transitions. [2024-11-10 22:26:57,851 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3596330275229358 [2024-11-10 22:26:57,852 INFO L175 Difference]: Start difference. First operand has 87 places, 91 transitions, 254 flow. Second operand 10 states and 392 transitions. [2024-11-10 22:26:57,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 118 transitions, 560 flow [2024-11-10 22:26:57,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 118 transitions, 560 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 22:26:57,858 INFO L231 Difference]: Finished difference. Result has 99 places, 118 transitions, 498 flow [2024-11-10 22:26:57,858 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} [2024-11-10 22:26:57,859 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -3 predicate places. [2024-11-10 22:26:57,860 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 118 transitions, 498 flow [2024-11-10 22:26:57,860 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) [2024-11-10 22:26:57,860 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 22:26:57,860 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 22:26:57,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 22:26:58,062 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 [2024-11-10 22:26:58,063 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2024-11-10 22:26:58,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 22:26:58,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1562961137, now seen corresponding path program 1 times [2024-11-10 22:26:58,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 22:26:58,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547128850] [2024-11-10 22:26:58,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:26:58,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 22:26:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:26:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:26:58,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 22:26:58,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547128850] [2024-11-10 22:26:58,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547128850] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 22:26:58,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 22:26:58,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 22:26:58,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63993012] [2024-11-10 22:26:58,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 22:26:58,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 22:26:58,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 22:26:58,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 22:26:58,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 22:26:58,166 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 109 [2024-11-10 22:26:58,168 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) [2024-11-10 22:26:58,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 22:26:58,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 109 [2024-11-10 22:26:58,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 22:27:05,222 INFO L124 PetriNetUnfolderBase]: 54266/75595 cut-off events. [2024-11-10 22:27:05,222 INFO L125 PetriNetUnfolderBase]: For 464/464 co-relation queries the response was YES. [2024-11-10 22:27:05,456 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. [2024-11-10 22:27:05,711 INFO L140 encePairwiseOnDemand]: 105/109 looper letters, 127 selfloop transitions, 2 changer transitions 0/157 dead transitions. [2024-11-10 22:27:05,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 157 transitions, 841 flow [2024-11-10 22:27:05,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 22:27:05,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 22:27:05,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2024-11-10 22:27:05,713 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6116207951070336 [2024-11-10 22:27:05,713 INFO L175 Difference]: Start difference. First operand has 99 places, 118 transitions, 498 flow. Second operand 3 states and 200 transitions. [2024-11-10 22:27:05,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 157 transitions, 841 flow [2024-11-10 22:27:05,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 157 transitions, 746 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-11-10 22:27:05,719 INFO L231 Difference]: Finished difference. Result has 98 places, 119 transitions, 417 flow [2024-11-10 22:27:05,719 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} [2024-11-10 22:27:05,720 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -4 predicate places. [2024-11-10 22:27:05,720 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 119 transitions, 417 flow [2024-11-10 22:27:05,721 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) [2024-11-10 22:27:05,721 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 22:27:05,721 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 22:27:05,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 22:27:05,721 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2024-11-10 22:27:05,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 22:27:05,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1959887129, now seen corresponding path program 1 times [2024-11-10 22:27:05,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 22:27:05,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913020108] [2024-11-10 22:27:05,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:27:05,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 22:27:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:27:05,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:27:05,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 22:27:05,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913020108] [2024-11-10 22:27:05,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913020108] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 22:27:05,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 22:27:05,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 22:27:05,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893849453] [2024-11-10 22:27:05,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 22:27:05,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 22:27:05,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 22:27:05,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 22:27:05,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 22:27:05,871 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 109 [2024-11-10 22:27:05,871 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) [2024-11-10 22:27:05,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 22:27:05,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 109 [2024-11-10 22:27:05,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand