./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-mult.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-mult.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 e5124dd4a5a155d8a4e322a35428820633f9eccdd993e14120e650d1ba1fbebe --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 22:26:16,455 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 22:26:16,544 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-11-10 22:26:16,553 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 22:26:16,553 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 22:26:16,572 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 22:26:16,573 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 22:26:16,573 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 22:26:16,574 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 22:26:16,575 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 22:26:16,575 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 22:26:16,575 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 22:26:16,576 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 22:26:16,578 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 22:26:16,578 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 22:26:16,579 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 22:26:16,579 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 22:26:16,579 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 22:26:16,579 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 22:26:16,580 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 22:26:16,580 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 22:26:16,584 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 22:26:16,585 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 22:26:16,585 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 22:26:16,586 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 22:26:16,586 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-10 22:26:16,586 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 22:26:16,586 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 22:26:16,586 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 22:26:16,587 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 22:26:16,587 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 22:26:16,587 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 22:26:16,587 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 22:26:16,587 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 22:26:16,588 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 22:26:16,588 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 22:26:16,589 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 22:26:16,589 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 22:26:16,589 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 22:26:16,590 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 22:26:16,590 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 22:26:16,590 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 22:26:16,590 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 22:26:16,590 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 22:26:16,591 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5124dd4a5a155d8a4e322a35428820633f9eccdd993e14120e650d1ba1fbebe [2024-11-10 22:26:16,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 22:26:16,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 22:26:16,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 22:26:16,878 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 22:26:16,879 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 22:26:16,880 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2024-11-10 22:26:18,254 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 22:26:18,464 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 22:26:18,466 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2024-11-10 22:26:18,478 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f6a77987/0f53f1eeab2045248e4a8abda9a676e4/FLAG8e105dd3a [2024-11-10 22:26:18,495 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f6a77987/0f53f1eeab2045248e4a8abda9a676e4 [2024-11-10 22:26:18,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 22:26:18,501 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 22:26:18,502 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 22:26:18,505 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 22:26:18,510 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 22:26:18,511 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:26:18" (1/1) ... [2024-11-10 22:26:18,512 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30832020 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:18, skipping insertion in model container [2024-11-10 22:26:18,512 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:26:18" (1/1) ... [2024-11-10 22:26:18,538 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 22:26:18,838 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 22:26:18,848 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 22:26:18,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 22:26:18,901 INFO L204 MainTranslator]: Completed translation [2024-11-10 22:26:18,902 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:18 WrapperNode [2024-11-10 22:26:18,905 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 22:26:18,906 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 22:26:18,906 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 22:26:18,907 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 22:26:18,913 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:18" (1/1) ... [2024-11-10 22:26:18,922 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:18" (1/1) ... [2024-11-10 22:26:18,967 INFO L138 Inliner]: procedures = 26, calls = 61, calls flagged for inlining = 19, calls inlined = 23, statements flattened = 338 [2024-11-10 22:26:18,972 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 22:26:18,973 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 22:26:18,973 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 22:26:18,977 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 22:26:18,988 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:18" (1/1) ... [2024-11-10 22:26:18,988 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:18" (1/1) ... [2024-11-10 22:26:18,992 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:18" (1/1) ... [2024-11-10 22:26:19,010 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-10 22:26:19,011 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:18" (1/1) ... [2024-11-10 22:26:19,011 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:18" (1/1) ... [2024-11-10 22:26:19,027 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:18" (1/1) ... [2024-11-10 22:26:19,028 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:18" (1/1) ... [2024-11-10 22:26:19,032 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:18" (1/1) ... [2024-11-10 22:26:19,034 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:18" (1/1) ... [2024-11-10 22:26:19,041 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 22:26:19,042 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 22:26:19,043 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 22:26:19,043 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 22:26:19,044 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:18" (1/1) ... [2024-11-10 22:26:19,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 22:26:19,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 22:26:19,083 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 22:26:19,086 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 22:26:19,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 22:26:19,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 22:26:19,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 22:26:19,138 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 22:26:19,138 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 22:26:19,138 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 22:26:19,138 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 22:26:19,139 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 22:26:19,139 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 22:26:19,141 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-10 22:26:19,141 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-10 22:26:19,141 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-10 22:26:19,141 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-10 22:26:19,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 22:26:19,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 22:26:19,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-10 22:26:19,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-10 22:26:19,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 22:26:19,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 22:26:19,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 22:26:19,145 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 22:26:19,294 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 22:26:19,296 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 22:26:19,811 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 22:26:19,814 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 22:26:20,325 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 22:26:20,325 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 22:26:20,326 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:26:20 BoogieIcfgContainer [2024-11-10 22:26:20,326 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 22:26:20,328 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 22:26:20,328 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 22:26:20,331 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 22:26:20,331 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:26:18" (1/3) ... [2024-11-10 22:26:20,332 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8955f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:26:20, skipping insertion in model container [2024-11-10 22:26:20,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:26:18" (2/3) ... [2024-11-10 22:26:20,334 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8955f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:26:20, skipping insertion in model container [2024-11-10 22:26:20,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:26:20" (3/3) ... [2024-11-10 22:26:20,336 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult.wvr.c [2024-11-10 22:26:20,352 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 22:26:20,353 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2024-11-10 22:26:20,353 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 22:26:20,488 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-10 22:26:20,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 100 transitions, 228 flow [2024-11-10 22:26:20,584 INFO L124 PetriNetUnfolderBase]: 12/96 cut-off events. [2024-11-10 22:26:20,584 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-10 22:26:20,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 96 events. 12/96 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 321 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 78. Up to 2 conditions per place. [2024-11-10 22:26:20,589 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 100 transitions, 228 flow [2024-11-10 22:26:20,594 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 94 transitions, 209 flow [2024-11-10 22:26:20,609 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 22:26:20,617 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;@3e191959, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 22:26:20,618 INFO L334 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2024-11-10 22:26:20,621 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 22:26:20,621 INFO L124 PetriNetUnfolderBase]: 2/8 cut-off events. [2024-11-10 22:26:20,621 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 22:26:20,622 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 22:26:20,622 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 22:26:20,623 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-10 22:26:20,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 22:26:20,629 INFO L85 PathProgramCache]: Analyzing trace with hash 29466177, now seen corresponding path program 1 times [2024-11-10 22:26:20,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 22:26:20,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721145073] [2024-11-10 22:26:20,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:26:20,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 22:26:20,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:26:20,956 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 22:26:20,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 22:26:20,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721145073] [2024-11-10 22:26:20,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721145073] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 22:26:20,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 22:26:20,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 22:26:20,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047070300] [2024-11-10 22:26:20,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 22:26:20,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 22:26:20,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 22:26:20,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 22:26:20,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 22:26:21,034 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 100 [2024-11-10 22:26:21,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 94 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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 22:26:21,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 22:26:21,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 100 [2024-11-10 22:26:21,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 22:26:29,155 INFO L124 PetriNetUnfolderBase]: 52622/70303 cut-off events. [2024-11-10 22:26:29,156 INFO L125 PetriNetUnfolderBase]: For 1839/1839 co-relation queries the response was YES. [2024-11-10 22:26:29,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140938 conditions, 70303 events. 52622/70303 cut-off events. For 1839/1839 co-relation queries the response was YES. Maximal size of possible extension queue 5251. Compared 516177 event pairs, 46020 based on Foata normal form. 6604/44638 useless extension candidates. Maximal degree in co-relation 132980. Up to 68107 conditions per place. [2024-11-10 22:26:29,919 INFO L140 encePairwiseOnDemand]: 75/100 looper letters, 57 selfloop transitions, 7 changer transitions 0/86 dead transitions. [2024-11-10 22:26:29,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 86 transitions, 321 flow [2024-11-10 22:26:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 22:26:29,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 22:26:29,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 188 transitions. [2024-11-10 22:26:29,933 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-11-10 22:26:29,935 INFO L175 Difference]: Start difference. First operand has 95 places, 94 transitions, 209 flow. Second operand 4 states and 188 transitions. [2024-11-10 22:26:29,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 86 transitions, 321 flow [2024-11-10 22:26:30,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 86 transitions, 308 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-10 22:26:30,098 INFO L231 Difference]: Finished difference. Result has 86 places, 86 transitions, 228 flow [2024-11-10 22:26:30,100 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=86, PETRI_TRANSITIONS=86} [2024-11-10 22:26:30,105 INFO L277 CegarLoopForPetriNet]: 95 programPoint places, -9 predicate places. [2024-11-10 22:26:30,106 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 86 transitions, 228 flow [2024-11-10 22:26:30,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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 22:26:30,106 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 22:26:30,106 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-10 22:26:30,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 22:26:30,107 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-10 22:26:30,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 22:26:30,108 INFO L85 PathProgramCache]: Analyzing trace with hash -252157432, now seen corresponding path program 1 times [2024-11-10 22:26:30,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 22:26:30,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280783664] [2024-11-10 22:26:30,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:26:30,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 22:26:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:26:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:26:30,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 22:26:30,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280783664] [2024-11-10 22:26:30,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280783664] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 22:26:30,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657894377] [2024-11-10 22:26:30,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:26:30,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 22:26:30,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 22:26:30,302 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 22:26:30,304 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 22:26:30,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:26:30,416 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-10 22:26:30,420 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 22:26:30,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:26:30,469 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 22:26:30,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657894377] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 22:26:30,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 22:26:30,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-10 22:26:30,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956584711] [2024-11-10 22:26:30,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 22:26:30,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 22:26:30,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 22:26:30,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 22:26:30,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-10 22:26:30,505 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 100 [2024-11-10 22:26:30,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 86 transitions, 228 flow. Second operand has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 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 22:26:30,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 22:26:30,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 100 [2024-11-10 22:26:30,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 22:26:37,146 INFO L124 PetriNetUnfolderBase]: 52622/70301 cut-off events. [2024-11-10 22:26:37,146 INFO L125 PetriNetUnfolderBase]: For 267/267 co-relation queries the response was YES. [2024-11-10 22:26:37,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139966 conditions, 70301 events. 52622/70301 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 5153. Compared 515682 event pairs, 46020 based on Foata normal form. 2/38034 useless extension candidates. Maximal degree in co-relation 139912. Up to 68097 conditions per place. [2024-11-10 22:26:37,615 INFO L140 encePairwiseOnDemand]: 91/100 looper letters, 50 selfloop transitions, 12 changer transitions 0/84 dead transitions. [2024-11-10 22:26:37,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 84 transitions, 344 flow [2024-11-10 22:26:37,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 22:26:37,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 22:26:37,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 220 transitions. [2024-11-10 22:26:37,619 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-11-10 22:26:37,619 INFO L175 Difference]: Start difference. First operand has 86 places, 86 transitions, 228 flow. Second operand 6 states and 220 transitions. [2024-11-10 22:26:37,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 84 transitions, 344 flow [2024-11-10 22:26:37,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 84 transitions, 344 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 22:26:37,625 INFO L231 Difference]: Finished difference. Result has 89 places, 84 transitions, 244 flow [2024-11-10 22:26:37,626 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=244, PETRI_PLACES=89, PETRI_TRANSITIONS=84} [2024-11-10 22:26:37,627 INFO L277 CegarLoopForPetriNet]: 95 programPoint places, -6 predicate places. [2024-11-10 22:26:37,627 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 84 transitions, 244 flow [2024-11-10 22:26:37,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 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 22:26:37,628 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 22:26:37,628 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1] [2024-11-10 22:26:37,650 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 22:26:37,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 22:26:37,830 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-10 22:26:37,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 22:26:37,830 INFO L85 PathProgramCache]: Analyzing trace with hash 773055088, now seen corresponding path program 1 times [2024-11-10 22:26:37,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 22:26:37,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832560906] [2024-11-10 22:26:37,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:26:37,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 22:26:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:26:37,915 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 22:26:37,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 22:26:37,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832560906] [2024-11-10 22:26:37,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832560906] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 22:26:37,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897008406] [2024-11-10 22:26:37,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:26:37,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 22:26:37,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 22:26:37,918 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 22:26:37,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 22:26:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:26:38,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-10 22:26:38,017 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 22:26:38,043 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 22:26:38,043 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 22:26:38,085 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 22:26:38,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897008406] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 22:26:38,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 22:26:38,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-10 22:26:38,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574915272] [2024-11-10 22:26:38,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 22:26:38,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 22:26:38,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 22:26:38,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 22:26:38,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-10 22:26:38,140 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 100 [2024-11-10 22:26:38,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 84 transitions, 244 flow. Second operand has 12 states, 12 states have (on average 27.083333333333332) internal successors, (325), 12 states have internal predecessors, (325), 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 22:26:38,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 22:26:38,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 100 [2024-11-10 22:26:38,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 22:26:44,510 INFO L124 PetriNetUnfolderBase]: 52628/70337 cut-off events. [2024-11-10 22:26:44,510 INFO L125 PetriNetUnfolderBase]: For 366/366 co-relation queries the response was YES. [2024-11-10 22:26:44,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140072 conditions, 70337 events. 52628/70337 cut-off events. For 366/366 co-relation queries the response was YES. Maximal size of possible extension queue 5153. Compared 516388 event pairs, 46020 based on Foata normal form. 6/38076 useless extension candidates. Maximal degree in co-relation 139914. Up to 68108 conditions per place. [2024-11-10 22:26:44,879 INFO L140 encePairwiseOnDemand]: 91/100 looper letters, 55 selfloop transitions, 25 changer transitions 0/102 dead transitions. [2024-11-10 22:26:44,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 102 transitions, 518 flow [2024-11-10 22:26:44,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 22:26:44,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 22:26:44,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 346 transitions. [2024-11-10 22:26:44,882 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.346 [2024-11-10 22:26:44,883 INFO L175 Difference]: Start difference. First operand has 89 places, 84 transitions, 244 flow. Second operand 10 states and 346 transitions. [2024-11-10 22:26:44,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 102 transitions, 518 flow [2024-11-10 22:26:44,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 102 transitions, 460 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-10 22:26:44,886 INFO L231 Difference]: Finished difference. Result has 96 places, 102 transitions, 384 flow [2024-11-10 22:26:44,887 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=384, PETRI_PLACES=96, PETRI_TRANSITIONS=102} [2024-11-10 22:26:44,887 INFO L277 CegarLoopForPetriNet]: 95 programPoint places, 1 predicate places. [2024-11-10 22:26:44,888 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 102 transitions, 384 flow [2024-11-10 22:26:44,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 27.083333333333332) internal successors, (325), 12 states have internal predecessors, (325), 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 22:26:44,888 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 22:26:44,888 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 22:26:44,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 22:26:45,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-10 22:26:45,093 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-10 22:26:45,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 22:26:45,094 INFO L85 PathProgramCache]: Analyzing trace with hash -101443928, now seen corresponding path program 1 times [2024-11-10 22:26:45,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 22:26:45,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547336971] [2024-11-10 22:26:45,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:26:45,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 22:26:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:26:45,221 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 22:26:45,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 22:26:45,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547336971] [2024-11-10 22:26:45,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547336971] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 22:26:45,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 22:26:45,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 22:26:45,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995333474] [2024-11-10 22:26:45,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 22:26:45,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 22:26:45,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 22:26:45,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 22:26:45,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 22:26:45,228 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 100 [2024-11-10 22:26:45,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 102 transitions, 384 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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 22:26:45,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 22:26:45,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 100 [2024-11-10 22:26:45,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand