./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version c7c6ca5d 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-bad-buffer-mult-alt3.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 fdebcc32a5907a5601109dc3fb4ac7750aa88ce6953c83cffe48f47befc15286 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 15:11:12,035 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 15:11:12,105 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-11-09 15:11:12,109 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 15:11:12,110 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 15:11:12,136 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 15:11:12,136 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 15:11:12,137 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 15:11:12,137 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 15:11:12,138 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 15:11:12,139 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 15:11:12,139 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 15:11:12,140 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 15:11:12,140 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 15:11:12,141 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 15:11:12,142 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 15:11:12,142 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 15:11:12,142 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 15:11:12,142 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 15:11:12,143 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 15:11:12,143 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 15:11:12,146 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 15:11:12,146 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 15:11:12,146 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 15:11:12,147 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 15:11:12,147 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-09 15:11:12,147 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 15:11:12,147 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 15:11:12,147 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 15:11:12,148 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 15:11:12,148 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 15:11:12,148 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 15:11:12,148 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 15:11:12,148 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 15:11:12,148 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 15:11:12,149 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 15:11:12,149 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 15:11:12,149 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 15:11:12,149 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 15:11:12,149 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 15:11:12,150 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 15:11:12,150 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 15:11:12,150 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 15:11:12,151 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 15:11:12,151 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fdebcc32a5907a5601109dc3fb4ac7750aa88ce6953c83cffe48f47befc15286 [2024-11-09 15:11:12,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 15:11:12,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 15:11:12,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 15:11:12,369 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 15:11:12,369 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 15:11:12,370 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt3.wvr.c [2024-11-09 15:11:13,708 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 15:11:13,889 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 15:11:13,890 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt3.wvr.c [2024-11-09 15:11:13,896 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16b4eb2ea/3945d636a6be4458a643b212c16454ac/FLAGc10998ce8 [2024-11-09 15:11:13,909 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16b4eb2ea/3945d636a6be4458a643b212c16454ac [2024-11-09 15:11:13,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 15:11:13,913 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 15:11:13,914 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 15:11:13,914 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 15:11:13,920 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 15:11:13,921 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 03:11:13" (1/1) ... [2024-11-09 15:11:13,921 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bb9235f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:11:13, skipping insertion in model container [2024-11-09 15:11:13,921 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 03:11:13" (1/1) ... [2024-11-09 15:11:13,942 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 15:11:14,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 15:11:14,124 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 15:11:14,158 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 15:11:14,176 INFO L204 MainTranslator]: Completed translation [2024-11-09 15:11:14,176 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:11:14 WrapperNode [2024-11-09 15:11:14,177 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 15:11:14,178 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 15:11:14,178 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 15:11:14,178 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 15:11:14,187 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:11:14" (1/1) ... [2024-11-09 15:11:14,196 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:11:14" (1/1) ... [2024-11-09 15:11:14,221 INFO L138 Inliner]: procedures = 25, calls = 60, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 359 [2024-11-09 15:11:14,222 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 15:11:14,223 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 15:11:14,223 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 15:11:14,226 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 15:11:14,236 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:11:14" (1/1) ... [2024-11-09 15:11:14,236 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:11:14" (1/1) ... [2024-11-09 15:11:14,240 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:11:14" (1/1) ... [2024-11-09 15:11:14,259 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]. [2024-11-09 15:11:14,259 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:11:14" (1/1) ... [2024-11-09 15:11:14,260 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:11:14" (1/1) ... [2024-11-09 15:11:14,267 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:11:14" (1/1) ... [2024-11-09 15:11:14,271 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:11:14" (1/1) ... [2024-11-09 15:11:14,272 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:11:14" (1/1) ... [2024-11-09 15:11:14,274 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:11:14" (1/1) ... [2024-11-09 15:11:14,277 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 15:11:14,278 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 15:11:14,278 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 15:11:14,278 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 15:11:14,279 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:11:14" (1/1) ... [2024-11-09 15:11:14,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 15:11:14,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:11:14,314 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) [2024-11-09 15:11:14,317 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 [2024-11-09 15:11:14,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 15:11:14,353 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 15:11:14,353 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 15:11:14,354 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 15:11:14,354 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 15:11:14,354 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-09 15:11:14,354 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-09 15:11:14,354 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-09 15:11:14,354 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-09 15:11:14,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 15:11:14,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 15:11:14,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 15:11:14,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 15:11:14,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-09 15:11:14,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-09 15:11:14,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 15:11:14,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 15:11:14,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 15:11:14,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 15:11:14,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 15:11:14,357 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 15:11:14,496 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 15:11:14,499 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 15:11:14,927 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 15:11:14,927 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 15:11:15,332 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 15:11:15,333 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-09 15:11:15,333 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 03:11:15 BoogieIcfgContainer [2024-11-09 15:11:15,333 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 15:11:15,335 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 15:11:15,335 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 15:11:15,338 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 15:11:15,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 03:11:13" (1/3) ... [2024-11-09 15:11:15,339 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b897955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 03:11:15, skipping insertion in model container [2024-11-09 15:11:15,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 03:11:14" (2/3) ... [2024-11-09 15:11:15,339 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b897955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 03:11:15, skipping insertion in model container [2024-11-09 15:11:15,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 03:11:15" (3/3) ... [2024-11-09 15:11:15,340 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt3.wvr.c [2024-11-09 15:11:15,354 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 15:11:15,355 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2024-11-09 15:11:15,355 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 15:11:15,491 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-09 15:11:15,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 82 transitions, 192 flow [2024-11-09 15:11:15,579 INFO L124 PetriNetUnfolderBase]: 6/78 cut-off events. [2024-11-09 15:11:15,580 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-09 15:11:15,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 78 events. 6/78 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 265 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 65. Up to 2 conditions per place. [2024-11-09 15:11:15,584 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 82 transitions, 192 flow [2024-11-09 15:11:15,588 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 76 transitions, 173 flow [2024-11-09 15:11:15,599 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 15:11:15,606 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;@f335c3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 15:11:15,607 INFO L334 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2024-11-09 15:11:15,611 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 15:11:15,611 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-11-09 15:11:15,611 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 15:11:15,612 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 15:11:15,612 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 15:11:15,613 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-09 15:11:15,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 15:11:15,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1093182, now seen corresponding path program 1 times [2024-11-09 15:11:15,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 15:11:15,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359094165] [2024-11-09 15:11:15,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 15:11:15,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 15:11:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 15:11:15,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 15:11:15,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 15:11:15,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359094165] [2024-11-09 15:11:15,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359094165] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 15:11:15,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 15:11:15,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 15:11:15,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404575942] [2024-11-09 15:11:15,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 15:11:15,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 15:11:15,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 15:11:15,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 15:11:15,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 15:11:15,898 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 82 [2024-11-09 15:11:15,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 76 transitions, 173 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2024-11-09 15:11:15,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 15:11:15,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 82 [2024-11-09 15:11:15,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 15:11:23,395 INFO L124 PetriNetUnfolderBase]: 50181/66541 cut-off events. [2024-11-09 15:11:23,396 INFO L125 PetriNetUnfolderBase]: For 1336/1336 co-relation queries the response was YES. [2024-11-09 15:11:23,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130830 conditions, 66541 events. 50181/66541 cut-off events. For 1336/1336 co-relation queries the response was YES. Maximal size of possible extension queue 6940. Compared 481269 event pairs, 36482 based on Foata normal form. 2/28923 useless extension candidates. Maximal degree in co-relation 124248. Up to 62109 conditions per place. [2024-11-09 15:11:23,849 INFO L140 encePairwiseOnDemand]: 65/82 looper letters, 51 selfloop transitions, 7 changer transitions 0/76 dead transitions. [2024-11-09 15:11:23,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 76 transitions, 289 flow [2024-11-09 15:11:23,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 15:11:23,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 15:11:23,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 156 transitions. [2024-11-09 15:11:23,859 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-11-09 15:11:23,860 INFO L175 Difference]: Start difference. First operand has 83 places, 76 transitions, 173 flow. Second operand 4 states and 156 transitions. [2024-11-09 15:11:23,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 76 transitions, 289 flow [2024-11-09 15:11:23,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 276 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-09 15:11:23,960 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 208 flow [2024-11-09 15:11:23,961 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2024-11-09 15:11:23,964 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -7 predicate places. [2024-11-09 15:11:23,964 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 208 flow [2024-11-09 15:11:23,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2024-11-09 15:11:23,964 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 15:11:23,964 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-09 15:11:23,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 15:11:23,965 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-09 15:11:23,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 15:11:23,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1791640043, now seen corresponding path program 1 times [2024-11-09 15:11:23,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 15:11:23,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942529043] [2024-11-09 15:11:23,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 15:11:23,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 15:11:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 15:11:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 15:11:24,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 15:11:24,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942529043] [2024-11-09 15:11:24,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942529043] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 15:11:24,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638457687] [2024-11-09 15:11:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 15:11:24,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 15:11:24,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:11:24,132 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) [2024-11-09 15:11:24,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 15:11:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 15:11:24,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 15:11:24,244 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 15:11:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 15:11:24,285 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 15:11:24,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638457687] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 15:11:24,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 15:11:24,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-09 15:11:24,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427609913] [2024-11-09 15:11:24,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 15:11:24,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 15:11:24,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 15:11:24,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 15:11:24,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-09 15:11:24,300 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 82 [2024-11-09 15:11:24,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 208 flow. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 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) [2024-11-09 15:11:24,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 15:11:24,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 82 [2024-11-09 15:11:24,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 15:11:30,581 INFO L124 PetriNetUnfolderBase]: 50181/66539 cut-off events. [2024-11-09 15:11:30,581 INFO L125 PetriNetUnfolderBase]: For 201/201 co-relation queries the response was YES. [2024-11-09 15:11:30,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130046 conditions, 66539 events. 50181/66539 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 6940. Compared 481029 event pairs, 36482 based on Foata normal form. 2/28924 useless extension candidates. Maximal degree in co-relation 129996. Up to 62099 conditions per place. [2024-11-09 15:11:30,954 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 44 selfloop transitions, 12 changer transitions 0/74 dead transitions. [2024-11-09 15:11:30,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 74 transitions, 312 flow [2024-11-09 15:11:30,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 15:11:30,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 15:11:30,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-11-09 15:11:30,957 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3861788617886179 [2024-11-09 15:11:30,957 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 208 flow. Second operand 6 states and 190 transitions. [2024-11-09 15:11:30,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 74 transitions, 312 flow [2024-11-09 15:11:30,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 74 transitions, 312 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-09 15:11:30,959 INFO L231 Difference]: Finished difference. Result has 79 places, 74 transitions, 224 flow [2024-11-09 15:11:30,959 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=224, PETRI_PLACES=79, PETRI_TRANSITIONS=74} [2024-11-09 15:11:30,960 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -4 predicate places. [2024-11-09 15:11:30,960 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 74 transitions, 224 flow [2024-11-09 15:11:30,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 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) [2024-11-09 15:11:30,960 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 15:11:30,960 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-09 15:11:30,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 15:11:31,164 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 [2024-11-09 15:11:31,165 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-09 15:11:31,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 15:11:31,166 INFO L85 PathProgramCache]: Analyzing trace with hash 293734636, now seen corresponding path program 1 times [2024-11-09 15:11:31,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 15:11:31,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104774589] [2024-11-09 15:11:31,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 15:11:31,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 15:11:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 15:11:31,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 15:11:31,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 15:11:31,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104774589] [2024-11-09 15:11:31,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104774589] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 15:11:31,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517040809] [2024-11-09 15:11:31,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 15:11:31,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 15:11:31,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 15:11:31,265 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) [2024-11-09 15:11:31,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 15:11:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 15:11:31,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 15:11:31,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 15:11:31,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 15:11:31,379 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 15:11:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 15:11:31,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517040809] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 15:11:31,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 15:11:31,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-09 15:11:31,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948736522] [2024-11-09 15:11:31,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 15:11:31,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 15:11:31,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 15:11:31,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 15:11:31,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-09 15:11:31,433 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 82 [2024-11-09 15:11:31,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 74 transitions, 224 flow. Second operand has 12 states, 12 states have (on average 23.083333333333332) internal successors, (277), 12 states have internal predecessors, (277), 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) [2024-11-09 15:11:31,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 15:11:31,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 82 [2024-11-09 15:11:31,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 15:11:37,960 INFO L124 PetriNetUnfolderBase]: 50187/66563 cut-off events. [2024-11-09 15:11:37,961 INFO L125 PetriNetUnfolderBase]: For 243/243 co-relation queries the response was YES. [2024-11-09 15:11:38,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130140 conditions, 66563 events. 50187/66563 cut-off events. For 243/243 co-relation queries the response was YES. Maximal size of possible extension queue 6940. Compared 481803 event pairs, 36482 based on Foata normal form. 6/28951 useless extension candidates. Maximal degree in co-relation 129998. Up to 62110 conditions per place. [2024-11-09 15:11:38,371 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 49 selfloop transitions, 25 changer transitions 0/92 dead transitions. [2024-11-09 15:11:38,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 92 transitions, 486 flow [2024-11-09 15:11:38,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 15:11:38,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 15:11:38,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 300 transitions. [2024-11-09 15:11:38,374 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-11-09 15:11:38,374 INFO L175 Difference]: Start difference. First operand has 79 places, 74 transitions, 224 flow. Second operand 10 states and 300 transitions. [2024-11-09 15:11:38,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 92 transitions, 486 flow [2024-11-09 15:11:38,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 92 transitions, 428 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-09 15:11:38,377 INFO L231 Difference]: Finished difference. Result has 86 places, 92 transitions, 364 flow [2024-11-09 15:11:38,377 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=364, PETRI_PLACES=86, PETRI_TRANSITIONS=92} [2024-11-09 15:11:38,378 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 3 predicate places. [2024-11-09 15:11:38,378 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 92 transitions, 364 flow [2024-11-09 15:11:38,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 23.083333333333332) internal successors, (277), 12 states have internal predecessors, (277), 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) [2024-11-09 15:11:38,378 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 15:11:38,378 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 15:11:38,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 15:11:38,582 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 [2024-11-09 15:11:38,583 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-09 15:11:38,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 15:11:38,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1626261758, now seen corresponding path program 1 times [2024-11-09 15:11:38,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 15:11:38,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126973559] [2024-11-09 15:11:38,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 15:11:38,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 15:11:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 15:11:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 15:11:38,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 15:11:38,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126973559] [2024-11-09 15:11:38,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126973559] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 15:11:38,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 15:11:38,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 15:11:38,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437759444] [2024-11-09 15:11:38,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 15:11:38,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 15:11:38,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 15:11:38,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 15:11:38,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 15:11:38,665 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 82 [2024-11-09 15:11:38,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 92 transitions, 364 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2024-11-09 15:11:38,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 15:11:38,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 82 [2024-11-09 15:11:38,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand