./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 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-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-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 22:24:44,122 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 22:24:44,180 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-11-10 22:24:44,185 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 22:24:44,186 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 22:24:44,206 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 22:24:44,207 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 22:24:44,207 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 22:24:44,207 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 22:24:44,207 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 22:24:44,208 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 22:24:44,208 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 22:24:44,208 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 22:24:44,209 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 22:24:44,209 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 22:24:44,209 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 22:24:44,209 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 22:24:44,209 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 22:24:44,210 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 22:24:44,210 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 22:24:44,210 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 22:24:44,213 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 22:24:44,213 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 22:24:44,213 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 22:24:44,213 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 22:24:44,213 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-10 22:24:44,213 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 22:24:44,214 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 22:24:44,214 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 22:24:44,214 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 22:24:44,214 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 22:24:44,214 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 22:24:44,214 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 22:24:44,215 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 22:24:44,215 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 22:24:44,215 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 22:24:44,215 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 22:24:44,215 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 22:24:44,215 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 22:24:44,216 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 22:24:44,216 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 22:24:44,219 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 22:24:44,219 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 22:24:44,219 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 22:24:44,219 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fdebcc32a5907a5601109dc3fb4ac7750aa88ce6953c83cffe48f47befc15286 [2024-11-10 22:24:44,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 22:24:44,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 22:24:44,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 22:24:44,438 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 22:24:44,439 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 22:24:44,440 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt3.wvr.c [2024-11-10 22:24:45,651 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 22:24:45,816 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 22:24:45,816 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt3.wvr.c [2024-11-10 22:24:45,826 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/214b882ea/4416517a534f43ef8032ce3c30586e67/FLAG4f4e80063 [2024-11-10 22:24:45,841 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/214b882ea/4416517a534f43ef8032ce3c30586e67 [2024-11-10 22:24:45,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 22:24:45,845 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 22:24:45,847 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 22:24:45,848 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 22:24:45,853 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 22:24:45,855 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:24:45" (1/1) ... [2024-11-10 22:24:45,856 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34bd4d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:24:45, skipping insertion in model container [2024-11-10 22:24:45,856 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:24:45" (1/1) ... [2024-11-10 22:24:45,881 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 22:24:46,072 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 22:24:46,079 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 22:24:46,101 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 22:24:46,114 INFO L204 MainTranslator]: Completed translation [2024-11-10 22:24:46,114 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:24:46 WrapperNode [2024-11-10 22:24:46,114 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 22:24:46,115 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 22:24:46,115 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 22:24:46,115 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 22:24:46,121 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:24:46" (1/1) ... [2024-11-10 22:24:46,127 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:24:46" (1/1) ... [2024-11-10 22:24:46,153 INFO L138 Inliner]: procedures = 25, calls = 60, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 353 [2024-11-10 22:24:46,154 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 22:24:46,154 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 22:24:46,154 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 22:24:46,154 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 22:24:46,162 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:24:46" (1/1) ... [2024-11-10 22:24:46,162 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:24:46" (1/1) ... [2024-11-10 22:24:46,165 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:24:46" (1/1) ... [2024-11-10 22:24:46,178 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-10 22:24:46,180 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:24:46" (1/1) ... [2024-11-10 22:24:46,181 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:24:46" (1/1) ... [2024-11-10 22:24:46,194 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:24:46" (1/1) ... [2024-11-10 22:24:46,195 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:24:46" (1/1) ... [2024-11-10 22:24:46,196 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:24:46" (1/1) ... [2024-11-10 22:24:46,198 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:24:46" (1/1) ... [2024-11-10 22:24:46,204 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 22:24:46,205 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 22:24:46,205 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 22:24:46,205 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 22:24:46,205 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:24:46" (1/1) ... [2024-11-10 22:24:46,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 22:24:46,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 22:24:46,236 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-10 22:24:46,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-10 22:24:46,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 22:24:46,273 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 22:24:46,273 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 22:24:46,273 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 22:24:46,273 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 22:24:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-10 22:24:46,274 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-10 22:24:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-10 22:24:46,274 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-10 22:24:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 22:24:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 22:24:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 22:24:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 22:24:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-10 22:24:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-10 22:24:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 22:24:46,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 22:24:46,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 22:24:46,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 22:24:46,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 22:24:46,279 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 22:24:46,400 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 22:24:46,403 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 22:24:46,834 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 22:24:46,835 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 22:24:47,227 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 22:24:47,227 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 22:24:47,227 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:24:47 BoogieIcfgContainer [2024-11-10 22:24:47,227 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 22:24:47,229 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 22:24:47,229 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 22:24:47,232 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 22:24:47,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:24:45" (1/3) ... [2024-11-10 22:24:47,233 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6185734d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:24:47, skipping insertion in model container [2024-11-10 22:24:47,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:24:46" (2/3) ... [2024-11-10 22:24:47,235 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6185734d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:24:47, skipping insertion in model container [2024-11-10 22:24:47,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:24:47" (3/3) ... [2024-11-10 22:24:47,236 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt3.wvr.c [2024-11-10 22:24:47,249 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 22:24:47,250 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2024-11-10 22:24:47,250 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 22:24:47,370 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-10 22:24:47,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 100 transitions, 228 flow [2024-11-10 22:24:47,441 INFO L124 PetriNetUnfolderBase]: 12/96 cut-off events. [2024-11-10 22:24:47,442 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-10 22:24:47,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 96 events. 12/96 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 301 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 78. Up to 2 conditions per place. [2024-11-10 22:24:47,446 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 100 transitions, 228 flow [2024-11-10 22:24:47,449 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 94 transitions, 209 flow [2024-11-10 22:24:47,458 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 22:24:47,464 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;@50b692c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 22:24:47,464 INFO L334 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2024-11-10 22:24:47,468 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 22:24:47,468 INFO L124 PetriNetUnfolderBase]: 2/8 cut-off events. [2024-11-10 22:24:47,468 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 22:24:47,468 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 22:24:47,468 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 22:24:47,469 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-10 22:24:47,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 22:24:47,473 INFO L85 PathProgramCache]: Analyzing trace with hash 30415091, now seen corresponding path program 1 times [2024-11-10 22:24:47,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 22:24:47,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408875019] [2024-11-10 22:24:47,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:24:47,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 22:24:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:24:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:24:47,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 22:24:47,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408875019] [2024-11-10 22:24:47,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408875019] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 22:24:47,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 22:24:47,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 22:24:47,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577370652] [2024-11-10 22:24:47,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 22:24:47,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 22:24:47,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 22:24:47,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 22:24:47,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 22:24:47,829 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 100 [2024-11-10 22:24:47,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 94 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 22:24:47,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 22:24:47,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 100 [2024-11-10 22:24:47,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 22:24:56,066 INFO L124 PetriNetUnfolderBase]: 64742/86596 cut-off events. [2024-11-10 22:24:56,066 INFO L125 PetriNetUnfolderBase]: For 1980/1980 co-relation queries the response was YES. [2024-11-10 22:24:56,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173355 conditions, 86596 events. 64742/86596 cut-off events. For 1980/1980 co-relation queries the response was YES. Maximal size of possible extension queue 6777. Compared 647582 event pairs, 57036 based on Foata normal form. 7708/52544 useless extension candidates. Maximal degree in co-relation 164668. Up to 83768 conditions per place. [2024-11-10 22:24:56,590 INFO L140 encePairwiseOnDemand]: 77/100 looper letters, 59 selfloop transitions, 7 changer transitions 0/88 dead transitions. [2024-11-10 22:24:56,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 88 transitions, 329 flow [2024-11-10 22:24:56,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 22:24:56,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 22:24:56,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 188 transitions. [2024-11-10 22:24:56,603 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-11-10 22:24:56,604 INFO L175 Difference]: Start difference. First operand has 95 places, 94 transitions, 209 flow. Second operand 4 states and 188 transitions. [2024-11-10 22:24:56,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 88 transitions, 329 flow [2024-11-10 22:24:56,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 88 transitions, 316 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-10 22:24:56,720 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 232 flow [2024-11-10 22:24:56,721 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2024-11-10 22:24:56,723 INFO L277 CegarLoopForPetriNet]: 95 programPoint places, -7 predicate places. [2024-11-10 22:24:56,724 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 232 flow [2024-11-10 22:24:56,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 22:24:56,724 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 22:24:56,724 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-10 22:24:56,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 22:24:56,725 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-10 22:24:56,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 22:24:56,726 INFO L85 PathProgramCache]: Analyzing trace with hash -82173216, now seen corresponding path program 1 times [2024-11-10 22:24:56,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 22:24:56,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178155554] [2024-11-10 22:24:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:24:56,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 22:24:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:24:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:24:56,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 22:24:56,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178155554] [2024-11-10 22:24:56,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178155554] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 22:24:56,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547835724] [2024-11-10 22:24:56,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:24:56,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 22:24:56,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 22:24:56,855 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 22:24:56,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 22:24:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:24:56,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-10 22:24:56,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 22:24:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:24:56,989 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 22:24:56,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547835724] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 22:24:56,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 22:24:56,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-10 22:24:56,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138107788] [2024-11-10 22:24:56,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 22:24:56,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 22:24:56,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 22:24:56,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 22:24:56,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-10 22:24:57,025 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 100 [2024-11-10 22:24:57,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 232 flow. Second operand has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 22:24:57,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 22:24:57,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 100 [2024-11-10 22:24:57,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 22:25:04,483 INFO L124 PetriNetUnfolderBase]: 64742/86594 cut-off events. [2024-11-10 22:25:04,483 INFO L125 PetriNetUnfolderBase]: For 267/267 co-relation queries the response was YES. [2024-11-10 22:25:04,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172282 conditions, 86594 events. 64742/86594 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 6686. Compared 647105 event pairs, 57036 based on Foata normal form. 2/44836 useless extension candidates. Maximal degree in co-relation 172228. Up to 83758 conditions per place. [2024-11-10 22:25:05,271 INFO L140 encePairwiseOnDemand]: 91/100 looper letters, 52 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2024-11-10 22:25:05,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 86 transitions, 352 flow [2024-11-10 22:25:05,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 22:25:05,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 22:25:05,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 222 transitions. [2024-11-10 22:25:05,275 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37 [2024-11-10 22:25:05,275 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 232 flow. Second operand 6 states and 222 transitions. [2024-11-10 22:25:05,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 86 transitions, 352 flow [2024-11-10 22:25:05,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 86 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 22:25:05,278 INFO L231 Difference]: Finished difference. Result has 91 places, 86 transitions, 248 flow [2024-11-10 22:25:05,278 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=248, PETRI_PLACES=91, PETRI_TRANSITIONS=86} [2024-11-10 22:25:05,279 INFO L277 CegarLoopForPetriNet]: 95 programPoint places, -4 predicate places. [2024-11-10 22:25:05,279 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 86 transitions, 248 flow [2024-11-10 22:25:05,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 22:25:05,280 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 22:25:05,280 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1] [2024-11-10 22:25:05,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 22:25:05,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 22:25:05,482 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-10 22:25:05,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 22:25:05,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1747598532, now seen corresponding path program 1 times [2024-11-10 22:25:05,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 22:25:05,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515424579] [2024-11-10 22:25:05,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:25:05,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 22:25:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:25:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:25:05,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 22:25:05,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515424579] [2024-11-10 22:25:05,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515424579] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 22:25:05,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036172421] [2024-11-10 22:25:05,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:25:05,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 22:25:05,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 22:25:05,570 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 22:25:05,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 22:25:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:25:05,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-10 22:25:05,651 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 22:25:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:25:05,678 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 22:25:05,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:25:05,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036172421] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 22:25:05,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 22:25:05,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-10 22:25:05,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052570772] [2024-11-10 22:25:05,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 22:25:05,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 22:25:05,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 22:25:05,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 22:25:05,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-10 22:25:05,758 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 100 [2024-11-10 22:25:05,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 86 transitions, 248 flow. Second operand has 12 states, 12 states have (on average 27.083333333333332) internal successors, (325), 12 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 22:25:05,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 22:25:05,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 100 [2024-11-10 22:25:05,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand