./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc 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-min-max-inc.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 341ac5a9697f243416924cef7ae19a5e9bc693a5982154ab196fb2faacf237d5 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 01:50:51,240 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 01:50:51,301 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 01:50:51,307 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 01:50:51,307 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 01:50:51,341 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 01:50:51,341 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 01:50:51,342 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 01:50:51,342 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 01:50:51,345 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 01:50:51,345 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 01:50:51,345 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 01:50:51,346 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 01:50:51,346 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 01:50:51,346 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 01:50:51,346 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 01:50:51,347 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 01:50:51,347 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 01:50:51,348 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 01:50:51,348 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 01:50:51,348 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 01:50:51,348 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 01:50:51,349 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 01:50:51,349 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 01:50:51,349 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 01:50:51,349 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 01:50:51,349 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 01:50:51,350 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 01:50:51,350 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 01:50:51,350 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 01:50:51,350 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 01:50:51,350 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 01:50:51,351 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:50:51,351 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 01:50:51,352 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 01:50:51,352 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 01:50:51,352 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 01:50:51,352 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 01:50:51,352 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 01:50:51,353 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 01:50:51,353 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 01:50:51,353 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 01:50:51,353 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 341ac5a9697f243416924cef7ae19a5e9bc693a5982154ab196fb2faacf237d5 [2024-11-19 01:50:51,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 01:50:51,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 01:50:51,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 01:50:51,583 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 01:50:51,583 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 01:50:51,584 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2024-11-19 01:50:52,806 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 01:50:52,949 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 01:50:52,949 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2024-11-19 01:50:52,959 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0a11339c/2af0a2f089c14c64b7b9304f2d05b96e/FLAG6aa118657 [2024-11-19 01:50:53,348 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0a11339c/2af0a2f089c14c64b7b9304f2d05b96e [2024-11-19 01:50:53,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 01:50:53,353 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 01:50:53,355 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 01:50:53,355 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 01:50:53,363 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 01:50:53,366 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:50:53" (1/1) ... [2024-11-19 01:50:53,367 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22e5e459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:53, skipping insertion in model container [2024-11-19 01:50:53,367 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:50:53" (1/1) ... [2024-11-19 01:50:53,391 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 01:50:53,549 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c[2682,2695] [2024-11-19 01:50:53,557 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:50:53,567 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 01:50:53,586 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c[2682,2695] [2024-11-19 01:50:53,589 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:50:53,604 INFO L204 MainTranslator]: Completed translation [2024-11-19 01:50:53,604 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:53 WrapperNode [2024-11-19 01:50:53,605 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 01:50:53,605 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 01:50:53,606 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 01:50:53,606 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 01:50:53,611 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:53" (1/1) ... [2024-11-19 01:50:53,616 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:53" (1/1) ... [2024-11-19 01:50:53,636 INFO L138 Inliner]: procedures = 23, calls = 25, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 118 [2024-11-19 01:50:53,639 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 01:50:53,640 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 01:50:53,640 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 01:50:53,640 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 01:50:53,649 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:53" (1/1) ... [2024-11-19 01:50:53,649 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:53" (1/1) ... [2024-11-19 01:50:53,655 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:53" (1/1) ... [2024-11-19 01:50:53,673 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 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]. [2024-11-19 01:50:53,673 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:53" (1/1) ... [2024-11-19 01:50:53,673 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:53" (1/1) ... [2024-11-19 01:50:53,678 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:53" (1/1) ... [2024-11-19 01:50:53,683 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:53" (1/1) ... [2024-11-19 01:50:53,684 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:53" (1/1) ... [2024-11-19 01:50:53,685 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:53" (1/1) ... [2024-11-19 01:50:53,690 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 01:50:53,691 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 01:50:53,691 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 01:50:53,691 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 01:50:53,691 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:53" (1/1) ... [2024-11-19 01:50:53,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:50:53,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:53,716 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) [2024-11-19 01:50:53,718 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 [2024-11-19 01:50:53,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 01:50:53,753 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 01:50:53,753 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 01:50:53,753 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 01:50:53,753 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 01:50:53,753 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-19 01:50:53,753 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-19 01:50:53,753 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-19 01:50:53,753 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-19 01:50:53,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 01:50:53,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 01:50:53,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 01:50:53,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 01:50:53,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 01:50:53,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 01:50:53,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 01:50:53,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 01:50:53,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 01:50:53,755 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 01:50:53,835 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 01:50:53,837 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 01:50:54,022 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 01:50:54,022 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 01:50:54,175 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 01:50:54,175 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-19 01:50:54,176 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:50:54 BoogieIcfgContainer [2024-11-19 01:50:54,176 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 01:50:54,177 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 01:50:54,177 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 01:50:54,183 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 01:50:54,183 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:50:53" (1/3) ... [2024-11-19 01:50:54,184 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f8d16c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:50:54, skipping insertion in model container [2024-11-19 01:50:54,184 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:53" (2/3) ... [2024-11-19 01:50:54,184 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f8d16c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:50:54, skipping insertion in model container [2024-11-19 01:50:54,184 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:50:54" (3/3) ... [2024-11-19 01:50:54,185 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc.wvr.c [2024-11-19 01:50:54,200 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 01:50:54,200 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 01:50:54,200 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 01:50:54,253 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-19 01:50:54,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 62 transitions, 152 flow [2024-11-19 01:50:54,337 INFO L124 PetriNetUnfolderBase]: 6/58 cut-off events. [2024-11-19 01:50:54,337 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-19 01:50:54,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 58 events. 6/58 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 127 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2024-11-19 01:50:54,349 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 62 transitions, 152 flow [2024-11-19 01:50:54,354 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 57 transitions, 138 flow [2024-11-19 01:50:54,360 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:50:54,384 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;@5668fd7b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:50:54,384 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-19 01:50:54,397 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:50:54,398 INFO L124 PetriNetUnfolderBase]: 6/56 cut-off events. [2024-11-19 01:50:54,398 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-19 01:50:54,398 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:54,399 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:54,399 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-19 01:50:54,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:54,404 INFO L85 PathProgramCache]: Analyzing trace with hash -2024169663, now seen corresponding path program 1 times [2024-11-19 01:50:54,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:54,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824510171] [2024-11-19 01:50:54,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:50:54,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:50:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:54,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:54,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824510171] [2024-11-19 01:50:54,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824510171] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:50:54,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:50:54,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 01:50:54,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408996473] [2024-11-19 01:50:54,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:50:54,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:50:54,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:54,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:50:54,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:50:54,829 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 62 [2024-11-19 01:50:54,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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) [2024-11-19 01:50:54,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:54,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 62 [2024-11-19 01:50:54,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:56,060 INFO L124 PetriNetUnfolderBase]: 11334/16648 cut-off events. [2024-11-19 01:50:56,061 INFO L125 PetriNetUnfolderBase]: For 884/884 co-relation queries the response was YES. [2024-11-19 01:50:56,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31544 conditions, 16648 events. 11334/16648 cut-off events. For 884/884 co-relation queries the response was YES. Maximal size of possible extension queue 860. Compared 112395 event pairs, 5075 based on Foata normal form. 309/16215 useless extension candidates. Maximal degree in co-relation 29703. Up to 8424 conditions per place. [2024-11-19 01:50:56,200 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 54 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2024-11-19 01:50:56,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 78 transitions, 303 flow [2024-11-19 01:50:56,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:50:56,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:50:56,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 158 transitions. [2024-11-19 01:50:56,209 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6370967741935484 [2024-11-19 01:50:56,210 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 138 flow. Second operand 4 states and 158 transitions. [2024-11-19 01:50:56,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 78 transitions, 303 flow [2024-11-19 01:50:56,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 78 transitions, 281 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-19 01:50:56,223 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 136 flow [2024-11-19 01:50:56,225 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-11-19 01:50:56,227 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, -4 predicate places. [2024-11-19 01:50:56,227 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 136 flow [2024-11-19 01:50:56,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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) [2024-11-19 01:50:56,228 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:56,228 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:56,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 01:50:56,228 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-19 01:50:56,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:56,229 INFO L85 PathProgramCache]: Analyzing trace with hash -273432403, now seen corresponding path program 1 times [2024-11-19 01:50:56,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:56,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408358082] [2024-11-19 01:50:56,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:50:56,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:50:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:50:56,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:56,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408358082] [2024-11-19 01:50:56,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408358082] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:50:56,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:50:56,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 01:50:56,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051351023] [2024-11-19 01:50:56,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:50:56,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:50:56,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:56,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:50:56,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:50:56,346 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 62 [2024-11-19 01:50:56,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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) [2024-11-19 01:50:56,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:56,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 62 [2024-11-19 01:50:56,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:57,712 INFO L124 PetriNetUnfolderBase]: 16337/24718 cut-off events. [2024-11-19 01:50:57,713 INFO L125 PetriNetUnfolderBase]: For 2302/2302 co-relation queries the response was YES. [2024-11-19 01:50:57,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47276 conditions, 24718 events. 16337/24718 cut-off events. For 2302/2302 co-relation queries the response was YES. Maximal size of possible extension queue 1025. Compared 176829 event pairs, 8357 based on Foata normal form. 494/23751 useless extension candidates. Maximal degree in co-relation 4458. Up to 13377 conditions per place. [2024-11-19 01:50:57,836 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 59 selfloop transitions, 3 changer transitions 0/82 dead transitions. [2024-11-19 01:50:57,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 82 transitions, 321 flow [2024-11-19 01:50:57,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:50:57,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:50:57,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 157 transitions. [2024-11-19 01:50:57,838 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6330645161290323 [2024-11-19 01:50:57,839 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 136 flow. Second operand 4 states and 157 transitions. [2024-11-19 01:50:57,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 82 transitions, 321 flow [2024-11-19 01:50:57,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 315 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 01:50:57,844 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 146 flow [2024-11-19 01:50:57,844 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-11-19 01:50:57,844 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, -2 predicate places. [2024-11-19 01:50:57,845 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 146 flow [2024-11-19 01:50:57,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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) [2024-11-19 01:50:57,845 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:57,845 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:57,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 01:50:57,845 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-19 01:50:57,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:57,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1725278555, now seen corresponding path program 1 times [2024-11-19 01:50:57,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:57,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848959819] [2024-11-19 01:50:57,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:50:57,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:50:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:50:57,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:57,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848959819] [2024-11-19 01:50:57,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848959819] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:50:57,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:50:57,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 01:50:57,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424866578] [2024-11-19 01:50:57,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:50:57,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:50:57,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:57,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:50:57,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:50:57,944 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 62 [2024-11-19 01:50:57,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 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) [2024-11-19 01:50:57,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:57,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 62 [2024-11-19 01:50:57,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:59,611 INFO L124 PetriNetUnfolderBase]: 20760/31551 cut-off events. [2024-11-19 01:50:59,611 INFO L125 PetriNetUnfolderBase]: For 4069/4803 co-relation queries the response was YES. [2024-11-19 01:50:59,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63050 conditions, 31551 events. 20760/31551 cut-off events. For 4069/4803 co-relation queries the response was YES. Maximal size of possible extension queue 986. Compared 226128 event pairs, 11156 based on Foata normal form. 1420/31182 useless extension candidates. Maximal degree in co-relation 20255. Up to 16911 conditions per place. [2024-11-19 01:50:59,749 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 60 selfloop transitions, 3 changer transitions 0/83 dead transitions. [2024-11-19 01:50:59,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 338 flow [2024-11-19 01:50:59,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:50:59,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:50:59,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 156 transitions. [2024-11-19 01:50:59,751 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6290322580645161 [2024-11-19 01:50:59,751 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 146 flow. Second operand 4 states and 156 transitions. [2024-11-19 01:50:59,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 338 flow [2024-11-19 01:50:59,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 83 transitions, 333 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 01:50:59,754 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 156 flow [2024-11-19 01:50:59,754 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-11-19 01:50:59,755 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 0 predicate places. [2024-11-19 01:50:59,755 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 156 flow [2024-11-19 01:50:59,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 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) [2024-11-19 01:50:59,755 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:59,756 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:59,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 01:50:59,756 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-19 01:50:59,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:59,756 INFO L85 PathProgramCache]: Analyzing trace with hash -165344647, now seen corresponding path program 1 times [2024-11-19 01:50:59,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:59,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153423960] [2024-11-19 01:50:59,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:50:59,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:50:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:50:59,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:59,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153423960] [2024-11-19 01:50:59,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153423960] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:50:59,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:50:59,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:50:59,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116133218] [2024-11-19 01:50:59,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:50:59,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 01:50:59,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:59,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 01:50:59,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 01:50:59,845 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 62 [2024-11-19 01:50:59,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2024-11-19 01:50:59,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:59,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 62 [2024-11-19 01:50:59,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:51:01,265 INFO L124 PetriNetUnfolderBase]: 18370/27689 cut-off events. [2024-11-19 01:51:01,265 INFO L125 PetriNetUnfolderBase]: For 5103/6413 co-relation queries the response was YES. [2024-11-19 01:51:01,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57796 conditions, 27689 events. 18370/27689 cut-off events. For 5103/6413 co-relation queries the response was YES. Maximal size of possible extension queue 950. Compared 195767 event pairs, 15082 based on Foata normal form. 1310/27483 useless extension candidates. Maximal degree in co-relation 19096. Up to 22509 conditions per place. [2024-11-19 01:51:01,421 INFO L140 encePairwiseOnDemand]: 59/62 looper letters, 37 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2024-11-19 01:51:01,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 61 transitions, 236 flow [2024-11-19 01:51:01,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 01:51:01,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 01:51:01,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2024-11-19 01:51:01,424 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6182795698924731 [2024-11-19 01:51:01,424 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 156 flow. Second operand 3 states and 115 transitions. [2024-11-19 01:51:01,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 61 transitions, 236 flow [2024-11-19 01:51:01,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 01:51:01,429 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 164 flow [2024-11-19 01:51:01,429 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-11-19 01:51:01,429 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 1 predicate places. [2024-11-19 01:51:01,430 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 164 flow [2024-11-19 01:51:01,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2024-11-19 01:51:01,431 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:51:01,431 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:51:01,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 01:51:01,431 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-19 01:51:01,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:51:01,432 INFO L85 PathProgramCache]: Analyzing trace with hash -779375995, now seen corresponding path program 1 times [2024-11-19 01:51:01,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:51:01,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972448053] [2024-11-19 01:51:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:51:01,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:51:01,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:51:01,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:01,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:51:01,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972448053] [2024-11-19 01:51:01,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972448053] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:51:01,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519040379] [2024-11-19 01:51:01,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:51:01,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:01,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:51:01,769 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) [2024-11-19 01:51:01,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 01:51:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:51:01,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 01:51:01,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:51:02,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-19 01:51:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:02,205 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 01:51:02,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519040379] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:51:02,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 01:51:02,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2024-11-19 01:51:02,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904132799] [2024-11-19 01:51:02,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:51:02,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 01:51:02,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:51:02,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 01:51:02,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2024-11-19 01:51:02,332 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2024-11-19 01:51:02,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 164 flow. Second operand has 11 states, 11 states have (on average 20.818181818181817) internal successors, (229), 11 states have internal predecessors, (229), 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) [2024-11-19 01:51:02,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:51:02,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2024-11-19 01:51:02,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:51:09,045 INFO L124 PetriNetUnfolderBase]: 82748/118504 cut-off events. [2024-11-19 01:51:09,046 INFO L125 PetriNetUnfolderBase]: For 21228/21228 co-relation queries the response was YES. [2024-11-19 01:51:09,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256494 conditions, 118504 events. 82748/118504 cut-off events. For 21228/21228 co-relation queries the response was YES. Maximal size of possible extension queue 2903. Compared 874006 event pairs, 23255 based on Foata normal form. 130/116920 useless extension candidates. Maximal degree in co-relation 256477. Up to 48930 conditions per place. [2024-11-19 01:51:09,645 INFO L140 encePairwiseOnDemand]: 44/62 looper letters, 286 selfloop transitions, 40 changer transitions 0/339 dead transitions. [2024-11-19 01:51:09,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 339 transitions, 1561 flow [2024-11-19 01:51:09,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-19 01:51:09,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-19 01:51:09,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 561 transitions. [2024-11-19 01:51:09,650 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.603225806451613 [2024-11-19 01:51:09,650 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 164 flow. Second operand 15 states and 561 transitions. [2024-11-19 01:51:09,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 339 transitions, 1561 flow [2024-11-19 01:51:10,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 339 transitions, 1557 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-19 01:51:10,052 INFO L231 Difference]: Finished difference. Result has 91 places, 103 transitions, 446 flow [2024-11-19 01:51:10,053 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=446, PETRI_PLACES=91, PETRI_TRANSITIONS=103} [2024-11-19 01:51:10,053 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 27 predicate places. [2024-11-19 01:51:10,053 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 103 transitions, 446 flow [2024-11-19 01:51:10,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.818181818181817) internal successors, (229), 11 states have internal predecessors, (229), 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) [2024-11-19 01:51:10,056 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:51:10,056 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:51:10,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 01:51:10,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:10,258 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-19 01:51:10,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:51:10,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1080282361, now seen corresponding path program 2 times [2024-11-19 01:51:10,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:51:10,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860178906] [2024-11-19 01:51:10,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:51:10,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:51:10,301 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:51:10,303 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:10,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:51:10,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:51:10,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860178906] [2024-11-19 01:51:10,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860178906] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:51:10,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179338205] [2024-11-19 01:51:10,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:51:10,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:10,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:51:10,545 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) [2024-11-19 01:51:10,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 01:51:10,630 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:51:10,631 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:10,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-19 01:51:10,635 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:51:10,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 01:51:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:51:10,749 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 01:51:10,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179338205] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:51:10,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 01:51:10,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4] total 12 [2024-11-19 01:51:10,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655344430] [2024-11-19 01:51:10,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:51:10,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 01:51:10,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:51:10,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 01:51:10,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-11-19 01:51:10,774 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 62 [2024-11-19 01:51:10,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 103 transitions, 446 flow. Second operand has 9 states, 9 states have (on average 24.333333333333332) internal successors, (219), 9 states have internal predecessors, (219), 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) [2024-11-19 01:51:10,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:51:10,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 62 [2024-11-19 01:51:10,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:51:16,493 INFO L124 PetriNetUnfolderBase]: 58207/81572 cut-off events. [2024-11-19 01:51:16,493 INFO L125 PetriNetUnfolderBase]: For 81082/83520 co-relation queries the response was YES. [2024-11-19 01:51:16,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232323 conditions, 81572 events. 58207/81572 cut-off events. For 81082/83520 co-relation queries the response was YES. Maximal size of possible extension queue 2319. Compared 564735 event pairs, 19407 based on Foata normal form. 3870/84334 useless extension candidates. Maximal degree in co-relation 232289. Up to 33690 conditions per place. [2024-11-19 01:51:16,985 INFO L140 encePairwiseOnDemand]: 48/62 looper letters, 216 selfloop transitions, 33 changer transitions 0/270 dead transitions. [2024-11-19 01:51:16,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 270 transitions, 1524 flow [2024-11-19 01:51:16,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 01:51:16,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 01:51:16,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 448 transitions. [2024-11-19 01:51:16,986 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6021505376344086 [2024-11-19 01:51:16,987 INFO L175 Difference]: Start difference. First operand has 91 places, 103 transitions, 446 flow. Second operand 12 states and 448 transitions. [2024-11-19 01:51:16,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 270 transitions, 1524 flow [2024-11-19 01:51:17,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 270 transitions, 1520 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-11-19 01:51:17,568 INFO L231 Difference]: Finished difference. Result has 106 places, 105 transitions, 562 flow [2024-11-19 01:51:17,568 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=562, PETRI_PLACES=106, PETRI_TRANSITIONS=105} [2024-11-19 01:51:17,568 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 42 predicate places. [2024-11-19 01:51:17,569 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 105 transitions, 562 flow [2024-11-19 01:51:17,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 24.333333333333332) internal successors, (219), 9 states have internal predecessors, (219), 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) [2024-11-19 01:51:17,569 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:51:17,569 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:51:17,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 01:51:17,769 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,SelfDestructingSolverStorable5 [2024-11-19 01:51:17,770 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-19 01:51:17,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:51:17,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1138520285, now seen corresponding path program 3 times [2024-11-19 01:51:17,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:51:17,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807867550] [2024-11-19 01:51:17,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:51:17,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:51:17,793 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:51:17,794 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:51:17,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:51:17,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807867550] [2024-11-19 01:51:17,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807867550] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:51:17,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:51:17,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 01:51:17,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659861422] [2024-11-19 01:51:17,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:51:17,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 01:51:17,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:51:17,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 01:51:17,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-19 01:51:17,927 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 62 [2024-11-19 01:51:17,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 105 transitions, 562 flow. Second operand has 9 states, 9 states have (on average 25.333333333333332) internal successors, (228), 9 states have internal predecessors, (228), 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) [2024-11-19 01:51:17,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:51:17,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 62 [2024-11-19 01:51:17,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:51:29,523 INFO L124 PetriNetUnfolderBase]: 98506/143429 cut-off events. [2024-11-19 01:51:29,524 INFO L125 PetriNetUnfolderBase]: For 223604/236158 co-relation queries the response was YES. [2024-11-19 01:51:30,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433740 conditions, 143429 events. 98506/143429 cut-off events. For 223604/236158 co-relation queries the response was YES. Maximal size of possible extension queue 4036. Compared 1123838 event pairs, 29250 based on Foata normal form. 7544/149650 useless extension candidates. Maximal degree in co-relation 433697. Up to 56188 conditions per place. [2024-11-19 01:51:30,664 INFO L140 encePairwiseOnDemand]: 49/62 looper letters, 282 selfloop transitions, 73 changer transitions 0/379 dead transitions. [2024-11-19 01:51:30,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 379 transitions, 2709 flow [2024-11-19 01:51:30,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 01:51:30,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 01:51:30,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 463 transitions. [2024-11-19 01:51:30,666 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6223118279569892 [2024-11-19 01:51:30,666 INFO L175 Difference]: Start difference. First operand has 106 places, 105 transitions, 562 flow. Second operand 12 states and 463 transitions. [2024-11-19 01:51:30,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 379 transitions, 2709 flow [2024-11-19 01:51:34,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 379 transitions, 2612 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-11-19 01:51:34,053 INFO L231 Difference]: Finished difference. Result has 120 places, 171 transitions, 1331 flow [2024-11-19 01:51:34,053 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1331, PETRI_PLACES=120, PETRI_TRANSITIONS=171} [2024-11-19 01:51:34,053 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 56 predicate places. [2024-11-19 01:51:34,054 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 171 transitions, 1331 flow [2024-11-19 01:51:34,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 25.333333333333332) internal successors, (228), 9 states have internal predecessors, (228), 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) [2024-11-19 01:51:34,054 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:51:34,054 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:51:34,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-19 01:51:34,054 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-19 01:51:34,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:51:34,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1815880183, now seen corresponding path program 4 times [2024-11-19 01:51:34,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:51:34,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524839246] [2024-11-19 01:51:34,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:51:34,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:51:34,065 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:51:34,065 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:34,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:34,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:51:34,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524839246] [2024-11-19 01:51:34,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524839246] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:51:34,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567606523] [2024-11-19 01:51:34,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:51:34,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:34,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:51:34,303 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:51:34,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 01:51:34,376 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:51:34,377 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:34,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 01:51:34,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:51:34,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 7 [2024-11-19 01:51:34,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 01:51:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:34,702 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:51:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:51:39,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567606523] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:51:39,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:51:39,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2024-11-19 01:51:39,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881734134] [2024-11-19 01:51:39,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:51:39,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-19 01:51:39,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:51:39,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-19 01:51:39,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1318, Unknown=1, NotChecked=0, Total=1482 [2024-11-19 01:51:43,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 01:51:47,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 01:51:52,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 01:51:56,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 01:51:56,365 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 62 [2024-11-19 01:51:56,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 171 transitions, 1331 flow. Second operand has 39 states, 39 states have (on average 12.923076923076923) internal successors, (504), 39 states have internal predecessors, (504), 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) [2024-11-19 01:51:56,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:51:56,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 62 [2024-11-19 01:51:56,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand