./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 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 /storage/repos/ultimate/releaseScripts/default/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 55079ed406966de8cb8f01bd4828043af39842b101d9722a0d33cee3b1fc3a52 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 12:33:20,390 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 12:33:20,462 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 12:33:20,468 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 12:33:20,470 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 12:33:20,496 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 12:33:20,497 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 12:33:20,497 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 12:33:20,497 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 12:33:20,498 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 12:33:20,498 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 12:33:20,498 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 12:33:20,499 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 12:33:20,499 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 12:33:20,500 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 12:33:20,500 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 12:33:20,500 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 12:33:20,501 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 12:33:20,501 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 12:33:20,503 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 12:33:20,503 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 12:33:20,503 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 12:33:20,504 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 12:33:20,504 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 12:33:20,505 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 12:33:20,505 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 12:33:20,505 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 12:33:20,506 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 12:33:20,506 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 12:33:20,506 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 12:33:20,507 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 12:33:20,507 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 12:33:20,507 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:33:20,508 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 12:33:20,508 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 12:33:20,508 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 12:33:20,509 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 12:33:20,509 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 12:33:20,509 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 12:33:20,509 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 12:33:20,510 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 12:33:20,510 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 12:33:20,511 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 55079ed406966de8cb8f01bd4828043af39842b101d9722a0d33cee3b1fc3a52 [2024-10-24 12:33:20,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 12:33:20,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 12:33:20,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 12:33:20,778 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 12:33:20,779 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 12:33:20,780 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2024-10-24 12:33:22,310 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 12:33:22,510 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 12:33:22,511 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2024-10-24 12:33:22,520 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bb16583c/88604b5073a340ee993c49dab0f3cf5a/FLAG3ff1747ec [2024-10-24 12:33:22,890 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bb16583c/88604b5073a340ee993c49dab0f3cf5a [2024-10-24 12:33:22,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 12:33:22,894 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 12:33:22,895 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 12:33:22,895 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 12:33:22,899 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 12:33:22,900 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:33:22" (1/1) ... [2024-10-24 12:33:22,901 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@89c2960 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:22, skipping insertion in model container [2024-10-24 12:33:22,901 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:33:22" (1/1) ... [2024-10-24 12:33:22,923 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 12:33:23,156 WARN L248 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[3070,3083] [2024-10-24 12:33:23,170 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:33:23,184 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 12:33:23,217 WARN L248 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[3070,3083] [2024-10-24 12:33:23,225 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:33:23,243 INFO L204 MainTranslator]: Completed translation [2024-10-24 12:33:23,244 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:23 WrapperNode [2024-10-24 12:33:23,244 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 12:33:23,245 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 12:33:23,246 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 12:33:23,247 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 12:33:23,254 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:23" (1/1) ... [2024-10-24 12:33:23,263 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:23" (1/1) ... [2024-10-24 12:33:23,306 INFO L138 Inliner]: procedures = 25, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 117 [2024-10-24 12:33:23,307 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 12:33:23,307 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 12:33:23,307 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 12:33:23,307 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 12:33:23,336 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:23" (1/1) ... [2024-10-24 12:33:23,336 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:23" (1/1) ... [2024-10-24 12:33:23,343 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:23" (1/1) ... [2024-10-24 12:33:23,361 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 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]. [2024-10-24 12:33:23,365 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:23" (1/1) ... [2024-10-24 12:33:23,366 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:23" (1/1) ... [2024-10-24 12:33:23,374 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:23" (1/1) ... [2024-10-24 12:33:23,379 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:23" (1/1) ... [2024-10-24 12:33:23,383 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:23" (1/1) ... [2024-10-24 12:33:23,384 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:23" (1/1) ... [2024-10-24 12:33:23,387 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 12:33:23,388 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 12:33:23,388 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 12:33:23,388 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 12:33:23,389 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:23" (1/1) ... [2024-10-24 12:33:23,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:33:23,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:33:23,424 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) [2024-10-24 12:33:23,431 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 [2024-10-24 12:33:23,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 12:33:23,478 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 12:33:23,479 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 12:33:23,480 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 12:33:23,480 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 12:33:23,480 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-24 12:33:23,480 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-24 12:33:23,480 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-10-24 12:33:23,480 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-10-24 12:33:23,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 12:33:23,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 12:33:23,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 12:33:23,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 12:33:23,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-24 12:33:23,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-24 12:33:23,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 12:33:23,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 12:33:23,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 12:33:23,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 12:33:23,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 12:33:23,488 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 12:33:23,634 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 12:33:23,637 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 12:33:23,977 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 12:33:23,978 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 12:33:24,198 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 12:33:24,198 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-24 12:33:24,199 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:33:24 BoogieIcfgContainer [2024-10-24 12:33:24,199 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 12:33:24,202 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 12:33:24,202 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 12:33:24,205 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 12:33:24,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:33:22" (1/3) ... [2024-10-24 12:33:24,207 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@106c1f21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:33:24, skipping insertion in model container [2024-10-24 12:33:24,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:23" (2/3) ... [2024-10-24 12:33:24,207 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@106c1f21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:33:24, skipping insertion in model container [2024-10-24 12:33:24,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:33:24" (3/3) ... [2024-10-24 12:33:24,209 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc.wvr.c [2024-10-24 12:33:24,230 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 12:33:24,231 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 12:33:24,231 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 12:33:24,304 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-24 12:33:24,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 120 flow [2024-10-24 12:33:24,381 INFO L124 PetriNetUnfolderBase]: 4/42 cut-off events. [2024-10-24 12:33:24,382 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-24 12:33:24,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 42 events. 4/42 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 89 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2024-10-24 12:33:24,386 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 120 flow [2024-10-24 12:33:24,389 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 41 transitions, 106 flow [2024-10-24 12:33:24,398 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:33:24,404 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;@374ce163, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:33:24,405 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-24 12:33:24,422 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:33:24,422 INFO L124 PetriNetUnfolderBase]: 4/40 cut-off events. [2024-10-24 12:33:24,422 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-24 12:33:24,423 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:24,424 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] [2024-10-24 12:33:24,427 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)] === [2024-10-24 12:33:24,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:24,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1137501502, now seen corresponding path program 1 times [2024-10-24 12:33:24,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:24,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630619918] [2024-10-24 12:33:24,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:24,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:24,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:24,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:24,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630619918] [2024-10-24 12:33:24,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630619918] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:33:24,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:33:24,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 12:33:24,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208816120] [2024-10-24 12:33:24,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:33:24,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 12:33:24,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:24,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 12:33:24,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-24 12:33:24,979 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-10-24 12:33:24,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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) [2024-10-24 12:33:24,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:24,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-10-24 12:33:24,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:25,765 INFO L124 PetriNetUnfolderBase]: 3361/4866 cut-off events. [2024-10-24 12:33:25,767 INFO L125 PetriNetUnfolderBase]: For 267/267 co-relation queries the response was YES. [2024-10-24 12:33:25,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9703 conditions, 4866 events. 3361/4866 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 28316 event pairs, 1583 based on Foata normal form. 162/4816 useless extension candidates. Maximal degree in co-relation 9085. Up to 2990 conditions per place. [2024-10-24 12:33:25,815 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 42 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2024-10-24 12:33:25,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 237 flow [2024-10-24 12:33:25,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 12:33:25,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 12:33:25,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-10-24 12:33:25,827 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-10-24 12:33:25,829 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 106 flow. Second operand 4 states and 110 transitions. [2024-10-24 12:33:25,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 237 flow [2024-10-24 12:33:25,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 215 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-24 12:33:25,844 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 104 flow [2024-10-24 12:33:25,846 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2024-10-24 12:33:25,852 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2024-10-24 12:33:25,852 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 104 flow [2024-10-24 12:33:25,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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) [2024-10-24 12:33:25,853 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:25,853 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] [2024-10-24 12:33:25,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 12:33:25,854 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)] === [2024-10-24 12:33:25,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:25,855 INFO L85 PathProgramCache]: Analyzing trace with hash -66851015, now seen corresponding path program 1 times [2024-10-24 12:33:25,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:25,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995432875] [2024-10-24 12:33:25,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:25,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:33:26,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:26,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995432875] [2024-10-24 12:33:26,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995432875] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:33:26,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:33:26,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 12:33:26,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285141740] [2024-10-24 12:33:26,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:33:26,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 12:33:26,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:26,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 12:33:26,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-24 12:33:26,044 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-10-24 12:33:26,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2024-10-24 12:33:26,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:26,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-10-24 12:33:26,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:26,646 INFO L124 PetriNetUnfolderBase]: 4370/6365 cut-off events. [2024-10-24 12:33:26,647 INFO L125 PetriNetUnfolderBase]: For 1112/1112 co-relation queries the response was YES. [2024-10-24 12:33:26,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13521 conditions, 6365 events. 4370/6365 cut-off events. For 1112/1112 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 37204 event pairs, 2417 based on Foata normal form. 192/6379 useless extension candidates. Maximal degree in co-relation 2091. Up to 4205 conditions per place. [2024-10-24 12:33:26,686 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 47 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2024-10-24 12:33:26,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 61 transitions, 255 flow [2024-10-24 12:33:26,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 12:33:26,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 12:33:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-10-24 12:33:26,690 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.592391304347826 [2024-10-24 12:33:26,691 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 104 flow. Second operand 4 states and 109 transitions. [2024-10-24 12:33:26,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 61 transitions, 255 flow [2024-10-24 12:33:26,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 61 transitions, 249 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 12:33:26,698 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 114 flow [2024-10-24 12:33:26,698 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-10-24 12:33:26,699 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2024-10-24 12:33:26,699 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 114 flow [2024-10-24 12:33:26,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2024-10-24 12:33:26,700 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:26,700 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] [2024-10-24 12:33:26,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 12:33:26,700 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)] === [2024-10-24 12:33:26,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:26,701 INFO L85 PathProgramCache]: Analyzing trace with hash 319106967, now seen corresponding path program 1 times [2024-10-24 12:33:26,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:26,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351295691] [2024-10-24 12:33:26,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:26,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:33:26,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:26,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351295691] [2024-10-24 12:33:26,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351295691] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:33:26,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:33:26,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 12:33:26,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688904436] [2024-10-24 12:33:26,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:33:26,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 12:33:26,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:26,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 12:33:26,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-24 12:33:26,820 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-10-24 12:33:26,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2024-10-24 12:33:26,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:26,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-10-24 12:33:26,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:27,587 INFO L124 PetriNetUnfolderBase]: 4947/7209 cut-off events. [2024-10-24 12:33:27,589 INFO L125 PetriNetUnfolderBase]: For 1480/1745 co-relation queries the response was YES. [2024-10-24 12:33:27,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16318 conditions, 7209 events. 4947/7209 cut-off events. For 1480/1745 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 42544 event pairs, 2918 based on Foata normal form. 505/7589 useless extension candidates. Maximal degree in co-relation 4322. Up to 4773 conditions per place. [2024-10-24 12:33:27,635 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 48 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2024-10-24 12:33:27,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 62 transitions, 272 flow [2024-10-24 12:33:27,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 12:33:27,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 12:33:27,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2024-10-24 12:33:27,639 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-10-24 12:33:27,640 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 114 flow. Second operand 4 states and 108 transitions. [2024-10-24 12:33:27,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 62 transitions, 272 flow [2024-10-24 12:33:27,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 267 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 12:33:27,645 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 124 flow [2024-10-24 12:33:27,646 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-10-24 12:33:27,647 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-10-24 12:33:27,647 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 124 flow [2024-10-24 12:33:27,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2024-10-24 12:33:27,648 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:27,648 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] [2024-10-24 12:33:27,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 12:33:27,648 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)] === [2024-10-24 12:33:27,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:27,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1683890689, now seen corresponding path program 1 times [2024-10-24 12:33:27,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:27,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738473635] [2024-10-24 12:33:27,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:27,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:33:27,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:27,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738473635] [2024-10-24 12:33:27,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738473635] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:33:27,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:33:27,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:33:27,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671449439] [2024-10-24 12:33:27,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:33:27,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:33:27,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:27,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:33:27,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:33:27,778 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-10-24 12:33:27,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2024-10-24 12:33:27,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:27,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-10-24 12:33:27,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:28,331 INFO L124 PetriNetUnfolderBase]: 4245/6149 cut-off events. [2024-10-24 12:33:28,332 INFO L125 PetriNetUnfolderBase]: For 1656/2112 co-relation queries the response was YES. [2024-10-24 12:33:28,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14705 conditions, 6149 events. 4245/6149 cut-off events. For 1656/2112 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 35908 event pairs, 3544 based on Foata normal form. 456/6493 useless extension candidates. Maximal degree in co-relation 4137. Up to 5716 conditions per place. [2024-10-24 12:33:28,380 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 31 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2024-10-24 12:33:28,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 45 transitions, 192 flow [2024-10-24 12:33:28,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 12:33:28,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 12:33:28,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-10-24 12:33:28,382 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.572463768115942 [2024-10-24 12:33:28,382 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 124 flow. Second operand 3 states and 79 transitions. [2024-10-24 12:33:28,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 45 transitions, 192 flow [2024-10-24 12:33:28,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 45 transitions, 188 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 12:33:28,387 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 132 flow [2024-10-24 12:33:28,388 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-10-24 12:33:28,389 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2024-10-24 12:33:28,390 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 132 flow [2024-10-24 12:33:28,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2024-10-24 12:33:28,390 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:28,390 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] [2024-10-24 12:33:28,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 12:33:28,391 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)] === [2024-10-24 12:33:28,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:28,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1659799412, now seen corresponding path program 1 times [2024-10-24 12:33:28,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:28,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887380851] [2024-10-24 12:33:28,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:28,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:33:29,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:29,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887380851] [2024-10-24 12:33:29,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887380851] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:33:29,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788385221] [2024-10-24 12:33:29,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:29,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:33:29,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:33:29,054 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) [2024-10-24 12:33:29,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 12:33:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:29,173 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-24 12:33:29,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:33:29,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 12:33:29,563 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 [2024-10-24 12:33:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:33:29,634 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:33:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:33:30,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788385221] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:33:30,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:33:30,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 8] total 22 [2024-10-24 12:33:30,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105699221] [2024-10-24 12:33:30,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:33:30,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-24 12:33:30,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:30,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-24 12:33:30,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2024-10-24 12:33:30,197 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-10-24 12:33:30,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 132 flow. Second operand has 22 states, 22 states have (on average 17.181818181818183) internal successors, (378), 22 states have internal predecessors, (378), 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) [2024-10-24 12:33:30,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:30,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-10-24 12:33:30,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:37,000 INFO L124 PetriNetUnfolderBase]: 51642/74108 cut-off events. [2024-10-24 12:33:37,001 INFO L125 PetriNetUnfolderBase]: For 24171/24171 co-relation queries the response was YES. [2024-10-24 12:33:37,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175792 conditions, 74108 events. 51642/74108 cut-off events. For 24171/24171 co-relation queries the response was YES. Maximal size of possible extension queue 2936. Compared 535027 event pairs, 631 based on Foata normal form. 8/74110 useless extension candidates. Maximal degree in co-relation 175778. Up to 9394 conditions per place. [2024-10-24 12:33:37,323 INFO L140 encePairwiseOnDemand]: 32/46 looper letters, 293 selfloop transitions, 53 changer transitions 341/696 dead transitions. [2024-10-24 12:33:37,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 696 transitions, 3504 flow [2024-10-24 12:33:37,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-10-24 12:33:37,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-10-24 12:33:37,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 1179 transitions. [2024-10-24 12:33:37,328 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.610248447204969 [2024-10-24 12:33:37,328 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 132 flow. Second operand 42 states and 1179 transitions. [2024-10-24 12:33:37,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 696 transitions, 3504 flow [2024-10-24 12:33:37,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 696 transitions, 3500 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 12:33:37,747 INFO L231 Difference]: Finished difference. Result has 121 places, 109 transitions, 649 flow [2024-10-24 12:33:37,747 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=649, PETRI_PLACES=121, PETRI_TRANSITIONS=109} [2024-10-24 12:33:37,748 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 71 predicate places. [2024-10-24 12:33:37,748 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 109 transitions, 649 flow [2024-10-24 12:33:37,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 17.181818181818183) internal successors, (378), 22 states have internal predecessors, (378), 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) [2024-10-24 12:33:37,749 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:37,749 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] [2024-10-24 12:33:37,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-24 12:33:37,954 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 [2024-10-24 12:33:37,955 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)] === [2024-10-24 12:33:37,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:37,956 INFO L85 PathProgramCache]: Analyzing trace with hash 34653344, now seen corresponding path program 2 times [2024-10-24 12:33:37,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:37,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180374345] [2024-10-24 12:33:37,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:37,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 12:33:38,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:38,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180374345] [2024-10-24 12:33:38,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180374345] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:33:38,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:33:38,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 12:33:38,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924498509] [2024-10-24 12:33:38,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:33:38,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 12:33:38,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:38,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 12:33:38,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 12:33:38,362 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-10-24 12:33:38,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 109 transitions, 649 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2024-10-24 12:33:38,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:38,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-10-24 12:33:38,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:33:45,195 INFO L124 PetriNetUnfolderBase]: 41516/60978 cut-off events. [2024-10-24 12:33:45,196 INFO L125 PetriNetUnfolderBase]: For 726757/728587 co-relation queries the response was YES. [2024-10-24 12:33:45,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272039 conditions, 60978 events. 41516/60978 cut-off events. For 726757/728587 co-relation queries the response was YES. Maximal size of possible extension queue 2430. Compared 453040 event pairs, 8131 based on Foata normal form. 1032/61748 useless extension candidates. Maximal degree in co-relation 271988. Up to 30012 conditions per place. [2024-10-24 12:33:45,670 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 95 selfloop transitions, 4 changer transitions 116/233 dead transitions. [2024-10-24 12:33:45,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 233 transitions, 1803 flow [2024-10-24 12:33:45,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:33:45,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 12:33:45,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-10-24 12:33:45,672 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6391304347826087 [2024-10-24 12:33:45,672 INFO L175 Difference]: Start difference. First operand has 121 places, 109 transitions, 649 flow. Second operand 5 states and 147 transitions. [2024-10-24 12:33:45,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 233 transitions, 1803 flow [2024-10-24 12:33:50,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 233 transitions, 1708 flow, removed 46 selfloop flow, removed 15 redundant places. [2024-10-24 12:33:50,203 INFO L231 Difference]: Finished difference. Result has 93 places, 76 transitions, 424 flow [2024-10-24 12:33:50,203 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=424, PETRI_PLACES=93, PETRI_TRANSITIONS=76} [2024-10-24 12:33:50,204 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 43 predicate places. [2024-10-24 12:33:50,204 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 76 transitions, 424 flow [2024-10-24 12:33:50,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2024-10-24 12:33:50,205 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:33:50,205 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] [2024-10-24 12:33:50,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-24 12:33:50,205 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)] === [2024-10-24 12:33:50,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:33:50,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1941883002, now seen corresponding path program 3 times [2024-10-24 12:33:50,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:33:50,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127362421] [2024-10-24 12:33:50,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:33:50,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:33:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:33:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 12:33:50,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:33:50,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127362421] [2024-10-24 12:33:50,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127362421] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:33:50,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622515585] [2024-10-24 12:33:50,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:33:50,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:33:50,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:33:50,451 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) [2024-10-24 12:33:50,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 12:33:50,552 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-24 12:33:50,552 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:33:50,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-24 12:33:50,558 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:33:50,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 12:33:50,686 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 [2024-10-24 12:33:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 12:33:50,721 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:33:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 12:33:50,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622515585] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-24 12:33:50,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-24 12:33:50,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 9] total 19 [2024-10-24 12:33:50,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550340035] [2024-10-24 12:33:50,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:33:50,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 12:33:50,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:33:50,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 12:33:50,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2024-10-24 12:33:51,018 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-10-24 12:33:51,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 76 transitions, 424 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 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) [2024-10-24 12:33:51,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:33:51,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-10-24 12:33:51,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:34:00,223 INFO L124 PetriNetUnfolderBase]: 65756/94899 cut-off events. [2024-10-24 12:34:00,224 INFO L125 PetriNetUnfolderBase]: For 595522/596002 co-relation queries the response was YES. [2024-10-24 12:34:00,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374644 conditions, 94899 events. 65756/94899 cut-off events. For 595522/596002 co-relation queries the response was YES. Maximal size of possible extension queue 3794. Compared 721297 event pairs, 9295 based on Foata normal form. 400/94898 useless extension candidates. Maximal degree in co-relation 374604. Up to 24852 conditions per place. [2024-10-24 12:34:00,769 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 133 selfloop transitions, 13 changer transitions 75/234 dead transitions. [2024-10-24 12:34:00,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 234 transitions, 1841 flow [2024-10-24 12:34:00,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 12:34:00,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-24 12:34:00,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-10-24 12:34:00,771 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6894409937888198 [2024-10-24 12:34:00,771 INFO L175 Difference]: Start difference. First operand has 93 places, 76 transitions, 424 flow. Second operand 7 states and 222 transitions. [2024-10-24 12:34:00,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 234 transitions, 1841 flow [2024-10-24 12:34:03,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 234 transitions, 1641 flow, removed 99 selfloop flow, removed 8 redundant places. [2024-10-24 12:34:03,095 INFO L231 Difference]: Finished difference. Result has 88 places, 85 transitions, 512 flow [2024-10-24 12:34:03,095 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=512, PETRI_PLACES=88, PETRI_TRANSITIONS=85} [2024-10-24 12:34:03,095 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 38 predicate places. [2024-10-24 12:34:03,095 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 85 transitions, 512 flow [2024-10-24 12:34:03,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 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) [2024-10-24 12:34:03,096 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:34:03,096 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] [2024-10-24 12:34:03,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-24 12:34:03,296 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,SelfDestructingSolverStorable6 [2024-10-24 12:34:03,297 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)] === [2024-10-24 12:34:03,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:34:03,297 INFO L85 PathProgramCache]: Analyzing trace with hash -250877316, now seen corresponding path program 4 times [2024-10-24 12:34:03,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:34:03,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781673230] [2024-10-24 12:34:03,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:34:03,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:34:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:34:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:34:03,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:34:03,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781673230] [2024-10-24 12:34:03,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781673230] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:34:03,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689085016] [2024-10-24 12:34:03,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 12:34:03,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:34:03,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:34:03,475 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) [2024-10-24 12:34:03,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 12:34:03,577 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 12:34:03,577 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:34:03,579 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 12:34:03,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:34:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:34:03,644 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:34:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:34:03,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689085016] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:34:03,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:34:03,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-24 12:34:03,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666234225] [2024-10-24 12:34:03,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:34:03,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 12:34:03,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:34:03,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 12:34:03,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-24 12:34:03,784 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-10-24 12:34:03,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 85 transitions, 512 flow. Second operand has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 7 states have internal predecessors, (173), 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) [2024-10-24 12:34:03,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:34:03,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-10-24 12:34:03,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:34:08,489 INFO L124 PetriNetUnfolderBase]: 40048/58277 cut-off events. [2024-10-24 12:34:08,489 INFO L125 PetriNetUnfolderBase]: For 173774/174822 co-relation queries the response was YES. [2024-10-24 12:34:08,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204448 conditions, 58277 events. 40048/58277 cut-off events. For 173774/174822 co-relation queries the response was YES. Maximal size of possible extension queue 2278. Compared 419034 event pairs, 7574 based on Foata normal form. 632/58605 useless extension candidates. Maximal degree in co-relation 204409. Up to 26229 conditions per place. [2024-10-24 12:34:08,839 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 88 selfloop transitions, 4 changer transitions 73/183 dead transitions. [2024-10-24 12:34:08,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 183 transitions, 1489 flow [2024-10-24 12:34:08,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:34:08,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 12:34:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 142 transitions. [2024-10-24 12:34:08,840 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6173913043478261 [2024-10-24 12:34:08,840 INFO L175 Difference]: Start difference. First operand has 88 places, 85 transitions, 512 flow. Second operand 5 states and 142 transitions. [2024-10-24 12:34:08,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 183 transitions, 1489 flow [2024-10-24 12:34:09,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 183 transitions, 1390 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-10-24 12:34:09,985 INFO L231 Difference]: Finished difference. Result has 83 places, 77 transitions, 426 flow [2024-10-24 12:34:09,986 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=426, PETRI_PLACES=83, PETRI_TRANSITIONS=77} [2024-10-24 12:34:09,986 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 33 predicate places. [2024-10-24 12:34:09,987 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 77 transitions, 426 flow [2024-10-24 12:34:09,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 7 states have internal predecessors, (173), 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) [2024-10-24 12:34:09,987 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:34:09,987 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] [2024-10-24 12:34:10,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 12:34:10,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:34:10,189 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-24 12:34:10,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:34:10,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1276031898, now seen corresponding path program 5 times [2024-10-24 12:34:10,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:34:10,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578576511] [2024-10-24 12:34:10,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:34:10,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:34:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:34:10,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 12:34:10,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:34:10,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578576511] [2024-10-24 12:34:10,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578576511] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:34:10,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554066895] [2024-10-24 12:34:10,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 12:34:10,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:34:10,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:34:10,741 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:34:10,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 12:34:10,847 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-24 12:34:10,847 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:34:10,849 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 12:34:10,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:34:10,922 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 36 treesize of output 13 [2024-10-24 12:34:11,003 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 17 treesize of output 9 [2024-10-24 12:34:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:34:11,028 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:34:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:34:11,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554066895] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:34:11,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:34:11,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 23 [2024-10-24 12:34:11,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609461770] [2024-10-24 12:34:11,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:34:11,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-24 12:34:11,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:34:11,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-24 12:34:11,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2024-10-24 12:34:11,684 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-10-24 12:34:11,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 77 transitions, 426 flow. Second operand has 23 states, 23 states have (on average 16.47826086956522) internal successors, (379), 23 states have internal predecessors, (379), 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) [2024-10-24 12:34:11,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:34:11,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-10-24 12:34:11,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand