./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 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/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.dk.eval-assert-order-craig-803cd42-m [2024-11-23 01:57:59,978 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 01:58:00,055 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-11-23 01:58:00,061 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 01:58:00,064 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 01:58:00,083 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 01:58:00,084 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 01:58:00,084 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 01:58:00,084 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 01:58:00,085 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 01:58:00,085 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 01:58:00,085 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 01:58:00,086 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 01:58:00,086 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 01:58:00,086 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 01:58:00,087 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 01:58:00,088 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-23 01:58:00,089 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 01:58:00,089 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 01:58:00,089 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 01:58:00,090 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 01:58:00,090 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-23 01:58:00,090 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 01:58:00,091 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-23 01:58:00,091 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-23 01:58:00,091 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-23 01:58:00,092 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 01:58:00,092 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 01:58:00,092 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-23 01:58:00,093 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 01:58:00,093 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 01:58:00,093 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 01:58:00,094 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 01:58:00,094 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 01:58:00,094 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 01:58:00,095 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 01:58:00,095 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 01:58:00,095 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-23 01:58:00,095 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 01:58:00,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 01:58:00,098 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 01:58:00,099 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 01:58:00,099 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 01:58:00,100 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 01:58:00,101 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fdebcc32a5907a5601109dc3fb4ac7750aa88ce6953c83cffe48f47befc15286 [2024-11-23 01:58:00,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 01:58:00,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 01:58:00,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 01:58:00,422 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 01:58:00,423 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 01:58:00,424 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt3.wvr.c [2024-11-23 01:58:01,928 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-23 01:58:02,154 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 01:58:02,155 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt3.wvr.c [2024-11-23 01:58:02,165 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6afbb9076/470d59e10d82440caf9394433a53df32/FLAG9252ffd61 [2024-11-23 01:58:02,179 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6afbb9076/470d59e10d82440caf9394433a53df32 [2024-11-23 01:58:02,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 01:58:02,183 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 01:58:02,184 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 01:58:02,184 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 01:58:02,189 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 01:58:02,189 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:58:02" (1/1) ... [2024-11-23 01:58:02,190 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dc405f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:02, skipping insertion in model container [2024-11-23 01:58:02,190 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:58:02" (1/1) ... [2024-11-23 01:58:02,218 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 01:58:02,442 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 01:58:02,460 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 01:58:02,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 01:58:02,529 INFO L204 MainTranslator]: Completed translation [2024-11-23 01:58:02,529 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:02 WrapperNode [2024-11-23 01:58:02,529 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 01:58:02,530 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 01:58:02,531 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 01:58:02,531 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 01:58:02,537 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:02" (1/1) ... [2024-11-23 01:58:02,546 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:02" (1/1) ... [2024-11-23 01:58:02,580 INFO L138 Inliner]: procedures = 25, calls = 60, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 359 [2024-11-23 01:58:02,581 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 01:58:02,581 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 01:58:02,582 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 01:58:02,582 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 01:58:02,597 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:02" (1/1) ... [2024-11-23 01:58:02,597 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:02" (1/1) ... [2024-11-23 01:58:02,602 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:02" (1/1) ... [2024-11-23 01:58:02,623 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]. [2024-11-23 01:58:02,624 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:02" (1/1) ... [2024-11-23 01:58:02,624 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:02" (1/1) ... [2024-11-23 01:58:02,640 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:02" (1/1) ... [2024-11-23 01:58:02,660 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:02" (1/1) ... [2024-11-23 01:58:02,670 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:02" (1/1) ... [2024-11-23 01:58:02,672 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:02" (1/1) ... [2024-11-23 01:58:02,679 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 01:58:02,680 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 01:58:02,680 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 01:58:02,681 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 01:58:02,681 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:02" (1/1) ... [2024-11-23 01:58:02,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 01:58:02,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-23 01:58:02,757 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) [2024-11-23 01:58:02,763 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 [2024-11-23 01:58:02,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 01:58:02,810 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 01:58:02,810 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 01:58:02,810 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 01:58:02,810 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 01:58:02,811 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-23 01:58:02,811 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-23 01:58:02,811 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-23 01:58:02,811 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-23 01:58:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 01:58:02,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 01:58:02,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 01:58:02,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 01:58:02,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-23 01:58:02,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-23 01:58:02,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 01:58:02,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 01:58:02,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 01:58:02,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 01:58:02,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 01:58:02,817 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 01:58:02,947 INFO L238 CfgBuilder]: Building ICFG [2024-11-23 01:58:02,949 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 01:58:03,471 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 01:58:03,472 INFO L287 CfgBuilder]: Performing block encoding [2024-11-23 01:58:04,081 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 01:58:04,081 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-23 01:58:04,082 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:58:04 BoogieIcfgContainer [2024-11-23 01:58:04,082 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 01:58:04,086 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 01:58:04,086 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 01:58:04,090 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 01:58:04,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:58:02" (1/3) ... [2024-11-23 01:58:04,091 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29ac1179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:58:04, skipping insertion in model container [2024-11-23 01:58:04,091 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:02" (2/3) ... [2024-11-23 01:58:04,093 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29ac1179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:58:04, skipping insertion in model container [2024-11-23 01:58:04,093 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:58:04" (3/3) ... [2024-11-23 01:58:04,094 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt3.wvr.c [2024-11-23 01:58:04,114 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 01:58:04,115 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2024-11-23 01:58:04,115 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 01:58:04,284 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-23 01:58:04,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 82 transitions, 192 flow [2024-11-23 01:58:04,377 INFO L124 PetriNetUnfolderBase]: 6/78 cut-off events. [2024-11-23 01:58:04,377 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-23 01:58:04,384 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. [2024-11-23 01:58:04,384 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 82 transitions, 192 flow [2024-11-23 01:58:04,389 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 76 transitions, 173 flow [2024-11-23 01:58:04,402 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 01:58:04,413 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;@531faf2e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 01:58:04,414 INFO L334 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2024-11-23 01:58:04,419 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 01:58:04,419 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-11-23 01:58:04,419 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 01:58:04,419 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-23 01:58:04,420 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 01:58:04,420 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-23 01:58:04,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 01:58:04,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1093182, now seen corresponding path program 1 times [2024-11-23 01:58:04,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 01:58:04,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659834823] [2024-11-23 01:58:04,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 01:58:04,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 01:58:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 01:58:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 01:58:04,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 01:58:04,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659834823] [2024-11-23 01:58:04,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659834823] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 01:58:04,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 01:58:04,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 01:58:04,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276025444] [2024-11-23 01:58:04,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 01:58:04,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 01:58:04,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 01:58:04,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 01:58:04,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 01:58:04,775 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 82 [2024-11-23 01:58:04,778 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) [2024-11-23 01:58:04,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 01:58:04,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 82 [2024-11-23 01:58:04,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 01:58:13,669 INFO L124 PetriNetUnfolderBase]: 50181/66541 cut-off events. [2024-11-23 01:58:13,669 INFO L125 PetriNetUnfolderBase]: For 1336/1336 co-relation queries the response was YES. [2024-11-23 01:58:13,887 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. [2024-11-23 01:58:14,382 INFO L140 encePairwiseOnDemand]: 65/82 looper letters, 51 selfloop transitions, 7 changer transitions 0/76 dead transitions. [2024-11-23 01:58:14,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 76 transitions, 289 flow [2024-11-23 01:58:14,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 01:58:14,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 01:58:14,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 156 transitions. [2024-11-23 01:58:14,397 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-11-23 01:58:14,400 INFO L175 Difference]: Start difference. First operand has 83 places, 76 transitions, 173 flow. Second operand 4 states and 156 transitions. [2024-11-23 01:58:14,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 76 transitions, 289 flow [2024-11-23 01:58:14,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 276 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-23 01:58:14,511 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 208 flow [2024-11-23 01:58:14,513 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} [2024-11-23 01:58:14,517 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -7 predicate places. [2024-11-23 01:58:14,520 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 208 flow [2024-11-23 01:58:14,520 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) [2024-11-23 01:58:14,521 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-23 01:58:14,521 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-23 01:58:14,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 01:58:14,522 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-23 01:58:14,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 01:58:14,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1791640043, now seen corresponding path program 1 times [2024-11-23 01:58:14,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 01:58:14,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344850809] [2024-11-23 01:58:14,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 01:58:14,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 01:58:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 01:58:14,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 01:58:14,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 01:58:14,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344850809] [2024-11-23 01:58:14,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344850809] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 01:58:14,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421226247] [2024-11-23 01:58:14,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 01:58:14,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 01:58:14,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-23 01:58:14,727 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) [2024-11-23 01:58:14,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 01:58:14,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 01:58:14,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 01:58:14,853 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 01:58:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 01:58:14,906 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 01:58:14,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421226247] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 01:58:14,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 01:58:14,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-23 01:58:14,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326815425] [2024-11-23 01:58:14,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 01:58:14,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 01:58:14,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 01:58:14,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 01:58:14,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-23 01:58:14,932 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 82 [2024-11-23 01:58:14,933 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) [2024-11-23 01:58:14,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 01:58:14,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 82 [2024-11-23 01:58:14,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 01:58:22,297 INFO L124 PetriNetUnfolderBase]: 50181/66539 cut-off events. [2024-11-23 01:58:22,297 INFO L125 PetriNetUnfolderBase]: For 201/201 co-relation queries the response was YES. [2024-11-23 01:58:22,466 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. [2024-11-23 01:58:22,848 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 44 selfloop transitions, 12 changer transitions 0/74 dead transitions. [2024-11-23 01:58:22,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 74 transitions, 312 flow [2024-11-23 01:58:22,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 01:58:22,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 01:58:22,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-11-23 01:58:22,851 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3861788617886179 [2024-11-23 01:58:22,851 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 208 flow. Second operand 6 states and 190 transitions. [2024-11-23 01:58:22,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 74 transitions, 312 flow [2024-11-23 01:58:22,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 74 transitions, 312 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-23 01:58:22,857 INFO L231 Difference]: Finished difference. Result has 79 places, 74 transitions, 224 flow [2024-11-23 01:58:22,858 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} [2024-11-23 01:58:22,858 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -4 predicate places. [2024-11-23 01:58:22,859 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 74 transitions, 224 flow [2024-11-23 01:58:22,860 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) [2024-11-23 01:58:22,860 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-23 01:58:22,860 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-23 01:58:22,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-23 01:58:23,061 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 [2024-11-23 01:58:23,062 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-23 01:58:23,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 01:58:23,063 INFO L85 PathProgramCache]: Analyzing trace with hash 293734636, now seen corresponding path program 1 times [2024-11-23 01:58:23,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 01:58:23,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620979559] [2024-11-23 01:58:23,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 01:58:23,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 01:58:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 01:58:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 01:58:23,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 01:58:23,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620979559] [2024-11-23 01:58:23,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620979559] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 01:58:23,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908074806] [2024-11-23 01:58:23,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 01:58:23,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 01:58:23,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-23 01:58:23,224 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) [2024-11-23 01:58:23,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 01:58:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 01:58:23,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 01:58:23,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 01:58:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 01:58:23,379 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 01:58:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 01:58:23,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908074806] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 01:58:23,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 01:58:23,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-23 01:58:23,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691010223] [2024-11-23 01:58:23,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 01:58:23,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-23 01:58:23,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 01:58:23,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-23 01:58:23,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-23 01:58:23,455 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 82 [2024-11-23 01:58:23,456 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) [2024-11-23 01:58:23,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 01:58:23,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 82 [2024-11-23 01:58:23,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 01:58:30,216 INFO L124 PetriNetUnfolderBase]: 50187/66563 cut-off events. [2024-11-23 01:58:30,216 INFO L125 PetriNetUnfolderBase]: For 243/243 co-relation queries the response was YES. [2024-11-23 01:58:30,383 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. [2024-11-23 01:58:30,784 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 49 selfloop transitions, 25 changer transitions 0/92 dead transitions. [2024-11-23 01:58:30,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 92 transitions, 486 flow [2024-11-23 01:58:30,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 01:58:30,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-23 01:58:30,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 300 transitions. [2024-11-23 01:58:30,787 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-11-23 01:58:30,787 INFO L175 Difference]: Start difference. First operand has 79 places, 74 transitions, 224 flow. Second operand 10 states and 300 transitions. [2024-11-23 01:58:30,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 92 transitions, 486 flow [2024-11-23 01:58:30,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 92 transitions, 428 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-23 01:58:30,791 INFO L231 Difference]: Finished difference. Result has 86 places, 92 transitions, 364 flow [2024-11-23 01:58:30,791 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} [2024-11-23 01:58:30,792 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 3 predicate places. [2024-11-23 01:58:30,792 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 92 transitions, 364 flow [2024-11-23 01:58:30,792 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) [2024-11-23 01:58:30,792 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-23 01:58:30,793 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 01:58:30,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-23 01:58:30,996 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 [2024-11-23 01:58:30,997 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-23 01:58:30,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 01:58:30,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1626261758, now seen corresponding path program 1 times [2024-11-23 01:58:30,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 01:58:30,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89668006] [2024-11-23 01:58:30,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 01:58:30,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 01:58:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 01:58:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 01:58:31,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 01:58:31,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89668006] [2024-11-23 01:58:31,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89668006] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 01:58:31,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 01:58:31,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-23 01:58:31,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897613849] [2024-11-23 01:58:31,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 01:58:31,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 01:58:31,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 01:58:31,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 01:58:31,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 01:58:31,075 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 82 [2024-11-23 01:58:31,076 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) [2024-11-23 01:58:31,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 01:58:31,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 82 [2024-11-23 01:58:31,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand