./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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-bad-buffer-mult-alt2.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 a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 19:43:39,167 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 19:43:39,220 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2025-03-17 19:43:39,227 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 19:43:39,228 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 19:43:39,244 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 19:43:39,244 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 19:43:39,244 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 19:43:39,245 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 19:43:39,245 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 19:43:39,246 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 19:43:39,246 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 19:43:39,246 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 19:43:39,246 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 19:43:39,247 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 19:43:39,247 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 19:43:39,247 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 19:43:39,247 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 19:43:39,247 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 19:43:39,247 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 19:43:39,247 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 19:43:39,247 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 19:43:39,247 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 19:43:39,247 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 19:43:39,247 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-03-17 19:43:39,247 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 19:43:39,247 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 19:43:39,247 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 19:43:39,247 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 19:43:39,247 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 19:43:39,248 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 19:43:39,248 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 19:43:39,248 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 19:43:39,248 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 19:43:39,248 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 19:43:39,248 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 19:43:39,248 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 19:43:39,248 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 19:43:39,248 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 19:43:39,248 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 19:43:39,248 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 19:43:39,248 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 19:43:39,248 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 19:43:39,248 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 19:43:39,248 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 19:43:39,248 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/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 -> a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 [2025-03-17 19:43:39,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 19:43:39,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 19:43:39,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 19:43:39,472 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 19:43:39,472 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 19:43:39,473 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2025-03-17 19:43:40,703 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4426884f2/005a6680648a4ef6a3429e643a19a185/FLAGab3d0fbbb [2025-03-17 19:43:40,935 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 19:43:40,936 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2025-03-17 19:43:40,942 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4426884f2/005a6680648a4ef6a3429e643a19a185/FLAGab3d0fbbb [2025-03-17 19:43:41,282 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4426884f2/005a6680648a4ef6a3429e643a19a185 [2025-03-17 19:43:41,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 19:43:41,285 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 19:43:41,286 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 19:43:41,286 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 19:43:41,289 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 19:43:41,290 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:43:41" (1/1) ... [2025-03-17 19:43:41,290 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bda88bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:43:41, skipping insertion in model container [2025-03-17 19:43:41,290 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:43:41" (1/1) ... [2025-03-17 19:43:41,302 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 19:43:41,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 19:43:41,466 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 19:43:41,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 19:43:41,515 INFO L204 MainTranslator]: Completed translation [2025-03-17 19:43:41,516 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:43:41 WrapperNode [2025-03-17 19:43:41,516 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 19:43:41,516 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 19:43:41,517 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 19:43:41,517 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 19:43:41,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:43:41" (1/1) ... [2025-03-17 19:43:41,533 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:43:41" (1/1) ... [2025-03-17 19:43:41,573 INFO L138 Inliner]: procedures = 25, calls = 56, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 337 [2025-03-17 19:43:41,578 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 19:43:41,579 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 19:43:41,579 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 19:43:41,579 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 19:43:41,586 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:43:41" (1/1) ... [2025-03-17 19:43:41,587 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:43:41" (1/1) ... [2025-03-17 19:43:41,589 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:43:41" (1/1) ... [2025-03-17 19:43:41,618 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]. [2025-03-17 19:43:41,618 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:43:41" (1/1) ... [2025-03-17 19:43:41,619 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:43:41" (1/1) ... [2025-03-17 19:43:41,632 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:43:41" (1/1) ... [2025-03-17 19:43:41,633 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:43:41" (1/1) ... [2025-03-17 19:43:41,635 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:43:41" (1/1) ... [2025-03-17 19:43:41,644 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:43:41" (1/1) ... [2025-03-17 19:43:41,652 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 19:43:41,653 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 19:43:41,653 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 19:43:41,653 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 19:43:41,654 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:43:41" (1/1) ... [2025-03-17 19:43:41,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 19:43:41,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:43:41,681 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) [2025-03-17 19:43:41,683 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 [2025-03-17 19:43:41,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 19:43:41,704 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 19:43:41,704 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 19:43:41,704 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 19:43:41,704 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 19:43:41,704 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-17 19:43:41,704 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-17 19:43:41,704 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-03-17 19:43:41,704 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-03-17 19:43:41,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 19:43:41,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 19:43:41,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 19:43:41,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 19:43:41,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 19:43:41,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 19:43:41,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 19:43:41,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 19:43:41,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 19:43:41,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 19:43:41,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 19:43:41,706 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 19:43:41,805 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 19:43:41,807 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 19:43:42,243 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 19:43:42,243 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 19:43:42,717 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 19:43:42,717 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 19:43:42,718 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 07:43:42 BoogieIcfgContainer [2025-03-17 19:43:42,718 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 19:43:42,720 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 19:43:42,721 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 19:43:42,725 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 19:43:42,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 07:43:41" (1/3) ... [2025-03-17 19:43:42,727 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16e3b217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:43:42, skipping insertion in model container [2025-03-17 19:43:42,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:43:41" (2/3) ... [2025-03-17 19:43:42,727 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16e3b217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:43:42, skipping insertion in model container [2025-03-17 19:43:42,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 07:43:42" (3/3) ... [2025-03-17 19:43:42,729 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2025-03-17 19:43:42,743 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 19:43:42,746 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-buffer-mult-alt2.wvr.c that has 5 procedures, 75 locations, 1 initial locations, 6 loop locations, and 30 error locations. [2025-03-17 19:43:42,746 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 19:43:42,867 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-17 19:43:42,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 80 transitions, 188 flow [2025-03-17 19:43:42,932 INFO L124 PetriNetUnfolderBase]: 6/76 cut-off events. [2025-03-17 19:43:42,934 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-17 19:43:42,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 76 events. 6/76 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 240 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2025-03-17 19:43:42,938 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 80 transitions, 188 flow [2025-03-17 19:43:42,941 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 74 transitions, 169 flow [2025-03-17 19:43:42,948 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 19:43:42,958 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;@22726bf5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 19:43:42,958 INFO L334 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2025-03-17 19:43:42,962 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 19:43:42,962 INFO L124 PetriNetUnfolderBase]: 1/5 cut-off events. [2025-03-17 19:43:42,962 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 19:43:42,962 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:43:42,963 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 19:43:42,963 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2025-03-17 19:43:42,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:43:42,968 INFO L85 PathProgramCache]: Analyzing trace with hash 967759, now seen corresponding path program 1 times [2025-03-17 19:43:42,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:43:42,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986919362] [2025-03-17 19:43:42,975 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:43:42,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:43:43,030 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 19:43:43,054 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 19:43:43,055 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:43:43,055 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:43:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:43:43,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:43:43,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986919362] [2025-03-17 19:43:43,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986919362] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:43:43,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:43:43,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 19:43:43,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869274317] [2025-03-17 19:43:43,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:43:43,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 19:43:43,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:43:43,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 19:43:43,201 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 19:43:43,219 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 80 [2025-03-17 19:43:43,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 74 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:43:43,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:43:43,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 80 [2025-03-17 19:43:43,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:43:48,287 INFO L124 PetriNetUnfolderBase]: 41750/55192 cut-off events. [2025-03-17 19:43:48,287 INFO L125 PetriNetUnfolderBase]: For 1252/1252 co-relation queries the response was YES. [2025-03-17 19:43:48,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111349 conditions, 55192 events. 41750/55192 cut-off events. For 1252/1252 co-relation queries the response was YES. Maximal size of possible extension queue 3802. Compared 366435 event pairs, 36178 based on Foata normal form. 2/29919 useless extension candidates. Maximal degree in co-relation 104146. Up to 54049 conditions per place. [2025-03-17 19:43:48,690 INFO L140 encePairwiseOnDemand]: 64/80 looper letters, 48 selfloop transitions, 6 changer transitions 0/64 dead transitions. [2025-03-17 19:43:48,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 64 transitions, 257 flow [2025-03-17 19:43:48,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 19:43:48,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 19:43:48,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2025-03-17 19:43:48,702 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.375 [2025-03-17 19:43:48,703 INFO L175 Difference]: Start difference. First operand has 81 places, 74 transitions, 169 flow. Second operand 4 states and 120 transitions. [2025-03-17 19:43:48,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 64 transitions, 257 flow [2025-03-17 19:43:49,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 64 transitions, 244 flow, removed 0 selfloop flow, removed 7 redundant places. [2025-03-17 19:43:49,175 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 148 flow [2025-03-17 19:43:49,177 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2025-03-17 19:43:49,180 INFO L279 CegarLoopForPetriNet]: 81 programPoint places, -14 predicate places. [2025-03-17 19:43:49,180 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 148 flow [2025-03-17 19:43:49,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:43:49,181 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:43:49,181 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-03-17 19:43:49,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 19:43:49,182 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2025-03-17 19:43:49,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:43:49,183 INFO L85 PathProgramCache]: Analyzing trace with hash 30001466, now seen corresponding path program 1 times [2025-03-17 19:43:49,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:43:49,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856593139] [2025-03-17 19:43:49,184 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:43:49,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:43:49,197 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-03-17 19:43:49,221 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-03-17 19:43:49,222 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:43:49,222 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:43:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:43:49,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:43:49,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856593139] [2025-03-17 19:43:49,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856593139] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:43:49,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:43:49,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 19:43:49,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425053396] [2025-03-17 19:43:49,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:43:49,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 19:43:49,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:43:49,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 19:43:49,304 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 19:43:49,317 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 80 [2025-03-17 19:43:49,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:43:49,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:43:49,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 80 [2025-03-17 19:43:49,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:43:53,777 INFO L124 PetriNetUnfolderBase]: 41752/55200 cut-off events. [2025-03-17 19:43:53,777 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2025-03-17 19:43:53,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110481 conditions, 55200 events. 41752/55200 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 3802. Compared 366475 event pairs, 36178 based on Foata normal form. 2/29929 useless extension candidates. Maximal degree in co-relation 110433. Up to 54058 conditions per place. [2025-03-17 19:43:54,062 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 53 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2025-03-17 19:43:54,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 290 flow [2025-03-17 19:43:54,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 19:43:54,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 19:43:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2025-03-17 19:43:54,064 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36875 [2025-03-17 19:43:54,064 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 148 flow. Second operand 4 states and 118 transitions. [2025-03-17 19:43:54,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 290 flow [2025-03-17 19:43:54,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 70 transitions, 268 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 19:43:54,067 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 192 flow [2025-03-17 19:43:54,068 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2025-03-17 19:43:54,068 INFO L279 CegarLoopForPetriNet]: 81 programPoint places, -11 predicate places. [2025-03-17 19:43:54,068 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 192 flow [2025-03-17 19:43:54,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:43:54,069 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:43:54,069 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2025-03-17 19:43:54,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 19:43:54,069 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2025-03-17 19:43:54,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:43:54,069 INFO L85 PathProgramCache]: Analyzing trace with hash 421431279, now seen corresponding path program 1 times [2025-03-17 19:43:54,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:43:54,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553896069] [2025-03-17 19:43:54,070 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:43:54,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:43:54,076 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 19:43:54,090 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 19:43:54,091 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:43:54,091 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:43:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:43:54,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:43:54,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553896069] [2025-03-17 19:43:54,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553896069] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:43:54,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115030617] [2025-03-17 19:43:54,175 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:43:54,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:43:54,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:43:54,178 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) [2025-03-17 19:43:54,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 19:43:54,258 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 19:43:54,267 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 19:43:54,268 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:43:54,268 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:43:54,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 19:43:54,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:43:54,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:43:54,302 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:43:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:43:54,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115030617] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:43:54,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:43:54,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2025-03-17 19:43:54,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340380617] [2025-03-17 19:43:54,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:43:54,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 19:43:54,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:43:54,344 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 19:43:54,344 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2025-03-17 19:43:54,366 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 80 [2025-03-17 19:43:54,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 192 flow. Second operand has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:43:54,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:43:54,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 80 [2025-03-17 19:43:54,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:43:59,416 INFO L124 PetriNetUnfolderBase]: 41758/55224 cut-off events. [2025-03-17 19:43:59,416 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2025-03-17 19:43:59,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110557 conditions, 55224 events. 41758/55224 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 3802. Compared 366787 event pairs, 36178 based on Foata normal form. 0/29947 useless extension candidates. Maximal degree in co-relation 110444. Up to 54061 conditions per place. [2025-03-17 19:43:59,689 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 53 selfloop transitions, 25 changer transitions 0/88 dead transitions. [2025-03-17 19:43:59,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 88 transitions, 426 flow [2025-03-17 19:43:59,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 19:43:59,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 19:43:59,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2025-03-17 19:43:59,691 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28 [2025-03-17 19:43:59,691 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 192 flow. Second operand 10 states and 224 transitions. [2025-03-17 19:43:59,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 88 transitions, 426 flow [2025-03-17 19:43:59,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 88 transitions, 426 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 19:43:59,693 INFO L231 Difference]: Finished difference. Result has 82 places, 88 transitions, 354 flow [2025-03-17 19:43:59,693 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=354, PETRI_PLACES=82, PETRI_TRANSITIONS=88} [2025-03-17 19:43:59,693 INFO L279 CegarLoopForPetriNet]: 81 programPoint places, 1 predicate places. [2025-03-17 19:43:59,694 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 88 transitions, 354 flow [2025-03-17 19:43:59,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:43:59,694 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:43:59,694 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:43:59,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 19:43:59,894 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 [2025-03-17 19:43:59,895 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2025-03-17 19:43:59,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:43:59,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1547451399, now seen corresponding path program 1 times [2025-03-17 19:43:59,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:43:59,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64148185] [2025-03-17 19:43:59,895 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:43:59,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:43:59,903 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 19:43:59,920 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 19:43:59,921 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:43:59,921 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:00,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:44:00,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64148185] [2025-03-17 19:44:00,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64148185] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:44:00,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:44:00,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 19:44:00,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330612158] [2025-03-17 19:44:00,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:44:00,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 19:44:00,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:44:00,091 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 19:44:00,091 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 19:44:00,091 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 80 [2025-03-17 19:44:00,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 88 transitions, 354 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:00,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:44:00,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 80 [2025-03-17 19:44:00,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand