./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/chl-chromosome-symm.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 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:23:52,997 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:23:53,060 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:23:53,066 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:23:53,067 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:23:53,089 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:23:53,089 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:23:53,090 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:23:53,090 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:23:53,091 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:23:53,091 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:23:53,091 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:23:53,092 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:23:53,092 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:23:53,092 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:23:53,093 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:23:53,093 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:23:53,094 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:23:53,094 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:23:53,094 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:23:53,094 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:23:53,099 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:23:53,099 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:23:53,100 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:23:53,100 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:23:53,100 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:23:53,100 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:23:53,101 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:23:53,101 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:23:53,101 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:23:53,101 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:23:53,102 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:23:53,102 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:23:53,102 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:23:53,102 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:23:53,103 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:23:53,103 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:23:53,103 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:23:53,104 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:23:53,105 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:23:53,105 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:23:53,106 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:23:53,106 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa [2024-11-16 19:23:53,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:23:53,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:23:53,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:23:53,413 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:23:53,413 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:23:53,414 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-11-16 19:23:54,836 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:23:55,015 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:23:55,016 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-11-16 19:23:55,023 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc5ff514e/aa9a0a113ae047c9ada5847d8cd59d58/FLAG3818b0b98 [2024-11-16 19:23:55,036 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc5ff514e/aa9a0a113ae047c9ada5847d8cd59d58 [2024-11-16 19:23:55,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:23:55,042 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:23:55,043 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:23:55,043 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:23:55,049 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:23:55,050 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:23:55" (1/1) ... [2024-11-16 19:23:55,050 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69efc892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:55, skipping insertion in model container [2024-11-16 19:23:55,051 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:23:55" (1/1) ... [2024-11-16 19:23:55,075 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:23:55,250 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c[2721,2734] [2024-11-16 19:23:55,261 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:23:55,269 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:23:55,290 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c[2721,2734] [2024-11-16 19:23:55,294 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:23:55,312 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:23:55,313 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:55 WrapperNode [2024-11-16 19:23:55,313 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:23:55,314 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:23:55,314 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:23:55,314 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:23:55,320 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:55" (1/1) ... [2024-11-16 19:23:55,327 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:55" (1/1) ... [2024-11-16 19:23:55,355 INFO L138 Inliner]: procedures = 24, calls = 27, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 187 [2024-11-16 19:23:55,355 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:23:55,356 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:23:55,356 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:23:55,356 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:23:55,364 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:55" (1/1) ... [2024-11-16 19:23:55,365 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:55" (1/1) ... [2024-11-16 19:23:55,367 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:55" (1/1) ... [2024-11-16 19:23:55,383 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-16 19:23:55,383 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:55" (1/1) ... [2024-11-16 19:23:55,384 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:55" (1/1) ... [2024-11-16 19:23:55,390 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:55" (1/1) ... [2024-11-16 19:23:55,393 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:55" (1/1) ... [2024-11-16 19:23:55,394 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:55" (1/1) ... [2024-11-16 19:23:55,395 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:55" (1/1) ... [2024-11-16 19:23:55,398 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:23:55,399 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:23:55,399 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:23:55,399 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:23:55,400 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:55" (1/1) ... [2024-11-16 19:23:55,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:23:55,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:23:55,428 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 19:23:55,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 19:23:55,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:23:55,477 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-16 19:23:55,477 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-16 19:23:55,477 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-16 19:23:55,477 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-16 19:23:55,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:23:55,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 19:23:55,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 19:23:55,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 19:23:55,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-16 19:23:55,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:23:55,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:23:55,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 19:23:55,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 19:23:55,483 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:23:55,612 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:23:55,614 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:23:55,947 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:23:55,947 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:23:56,214 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:23:56,214 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:23:56,215 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:23:56 BoogieIcfgContainer [2024-11-16 19:23:56,215 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:23:56,217 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:23:56,219 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:23:56,222 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:23:56,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:23:55" (1/3) ... [2024-11-16 19:23:56,224 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d70a39a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:23:56, skipping insertion in model container [2024-11-16 19:23:56,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:55" (2/3) ... [2024-11-16 19:23:56,225 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d70a39a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:23:56, skipping insertion in model container [2024-11-16 19:23:56,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:23:56" (3/3) ... [2024-11-16 19:23:56,226 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2024-11-16 19:23:56,243 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:23:56,244 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:23:56,244 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:23:56,295 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-16 19:23:56,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 34 transitions, 82 flow [2024-11-16 19:23:56,363 INFO L124 PetriNetUnfolderBase]: 8/32 cut-off events. [2024-11-16 19:23:56,367 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:23:56,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 8/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 26 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-11-16 19:23:56,371 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 34 transitions, 82 flow [2024-11-16 19:23:56,374 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 31 transitions, 74 flow [2024-11-16 19:23:56,383 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:23:56,389 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;@4bafe9fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:23:56,389 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-16 19:23:56,402 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:23:56,402 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2024-11-16 19:23:56,402 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:23:56,403 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:23:56,403 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:23:56,404 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:23:56,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:23:56,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1335573352, now seen corresponding path program 1 times [2024-11-16 19:23:56,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:23:56,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103148164] [2024-11-16 19:23:56,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:23:56,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:23:56,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:23:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:23:56,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:23:56,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103148164] [2024-11-16 19:23:56,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103148164] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:23:56,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:23:56,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:23:56,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939941797] [2024-11-16 19:23:56,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:23:56,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:23:56,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:23:56,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:23:56,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:23:56,698 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-11-16 19:23:56,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:23:56,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:23:56,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-11-16 19:23:56,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:23:56,769 INFO L124 PetriNetUnfolderBase]: 39/92 cut-off events. [2024-11-16 19:23:56,770 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-16 19:23:56,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 92 events. 39/92 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 219 event pairs, 22 based on Foata normal form. 17/104 useless extension candidates. Maximal degree in co-relation 136. Up to 72 conditions per place. [2024-11-16 19:23:56,774 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 18 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2024-11-16 19:23:56,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 102 flow [2024-11-16 19:23:56,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:23:56,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:23:56,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 44 transitions. [2024-11-16 19:23:56,814 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-11-16 19:23:56,816 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 74 flow. Second operand 2 states and 44 transitions. [2024-11-16 19:23:56,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 102 flow [2024-11-16 19:23:56,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 94 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-16 19:23:56,821 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 58 flow [2024-11-16 19:23:56,823 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=58, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2024-11-16 19:23:56,826 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2024-11-16 19:23:56,827 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 58 flow [2024-11-16 19:23:56,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:23:56,827 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:23:56,828 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] [2024-11-16 19:23:56,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:23:56,828 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:23:56,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:23:56,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1963043629, now seen corresponding path program 1 times [2024-11-16 19:23:56,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:23:56,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473458820] [2024-11-16 19:23:56,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:23:56,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:23:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:23:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:23:57,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:23:57,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473458820] [2024-11-16 19:23:57,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473458820] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:23:57,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:23:57,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:23:57,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37586463] [2024-11-16 19:23:57,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:23:57,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:23:57,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:23:57,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:23:57,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:23:57,093 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:23:57,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:23:57,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:23:57,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:23:57,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:23:57,170 INFO L124 PetriNetUnfolderBase]: 39/96 cut-off events. [2024-11-16 19:23:57,171 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:23:57,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 96 events. 39/96 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 221 event pairs, 22 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 175. Up to 74 conditions per place. [2024-11-16 19:23:57,174 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 18 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2024-11-16 19:23:57,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 29 transitions, 106 flow [2024-11-16 19:23:57,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:23:57,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:23:57,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2024-11-16 19:23:57,177 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-16 19:23:57,177 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 58 flow. Second operand 3 states and 51 transitions. [2024-11-16 19:23:57,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 29 transitions, 106 flow [2024-11-16 19:23:57,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 106 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:23:57,181 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 82 flow [2024-11-16 19:23:57,183 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2024-11-16 19:23:57,184 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2024-11-16 19:23:57,184 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 82 flow [2024-11-16 19:23:57,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:23:57,184 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:23:57,184 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:23:57,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:23:57,185 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:23:57,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:23:57,185 INFO L85 PathProgramCache]: Analyzing trace with hash -794018874, now seen corresponding path program 1 times [2024-11-16 19:23:57,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:23:57,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177353930] [2024-11-16 19:23:57,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:23:57,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:23:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:23:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:23:57,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:23:57,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177353930] [2024-11-16 19:23:57,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177353930] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:23:57,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760732847] [2024-11-16 19:23:57,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:23:57,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:23:57,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:23:57,364 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:23:57,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 19:23:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:23:57,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-16 19:23:57,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:23:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:23:57,571 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:23:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:23:57,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760732847] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:23:57,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:23:57,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-16 19:23:57,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248243657] [2024-11-16 19:23:57,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:23:57,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-16 19:23:57,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:23:57,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-16 19:23:57,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-11-16 19:23:57,608 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:23:57,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 82 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:23:57,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:23:57,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:23:57,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:23:57,713 INFO L124 PetriNetUnfolderBase]: 39/108 cut-off events. [2024-11-16 19:23:57,713 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-16 19:23:57,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 108 events. 39/108 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 221 event pairs, 22 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 209. Up to 74 conditions per place. [2024-11-16 19:23:57,714 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 18 selfloop transitions, 10 changer transitions 0/35 dead transitions. [2024-11-16 19:23:57,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 162 flow [2024-11-16 19:23:57,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:23:57,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:23:57,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 88 transitions. [2024-11-16 19:23:57,717 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43137254901960786 [2024-11-16 19:23:57,717 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 82 flow. Second operand 6 states and 88 transitions. [2024-11-16 19:23:57,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 162 flow [2024-11-16 19:23:57,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 35 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:23:57,718 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 150 flow [2024-11-16 19:23:57,719 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=150, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2024-11-16 19:23:57,719 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-11-16 19:23:57,719 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 150 flow [2024-11-16 19:23:57,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:23:57,720 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:23:57,720 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:23:57,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-16 19:23:57,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:23:57,925 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:23:57,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:23:57,926 INFO L85 PathProgramCache]: Analyzing trace with hash 456791057, now seen corresponding path program 2 times [2024-11-16 19:23:57,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:23:57,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678186985] [2024-11-16 19:23:57,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:23:57,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:23:57,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:23:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-16 19:23:58,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:23:58,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678186985] [2024-11-16 19:23:58,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678186985] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:23:58,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315975740] [2024-11-16 19:23:58,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:23:58,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:23:58,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:23:58,200 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:23:58,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 19:23:58,350 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-16 19:23:58,350 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:23:58,351 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-16 19:23:58,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:23:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-16 19:23:58,487 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 19:23:58,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315975740] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:23:58,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 19:23:58,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-11-16 19:23:58,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063431504] [2024-11-16 19:23:58,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:23:58,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:23:58,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:23:58,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:23:58,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-11-16 19:23:58,490 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-11-16 19:23:58,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:23:58,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:23:58,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-11-16 19:23:58,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:23:58,601 INFO L124 PetriNetUnfolderBase]: 81/194 cut-off events. [2024-11-16 19:23:58,601 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-11-16 19:23:58,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406 conditions, 194 events. 81/194 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 608 event pairs, 24 based on Foata normal form. 5/180 useless extension candidates. Maximal degree in co-relation 398. Up to 99 conditions per place. [2024-11-16 19:23:58,603 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 39 selfloop transitions, 3 changer transitions 2/52 dead transitions. [2024-11-16 19:23:58,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 52 transitions, 276 flow [2024-11-16 19:23:58,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:23:58,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:23:58,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2024-11-16 19:23:58,606 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5661764705882353 [2024-11-16 19:23:58,607 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 150 flow. Second operand 4 states and 77 transitions. [2024-11-16 19:23:58,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 52 transitions, 276 flow [2024-11-16 19:23:58,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 52 transitions, 260 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-16 19:23:58,609 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 154 flow [2024-11-16 19:23:58,609 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2024-11-16 19:23:58,610 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 11 predicate places. [2024-11-16 19:23:58,611 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 154 flow [2024-11-16 19:23:58,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:23:58,612 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:23:58,612 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:23:58,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 19:23:58,812 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,SelfDestructingSolverStorable3 [2024-11-16 19:23:58,813 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:23:58,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:23:58,813 INFO L85 PathProgramCache]: Analyzing trace with hash -179755557, now seen corresponding path program 3 times [2024-11-16 19:23:58,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:23:58,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733073141] [2024-11-16 19:23:58,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:23:58,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:23:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:23:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-16 19:23:58,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:23:58,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733073141] [2024-11-16 19:23:58,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733073141] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:23:58,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256668586] [2024-11-16 19:23:58,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:23:58,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:23:58,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:23:58,966 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:23:58,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 19:23:59,071 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-16 19:23:59,071 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:23:59,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-16 19:23:59,075 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:23:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-16 19:23:59,175 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 19:23:59,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256668586] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:23:59,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 19:23:59,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-11-16 19:23:59,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194390789] [2024-11-16 19:23:59,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:23:59,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:23:59,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:23:59,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:23:59,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-11-16 19:23:59,181 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-11-16 19:23:59,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:23:59,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:23:59,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-11-16 19:23:59,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:23:59,329 INFO L124 PetriNetUnfolderBase]: 125/281 cut-off events. [2024-11-16 19:23:59,329 INFO L125 PetriNetUnfolderBase]: For 135/156 co-relation queries the response was YES. [2024-11-16 19:23:59,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 281 events. 125/281 cut-off events. For 135/156 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1072 event pairs, 54 based on Foata normal form. 14/265 useless extension candidates. Maximal degree in co-relation 634. Up to 155 conditions per place. [2024-11-16 19:23:59,334 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 41 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2024-11-16 19:23:59,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 290 flow [2024-11-16 19:23:59,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:23:59,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:23:59,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2024-11-16 19:23:59,336 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5441176470588235 [2024-11-16 19:23:59,337 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 154 flow. Second operand 4 states and 74 transitions. [2024-11-16 19:23:59,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 290 flow [2024-11-16 19:23:59,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 53 transitions, 285 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:23:59,340 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 172 flow [2024-11-16 19:23:59,341 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-11-16 19:23:59,342 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2024-11-16 19:23:59,342 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 172 flow [2024-11-16 19:23:59,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:23:59,343 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:23:59,343 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:23:59,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-16 19:23:59,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:23:59,548 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:23:59,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:23:59,548 INFO L85 PathProgramCache]: Analyzing trace with hash -215715057, now seen corresponding path program 4 times [2024-11-16 19:23:59,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:23:59,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199489854] [2024-11-16 19:23:59,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:23:59,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:23:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:23:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-16 19:23:59,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:23:59,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199489854] [2024-11-16 19:23:59,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199489854] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:23:59,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675144858] [2024-11-16 19:23:59,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 19:23:59,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:23:59,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:23:59,683 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) [2024-11-16 19:23:59,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 19:23:59,786 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 19:23:59,787 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:23:59,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-16 19:23:59,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:23:59,866 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-16 19:23:59,867 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:23:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-16 19:23:59,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675144858] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:23:59,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:23:59,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-16 19:23:59,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142464772] [2024-11-16 19:23:59,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:23:59,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 19:23:59,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:23:59,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 19:23:59,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2024-11-16 19:23:59,917 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:23:59,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 172 flow. Second operand has 13 states, 13 states have (on average 11.23076923076923) internal successors, (146), 13 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:23:59,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:23:59,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:23:59,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:00,020 INFO L124 PetriNetUnfolderBase]: 93/248 cut-off events. [2024-11-16 19:24:00,020 INFO L125 PetriNetUnfolderBase]: For 208/224 co-relation queries the response was YES. [2024-11-16 19:24:00,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 248 events. 93/248 cut-off events. For 208/224 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 962 event pairs, 67 based on Foata normal form. 11/249 useless extension candidates. Maximal degree in co-relation 608. Up to 177 conditions per place. [2024-11-16 19:24:00,022 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 20 selfloop transitions, 12 changer transitions 0/41 dead transitions. [2024-11-16 19:24:00,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 41 transitions, 248 flow [2024-11-16 19:24:00,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 19:24:00,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-16 19:24:00,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-11-16 19:24:00,023 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39915966386554624 [2024-11-16 19:24:00,024 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 172 flow. Second operand 7 states and 95 transitions. [2024-11-16 19:24:00,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 41 transitions, 248 flow [2024-11-16 19:24:00,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 41 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:24:00,032 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 218 flow [2024-11-16 19:24:00,032 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=218, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2024-11-16 19:24:00,032 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 21 predicate places. [2024-11-16 19:24:00,032 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 218 flow [2024-11-16 19:24:00,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.23076923076923) internal successors, (146), 13 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:00,033 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:00,033 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:00,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-16 19:24:00,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:00,233 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:00,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:00,234 INFO L85 PathProgramCache]: Analyzing trace with hash 141504118, now seen corresponding path program 5 times [2024-11-16 19:24:00,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:00,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859072291] [2024-11-16 19:24:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:00,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:00,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:00,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859072291] [2024-11-16 19:24:00,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859072291] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:24:00,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:24:00,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:24:00,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092306803] [2024-11-16 19:24:00,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:24:00,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:24:00,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:00,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:24:00,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:24:00,497 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-11-16 19:24:00,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 218 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:00,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:00,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-11-16 19:24:00,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:00,613 INFO L124 PetriNetUnfolderBase]: 139/327 cut-off events. [2024-11-16 19:24:00,613 INFO L125 PetriNetUnfolderBase]: For 309/333 co-relation queries the response was YES. [2024-11-16 19:24:00,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 833 conditions, 327 events. 139/327 cut-off events. For 309/333 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1351 event pairs, 46 based on Foata normal form. 20/335 useless extension candidates. Maximal degree in co-relation 819. Up to 218 conditions per place. [2024-11-16 19:24:00,616 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 41 selfloop transitions, 5 changer transitions 1/56 dead transitions. [2024-11-16 19:24:00,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 56 transitions, 364 flow [2024-11-16 19:24:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:24:00,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:24:00,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2024-11-16 19:24:00,617 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2024-11-16 19:24:00,617 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 218 flow. Second operand 4 states and 72 transitions. [2024-11-16 19:24:00,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 56 transitions, 364 flow [2024-11-16 19:24:00,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 56 transitions, 336 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-16 19:24:00,620 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 223 flow [2024-11-16 19:24:00,620 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=223, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-11-16 19:24:00,620 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 21 predicate places. [2024-11-16 19:24:00,620 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 223 flow [2024-11-16 19:24:00,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:00,621 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:00,621 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:00,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-16 19:24:00,621 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:00,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:00,621 INFO L85 PathProgramCache]: Analyzing trace with hash -756034116, now seen corresponding path program 6 times [2024-11-16 19:24:00,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:00,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514110644] [2024-11-16 19:24:00,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:00,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:00,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:00,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:00,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514110644] [2024-11-16 19:24:00,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514110644] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:24:00,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:24:00,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:24:00,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326103182] [2024-11-16 19:24:00,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:24:00,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:24:00,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:00,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:24:00,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:24:00,801 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-11-16 19:24:00,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 223 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:00,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:00,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-11-16 19:24:00,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:00,908 INFO L124 PetriNetUnfolderBase]: 137/324 cut-off events. [2024-11-16 19:24:00,908 INFO L125 PetriNetUnfolderBase]: For 467/480 co-relation queries the response was YES. [2024-11-16 19:24:00,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 324 events. 137/324 cut-off events. For 467/480 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1312 event pairs, 33 based on Foata normal form. 13/316 useless extension candidates. Maximal degree in co-relation 876. Up to 187 conditions per place. [2024-11-16 19:24:00,911 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 40 selfloop transitions, 6 changer transitions 1/56 dead transitions. [2024-11-16 19:24:00,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 56 transitions, 369 flow [2024-11-16 19:24:00,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:24:00,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:24:00,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-11-16 19:24:00,912 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5147058823529411 [2024-11-16 19:24:00,912 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 223 flow. Second operand 4 states and 70 transitions. [2024-11-16 19:24:00,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 56 transitions, 369 flow [2024-11-16 19:24:00,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 365 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:24:00,915 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 258 flow [2024-11-16 19:24:00,915 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=258, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2024-11-16 19:24:00,916 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2024-11-16 19:24:00,916 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 258 flow [2024-11-16 19:24:00,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:00,916 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:00,916 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:00,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-16 19:24:00,916 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:00,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:00,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1794246243, now seen corresponding path program 1 times [2024-11-16 19:24:00,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:00,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278081604] [2024-11-16 19:24:00,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:00,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-16 19:24:01,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:01,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278081604] [2024-11-16 19:24:01,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278081604] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:24:01,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:24:01,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:24:01,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685971597] [2024-11-16 19:24:01,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:24:01,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:24:01,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:01,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:24:01,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:24:01,125 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-11-16 19:24:01,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 258 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:01,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:01,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-11-16 19:24:01,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:01,239 INFO L124 PetriNetUnfolderBase]: 116/277 cut-off events. [2024-11-16 19:24:01,239 INFO L125 PetriNetUnfolderBase]: For 609/620 co-relation queries the response was YES. [2024-11-16 19:24:01,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 833 conditions, 277 events. 116/277 cut-off events. For 609/620 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1026 event pairs, 48 based on Foata normal form. 11/269 useless extension candidates. Maximal degree in co-relation 815. Up to 170 conditions per place. [2024-11-16 19:24:01,241 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 41 selfloop transitions, 6 changer transitions 3/59 dead transitions. [2024-11-16 19:24:01,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 59 transitions, 417 flow [2024-11-16 19:24:01,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:24:01,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:24:01,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2024-11-16 19:24:01,242 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5441176470588235 [2024-11-16 19:24:01,243 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 258 flow. Second operand 4 states and 74 transitions. [2024-11-16 19:24:01,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 59 transitions, 417 flow [2024-11-16 19:24:01,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 59 transitions, 410 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-16 19:24:01,245 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 281 flow [2024-11-16 19:24:01,246 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=281, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2024-11-16 19:24:01,246 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 28 predicate places. [2024-11-16 19:24:01,246 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 281 flow [2024-11-16 19:24:01,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:01,247 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:01,247 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:01,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-16 19:24:01,247 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:01,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:01,248 INFO L85 PathProgramCache]: Analyzing trace with hash -726132665, now seen corresponding path program 1 times [2024-11-16 19:24:01,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:01,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105569210] [2024-11-16 19:24:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:01,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-16 19:24:01,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:01,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105569210] [2024-11-16 19:24:01,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105569210] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:24:01,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:24:01,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:24:01,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117017590] [2024-11-16 19:24:01,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:24:01,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:24:01,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:01,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:24:01,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:24:01,489 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-11-16 19:24:01,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 281 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:01,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:01,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-11-16 19:24:01,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:01,599 INFO L124 PetriNetUnfolderBase]: 97/228 cut-off events. [2024-11-16 19:24:01,601 INFO L125 PetriNetUnfolderBase]: For 774/785 co-relation queries the response was YES. [2024-11-16 19:24:01,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 228 events. 97/228 cut-off events. For 774/785 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 736 event pairs, 33 based on Foata normal form. 7/220 useless extension candidates. Maximal degree in co-relation 740. Up to 145 conditions per place. [2024-11-16 19:24:01,604 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 42 selfloop transitions, 7 changer transitions 2/59 dead transitions. [2024-11-16 19:24:01,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 447 flow [2024-11-16 19:24:01,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:24:01,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:24:01,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-11-16 19:24:01,605 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5367647058823529 [2024-11-16 19:24:01,605 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 281 flow. Second operand 4 states and 73 transitions. [2024-11-16 19:24:01,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 447 flow [2024-11-16 19:24:01,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 59 transitions, 421 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-11-16 19:24:01,608 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 296 flow [2024-11-16 19:24:01,608 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=296, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2024-11-16 19:24:01,611 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 28 predicate places. [2024-11-16 19:24:01,612 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 296 flow [2024-11-16 19:24:01,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:01,613 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:01,613 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:01,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-16 19:24:01,613 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:01,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:01,614 INFO L85 PathProgramCache]: Analyzing trace with hash -953234524, now seen corresponding path program 1 times [2024-11-16 19:24:01,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:01,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922057449] [2024-11-16 19:24:01,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:01,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:02,610 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:02,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:02,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922057449] [2024-11-16 19:24:02,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922057449] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:24:02,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331951714] [2024-11-16 19:24:02,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:02,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:02,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:24:02,614 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:24:02,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 19:24:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:02,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-16 19:24:02,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:24:02,889 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:24:02,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-16 19:24:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:02,960 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:24:03,639 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-16 19:24:03,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 79 [2024-11-16 19:24:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:03,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331951714] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:24:03,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:24:03,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-11-16 19:24:03,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586941028] [2024-11-16 19:24:03,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:24:03,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-16 19:24:03,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:03,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-16 19:24:03,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2024-11-16 19:24:03,733 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:24:03,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 296 flow. Second operand has 28 states, 28 states have (on average 10.857142857142858) internal successors, (304), 28 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:03,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:03,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:24:03,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:04,912 INFO L124 PetriNetUnfolderBase]: 241/501 cut-off events. [2024-11-16 19:24:04,912 INFO L125 PetriNetUnfolderBase]: For 1211/1215 co-relation queries the response was YES. [2024-11-16 19:24:04,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1531 conditions, 501 events. 241/501 cut-off events. For 1211/1215 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2091 event pairs, 24 based on Foata normal form. 5/437 useless extension candidates. Maximal degree in co-relation 1512. Up to 162 conditions per place. [2024-11-16 19:24:04,916 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 73 selfloop transitions, 30 changer transitions 8/118 dead transitions. [2024-11-16 19:24:04,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 118 transitions, 812 flow [2024-11-16 19:24:04,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-16 19:24:04,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-16 19:24:04,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 245 transitions. [2024-11-16 19:24:04,918 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42387543252595156 [2024-11-16 19:24:04,918 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 296 flow. Second operand 17 states and 245 transitions. [2024-11-16 19:24:04,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 118 transitions, 812 flow [2024-11-16 19:24:04,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 118 transitions, 768 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-16 19:24:04,922 INFO L231 Difference]: Finished difference. Result has 79 places, 67 transitions, 512 flow [2024-11-16 19:24:04,922 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=512, PETRI_PLACES=79, PETRI_TRANSITIONS=67} [2024-11-16 19:24:04,922 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 49 predicate places. [2024-11-16 19:24:04,923 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 67 transitions, 512 flow [2024-11-16 19:24:04,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 10.857142857142858) internal successors, (304), 28 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:04,923 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:04,923 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:04,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-16 19:24:05,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-16 19:24:05,128 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:05,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:05,128 INFO L85 PathProgramCache]: Analyzing trace with hash 968053206, now seen corresponding path program 2 times [2024-11-16 19:24:05,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:05,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349858727] [2024-11-16 19:24:05,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:05,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:05,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-16 19:24:06,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:06,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349858727] [2024-11-16 19:24:06,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349858727] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:24:06,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355796842] [2024-11-16 19:24:06,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:24:06,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:06,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:24:06,517 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:24:06,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 19:24:06,641 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:24:06,641 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:24:06,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-16 19:24:06,645 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:24:06,896 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:24:06,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-16 19:24:06,970 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:06,972 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:24:07,570 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-16 19:24:07,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-16 19:24:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:07,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355796842] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:24:07,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:24:07,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 10] total 34 [2024-11-16 19:24:07,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905868623] [2024-11-16 19:24:07,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:24:07,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-16 19:24:07,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:07,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-16 19:24:07,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2024-11-16 19:24:07,726 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-16 19:24:07,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 67 transitions, 512 flow. Second operand has 34 states, 34 states have (on average 8.794117647058824) internal successors, (299), 34 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:07,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:07,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-16 19:24:07,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:08,785 INFO L124 PetriNetUnfolderBase]: 264/545 cut-off events. [2024-11-16 19:24:08,786 INFO L125 PetriNetUnfolderBase]: For 2077/2081 co-relation queries the response was YES. [2024-11-16 19:24:08,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2155 conditions, 545 events. 264/545 cut-off events. For 2077/2081 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2354 event pairs, 48 based on Foata normal form. 5/501 useless extension candidates. Maximal degree in co-relation 2128. Up to 356 conditions per place. [2024-11-16 19:24:08,791 INFO L140 encePairwiseOnDemand]: 20/34 looper letters, 58 selfloop transitions, 35 changer transitions 1/99 dead transitions. [2024-11-16 19:24:08,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 99 transitions, 875 flow [2024-11-16 19:24:08,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-16 19:24:08,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-16 19:24:08,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 195 transitions. [2024-11-16 19:24:08,793 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31862745098039214 [2024-11-16 19:24:08,793 INFO L175 Difference]: Start difference. First operand has 79 places, 67 transitions, 512 flow. Second operand 18 states and 195 transitions. [2024-11-16 19:24:08,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 99 transitions, 875 flow [2024-11-16 19:24:08,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 99 transitions, 817 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-16 19:24:08,800 INFO L231 Difference]: Finished difference. Result has 94 places, 80 transitions, 660 flow [2024-11-16 19:24:08,800 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=660, PETRI_PLACES=94, PETRI_TRANSITIONS=80} [2024-11-16 19:24:08,802 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 64 predicate places. [2024-11-16 19:24:08,803 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 80 transitions, 660 flow [2024-11-16 19:24:08,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 8.794117647058824) internal successors, (299), 34 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:08,804 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:08,804 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:08,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-16 19:24:09,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:09,008 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:09,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:09,008 INFO L85 PathProgramCache]: Analyzing trace with hash -887864840, now seen corresponding path program 3 times [2024-11-16 19:24:09,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:09,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845401973] [2024-11-16 19:24:09,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:09,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:09,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:09,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:09,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845401973] [2024-11-16 19:24:09,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845401973] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:24:09,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780091763] [2024-11-16 19:24:09,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:24:09,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:09,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:24:09,813 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:24:09,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 19:24:09,928 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-16 19:24:09,928 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:24:09,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-16 19:24:09,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:24:10,161 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:24:10,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-16 19:24:10,230 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:10,231 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:24:10,857 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-16 19:24:10,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-16 19:24:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:10,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780091763] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:24:10,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:24:10,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2024-11-16 19:24:10,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111387186] [2024-11-16 19:24:10,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:24:10,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-16 19:24:10,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:10,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-16 19:24:10,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2024-11-16 19:24:11,087 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:24:11,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 80 transitions, 660 flow. Second operand has 28 states, 28 states have (on average 10.785714285714286) internal successors, (302), 28 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:11,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:11,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:24:11,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:11,887 INFO L124 PetriNetUnfolderBase]: 294/598 cut-off events. [2024-11-16 19:24:11,887 INFO L125 PetriNetUnfolderBase]: For 2844/2848 co-relation queries the response was YES. [2024-11-16 19:24:11,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2547 conditions, 598 events. 294/598 cut-off events. For 2844/2848 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2660 event pairs, 45 based on Foata normal form. 5/581 useless extension candidates. Maximal degree in co-relation 2518. Up to 396 conditions per place. [2024-11-16 19:24:11,893 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 75 selfloop transitions, 27 changer transitions 2/111 dead transitions. [2024-11-16 19:24:11,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 111 transitions, 1045 flow [2024-11-16 19:24:11,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-16 19:24:11,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-16 19:24:11,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 178 transitions. [2024-11-16 19:24:11,894 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40271493212669685 [2024-11-16 19:24:11,894 INFO L175 Difference]: Start difference. First operand has 94 places, 80 transitions, 660 flow. Second operand 13 states and 178 transitions. [2024-11-16 19:24:11,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 111 transitions, 1045 flow [2024-11-16 19:24:11,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 111 transitions, 970 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-11-16 19:24:11,903 INFO L231 Difference]: Finished difference. Result has 98 places, 90 transitions, 762 flow [2024-11-16 19:24:11,904 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=762, PETRI_PLACES=98, PETRI_TRANSITIONS=90} [2024-11-16 19:24:11,905 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 68 predicate places. [2024-11-16 19:24:11,905 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 90 transitions, 762 flow [2024-11-16 19:24:11,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 10.785714285714286) internal successors, (302), 28 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:11,906 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:11,906 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:11,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-16 19:24:12,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:12,107 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:12,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:12,108 INFO L85 PathProgramCache]: Analyzing trace with hash -476919454, now seen corresponding path program 4 times [2024-11-16 19:24:12,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:12,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84203293] [2024-11-16 19:24:12,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:12,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:12,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:12,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:12,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84203293] [2024-11-16 19:24:12,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84203293] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:24:12,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29601999] [2024-11-16 19:24:12,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 19:24:12,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:12,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:24:12,867 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:24:12,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-16 19:24:12,988 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 19:24:12,988 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:24:12,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-16 19:24:12,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:24:13,079 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:24:13,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-16 19:24:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:13,191 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:24:13,633 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-16 19:24:13,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-16 19:24:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:13,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29601999] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:24:13,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:24:13,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-11-16 19:24:13,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231351758] [2024-11-16 19:24:13,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:24:13,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-16 19:24:13,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:13,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-16 19:24:13,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2024-11-16 19:24:13,774 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:24:13,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 90 transitions, 762 flow. Second operand has 27 states, 27 states have (on average 10.74074074074074) internal successors, (290), 27 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:13,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:13,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:24:13,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:14,465 INFO L124 PetriNetUnfolderBase]: 309/631 cut-off events. [2024-11-16 19:24:14,466 INFO L125 PetriNetUnfolderBase]: For 3594/3598 co-relation queries the response was YES. [2024-11-16 19:24:14,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2925 conditions, 631 events. 309/631 cut-off events. For 3594/3598 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2879 event pairs, 48 based on Foata normal form. 5/632 useless extension candidates. Maximal degree in co-relation 2895. Up to 421 conditions per place. [2024-11-16 19:24:14,472 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 74 selfloop transitions, 31 changer transitions 9/121 dead transitions. [2024-11-16 19:24:14,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 121 transitions, 1213 flow [2024-11-16 19:24:14,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-16 19:24:14,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-16 19:24:14,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 200 transitions. [2024-11-16 19:24:14,474 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39215686274509803 [2024-11-16 19:24:14,474 INFO L175 Difference]: Start difference. First operand has 98 places, 90 transitions, 762 flow. Second operand 15 states and 200 transitions. [2024-11-16 19:24:14,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 121 transitions, 1213 flow [2024-11-16 19:24:14,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 121 transitions, 1085 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-11-16 19:24:14,486 INFO L231 Difference]: Finished difference. Result has 109 places, 97 transitions, 845 flow [2024-11-16 19:24:14,486 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=845, PETRI_PLACES=109, PETRI_TRANSITIONS=97} [2024-11-16 19:24:14,487 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 79 predicate places. [2024-11-16 19:24:14,487 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 97 transitions, 845 flow [2024-11-16 19:24:14,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 10.74074074074074) internal successors, (290), 27 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:14,487 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:14,487 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:14,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-16 19:24:14,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-16 19:24:14,688 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:14,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:14,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1056787448, now seen corresponding path program 5 times [2024-11-16 19:24:14,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:14,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749451215] [2024-11-16 19:24:14,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:14,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:15,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:15,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749451215] [2024-11-16 19:24:15,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749451215] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:24:15,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506922974] [2024-11-16 19:24:15,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 19:24:15,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:15,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:24:15,435 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:24:15,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-16 19:24:15,594 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-16 19:24:15,594 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:24:15,596 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-16 19:24:15,597 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:24:15,770 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:24:15,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-16 19:24:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:15,862 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:24:16,305 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-16 19:24:16,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 234 treesize of output 135 [2024-11-16 19:24:16,445 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:16,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506922974] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:24:16,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:24:16,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 28 [2024-11-16 19:24:16,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931624768] [2024-11-16 19:24:16,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:24:16,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-16 19:24:16,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:16,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-16 19:24:16,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2024-11-16 19:24:16,526 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:24:16,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 97 transitions, 845 flow. Second operand has 28 states, 28 states have (on average 11.071428571428571) internal successors, (310), 28 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:16,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:16,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:24:16,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:17,350 INFO L124 PetriNetUnfolderBase]: 309/637 cut-off events. [2024-11-16 19:24:17,350 INFO L125 PetriNetUnfolderBase]: For 4087/4091 co-relation queries the response was YES. [2024-11-16 19:24:17,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3045 conditions, 637 events. 309/637 cut-off events. For 4087/4091 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2958 event pairs, 48 based on Foata normal form. 17/652 useless extension candidates. Maximal degree in co-relation 3011. Up to 400 conditions per place. [2024-11-16 19:24:17,355 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 74 selfloop transitions, 30 changer transitions 15/126 dead transitions. [2024-11-16 19:24:17,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 126 transitions, 1254 flow [2024-11-16 19:24:17,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-16 19:24:17,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-16 19:24:17,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 217 transitions. [2024-11-16 19:24:17,357 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39889705882352944 [2024-11-16 19:24:17,357 INFO L175 Difference]: Start difference. First operand has 109 places, 97 transitions, 845 flow. Second operand 16 states and 217 transitions. [2024-11-16 19:24:17,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 126 transitions, 1254 flow [2024-11-16 19:24:17,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 126 transitions, 1176 flow, removed 14 selfloop flow, removed 12 redundant places. [2024-11-16 19:24:17,368 INFO L231 Difference]: Finished difference. Result has 113 places, 94 transitions, 831 flow [2024-11-16 19:24:17,368 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=831, PETRI_PLACES=113, PETRI_TRANSITIONS=94} [2024-11-16 19:24:17,369 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 83 predicate places. [2024-11-16 19:24:17,369 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 94 transitions, 831 flow [2024-11-16 19:24:17,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 11.071428571428571) internal successors, (310), 28 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:17,369 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:17,369 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:17,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-16 19:24:17,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-16 19:24:17,570 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:17,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:17,571 INFO L85 PathProgramCache]: Analyzing trace with hash -848662192, now seen corresponding path program 6 times [2024-11-16 19:24:17,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:17,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525447301] [2024-11-16 19:24:17,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:17,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:18,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:18,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525447301] [2024-11-16 19:24:18,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525447301] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:24:18,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190228243] [2024-11-16 19:24:18,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 19:24:18,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:18,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:24:18,219 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:24:18,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-16 19:24:18,330 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-16 19:24:18,330 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:24:18,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-16 19:24:18,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:24:18,480 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:24:18,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-16 19:24:18,574 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:18,574 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:24:19,013 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-16 19:24:19,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-16 19:24:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:19,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190228243] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:24:19,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:24:19,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2024-11-16 19:24:19,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743004183] [2024-11-16 19:24:19,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:24:19,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-16 19:24:19,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:19,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-16 19:24:19,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2024-11-16 19:24:19,140 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:24:19,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 94 transitions, 831 flow. Second operand has 28 states, 28 states have (on average 10.785714285714286) internal successors, (302), 28 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:19,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:19,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:24:19,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:19,713 INFO L124 PetriNetUnfolderBase]: 304/616 cut-off events. [2024-11-16 19:24:19,713 INFO L125 PetriNetUnfolderBase]: For 4586/4590 co-relation queries the response was YES. [2024-11-16 19:24:19,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3075 conditions, 616 events. 304/616 cut-off events. For 4586/4590 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2788 event pairs, 46 based on Foata normal form. 5/619 useless extension candidates. Maximal degree in co-relation 3040. Up to 412 conditions per place. [2024-11-16 19:24:19,718 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 80 selfloop transitions, 29 changer transitions 9/125 dead transitions. [2024-11-16 19:24:19,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 125 transitions, 1277 flow [2024-11-16 19:24:19,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-16 19:24:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-16 19:24:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 190 transitions. [2024-11-16 19:24:19,719 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39915966386554624 [2024-11-16 19:24:19,719 INFO L175 Difference]: Start difference. First operand has 113 places, 94 transitions, 831 flow. Second operand 14 states and 190 transitions. [2024-11-16 19:24:19,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 125 transitions, 1277 flow [2024-11-16 19:24:19,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 125 transitions, 1165 flow, removed 35 selfloop flow, removed 15 redundant places. [2024-11-16 19:24:19,732 INFO L231 Difference]: Finished difference. Result has 112 places, 101 transitions, 887 flow [2024-11-16 19:24:19,732 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=887, PETRI_PLACES=112, PETRI_TRANSITIONS=101} [2024-11-16 19:24:19,733 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 82 predicate places. [2024-11-16 19:24:19,733 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 101 transitions, 887 flow [2024-11-16 19:24:19,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 10.785714285714286) internal successors, (302), 28 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:19,733 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:19,733 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:19,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-16 19:24:19,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-16 19:24:19,934 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:19,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:19,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1120562620, now seen corresponding path program 7 times [2024-11-16 19:24:19,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:19,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526311021] [2024-11-16 19:24:19,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:19,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:20,649 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:20,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:20,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526311021] [2024-11-16 19:24:20,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526311021] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:24:20,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355532266] [2024-11-16 19:24:20,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 19:24:20,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:20,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:24:20,652 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:24:20,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-16 19:24:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:20,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-16 19:24:20,773 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:24:20,927 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:24:20,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-16 19:24:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:20,998 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:24:21,423 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-16 19:24:21,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-16 19:24:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:21,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355532266] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:24:21,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:24:21,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-11-16 19:24:21,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498077599] [2024-11-16 19:24:21,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:24:21,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-16 19:24:21,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:21,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-16 19:24:21,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2024-11-16 19:24:21,561 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:24:21,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 101 transitions, 887 flow. Second operand has 28 states, 28 states have (on average 10.785714285714286) internal successors, (302), 28 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:21,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:21,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:24:21,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:22,325 INFO L124 PetriNetUnfolderBase]: 313/632 cut-off events. [2024-11-16 19:24:22,326 INFO L125 PetriNetUnfolderBase]: For 4916/4920 co-relation queries the response was YES. [2024-11-16 19:24:22,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3188 conditions, 632 events. 313/632 cut-off events. For 4916/4920 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2900 event pairs, 47 based on Foata normal form. 10/638 useless extension candidates. Maximal degree in co-relation 3152. Up to 407 conditions per place. [2024-11-16 19:24:22,330 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 85 selfloop transitions, 33 changer transitions 8/133 dead transitions. [2024-11-16 19:24:22,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 133 transitions, 1383 flow [2024-11-16 19:24:22,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-16 19:24:22,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-16 19:24:22,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 217 transitions. [2024-11-16 19:24:22,331 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39889705882352944 [2024-11-16 19:24:22,332 INFO L175 Difference]: Start difference. First operand has 112 places, 101 transitions, 887 flow. Second operand 16 states and 217 transitions. [2024-11-16 19:24:22,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 133 transitions, 1383 flow [2024-11-16 19:24:22,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 133 transitions, 1332 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-11-16 19:24:22,341 INFO L231 Difference]: Finished difference. Result has 122 places, 106 transitions, 993 flow [2024-11-16 19:24:22,341 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=993, PETRI_PLACES=122, PETRI_TRANSITIONS=106} [2024-11-16 19:24:22,342 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2024-11-16 19:24:22,342 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 106 transitions, 993 flow [2024-11-16 19:24:22,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 10.785714285714286) internal successors, (302), 28 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:22,342 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:22,342 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:22,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-16 19:24:22,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-16 19:24:22,543 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:22,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:22,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1987673500, now seen corresponding path program 8 times [2024-11-16 19:24:22,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:22,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308653917] [2024-11-16 19:24:22,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:22,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:23,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:23,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308653917] [2024-11-16 19:24:23,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308653917] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:24:23,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593699262] [2024-11-16 19:24:23,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:24:23,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:23,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:24:23,372 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:24:23,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-16 19:24:23,506 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:24:23,506 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:24:23,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-16 19:24:23,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:24:23,653 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:24:23,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-16 19:24:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:23,779 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:24:24,201 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-16 19:24:24,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-16 19:24:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:24,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593699262] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:24:24,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:24:24,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2024-11-16 19:24:24,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167184512] [2024-11-16 19:24:24,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:24:24,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-16 19:24:24,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:24,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-16 19:24:24,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2024-11-16 19:24:24,314 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:24:24,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 106 transitions, 993 flow. Second operand has 28 states, 28 states have (on average 10.785714285714286) internal successors, (302), 28 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:24,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:24,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:24:24,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:25,557 INFO L124 PetriNetUnfolderBase]: 389/788 cut-off events. [2024-11-16 19:24:25,557 INFO L125 PetriNetUnfolderBase]: For 8023/8027 co-relation queries the response was YES. [2024-11-16 19:24:25,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4349 conditions, 788 events. 389/788 cut-off events. For 8023/8027 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3910 event pairs, 107 based on Foata normal form. 15/799 useless extension candidates. Maximal degree in co-relation 4310. Up to 444 conditions per place. [2024-11-16 19:24:25,566 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 105 selfloop transitions, 29 changer transitions 17/158 dead transitions. [2024-11-16 19:24:25,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 158 transitions, 1789 flow [2024-11-16 19:24:25,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-16 19:24:25,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-16 19:24:25,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 226 transitions. [2024-11-16 19:24:25,569 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41544117647058826 [2024-11-16 19:24:25,569 INFO L175 Difference]: Start difference. First operand has 122 places, 106 transitions, 993 flow. Second operand 16 states and 226 transitions. [2024-11-16 19:24:25,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 158 transitions, 1789 flow [2024-11-16 19:24:25,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 158 transitions, 1671 flow, removed 35 selfloop flow, removed 13 redundant places. [2024-11-16 19:24:25,588 INFO L231 Difference]: Finished difference. Result has 128 places, 115 transitions, 1132 flow [2024-11-16 19:24:25,589 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1132, PETRI_PLACES=128, PETRI_TRANSITIONS=115} [2024-11-16 19:24:25,589 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-11-16 19:24:25,589 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 115 transitions, 1132 flow [2024-11-16 19:24:25,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 10.785714285714286) internal successors, (302), 28 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:25,590 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:25,590 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:25,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-16 19:24:25,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-16 19:24:25,791 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:25,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:25,791 INFO L85 PathProgramCache]: Analyzing trace with hash -576262898, now seen corresponding path program 9 times [2024-11-16 19:24:25,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:25,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835179236] [2024-11-16 19:24:25,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:25,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:26,565 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:26,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:26,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835179236] [2024-11-16 19:24:26,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835179236] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:24:26,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349169522] [2024-11-16 19:24:26,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:24:26,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:26,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:24:26,566 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:24:26,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-16 19:24:26,681 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-16 19:24:26,682 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:24:26,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-16 19:24:26,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:24:26,834 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:24:26,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-16 19:24:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:26,954 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:24:27,388 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-16 19:24:27,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-16 19:24:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:27,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349169522] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:24:27,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:24:27,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2024-11-16 19:24:27,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748454683] [2024-11-16 19:24:27,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:24:27,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-16 19:24:27,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:27,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-16 19:24:27,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2024-11-16 19:24:27,535 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:24:27,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 115 transitions, 1132 flow. Second operand has 28 states, 28 states have (on average 10.785714285714286) internal successors, (302), 28 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:27,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:27,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:24:27,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:28,321 INFO L124 PetriNetUnfolderBase]: 397/809 cut-off events. [2024-11-16 19:24:28,322 INFO L125 PetriNetUnfolderBase]: For 9597/9605 co-relation queries the response was YES. [2024-11-16 19:24:28,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4585 conditions, 809 events. 397/809 cut-off events. For 9597/9605 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4111 event pairs, 126 based on Foata normal form. 15/820 useless extension candidates. Maximal degree in co-relation 4543. Up to 542 conditions per place. [2024-11-16 19:24:28,331 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 103 selfloop transitions, 28 changer transitions 11/149 dead transitions. [2024-11-16 19:24:28,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 149 transitions, 1729 flow [2024-11-16 19:24:28,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-16 19:24:28,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-16 19:24:28,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 192 transitions. [2024-11-16 19:24:28,332 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40336134453781514 [2024-11-16 19:24:28,332 INFO L175 Difference]: Start difference. First operand has 128 places, 115 transitions, 1132 flow. Second operand 14 states and 192 transitions. [2024-11-16 19:24:28,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 149 transitions, 1729 flow [2024-11-16 19:24:28,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 149 transitions, 1646 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-11-16 19:24:28,355 INFO L231 Difference]: Finished difference. Result has 134 places, 121 transitions, 1232 flow [2024-11-16 19:24:28,355 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1232, PETRI_PLACES=134, PETRI_TRANSITIONS=121} [2024-11-16 19:24:28,355 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 104 predicate places. [2024-11-16 19:24:28,356 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 121 transitions, 1232 flow [2024-11-16 19:24:28,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 10.785714285714286) internal successors, (302), 28 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:28,356 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:28,356 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:28,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-16 19:24:28,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:28,557 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:28,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:28,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1369342876, now seen corresponding path program 10 times [2024-11-16 19:24:28,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:28,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953769066] [2024-11-16 19:24:28,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:28,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:29,296 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:29,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:29,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953769066] [2024-11-16 19:24:29,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953769066] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:24:29,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224350164] [2024-11-16 19:24:29,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 19:24:29,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:29,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:24:29,298 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:24:29,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-16 19:24:29,423 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 19:24:29,423 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:24:29,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-16 19:24:29,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:24:29,506 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:24:29,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-16 19:24:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:29,589 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:24:30,102 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-16 19:24:30,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 79 [2024-11-16 19:24:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:30,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224350164] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:24:30,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:24:30,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-11-16 19:24:30,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812457066] [2024-11-16 19:24:30,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:24:30,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-16 19:24:30,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:30,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-16 19:24:30,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2024-11-16 19:24:30,179 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:24:30,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 121 transitions, 1232 flow. Second operand has 28 states, 28 states have (on average 10.785714285714286) internal successors, (302), 28 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:30,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:30,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:24:30,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:31,413 INFO L124 PetriNetUnfolderBase]: 476/973 cut-off events. [2024-11-16 19:24:31,413 INFO L125 PetriNetUnfolderBase]: For 13472/13480 co-relation queries the response was YES. [2024-11-16 19:24:31,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5722 conditions, 973 events. 476/973 cut-off events. For 13472/13480 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5230 event pairs, 82 based on Foata normal form. 4/973 useless extension candidates. Maximal degree in co-relation 5679. Up to 314 conditions per place. [2024-11-16 19:24:31,423 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 110 selfloop transitions, 54 changer transitions 11/182 dead transitions. [2024-11-16 19:24:31,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 182 transitions, 2232 flow [2024-11-16 19:24:31,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-16 19:24:31,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-16 19:24:31,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 248 transitions. [2024-11-16 19:24:31,424 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40522875816993464 [2024-11-16 19:24:31,424 INFO L175 Difference]: Start difference. First operand has 134 places, 121 transitions, 1232 flow. Second operand 18 states and 248 transitions. [2024-11-16 19:24:31,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 182 transitions, 2232 flow [2024-11-16 19:24:31,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 182 transitions, 2135 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-11-16 19:24:31,449 INFO L231 Difference]: Finished difference. Result has 145 places, 135 transitions, 1554 flow [2024-11-16 19:24:31,449 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1141, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1554, PETRI_PLACES=145, PETRI_TRANSITIONS=135} [2024-11-16 19:24:31,449 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2024-11-16 19:24:31,449 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 135 transitions, 1554 flow [2024-11-16 19:24:31,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 10.785714285714286) internal successors, (302), 28 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:31,450 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:31,450 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:31,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-16 19:24:31,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:31,651 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:31,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:31,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1701304691, now seen corresponding path program 11 times [2024-11-16 19:24:31,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:31,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994178483] [2024-11-16 19:24:31,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:31,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:31,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:32,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:32,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994178483] [2024-11-16 19:24:32,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994178483] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:24:32,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864264039] [2024-11-16 19:24:32,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 19:24:32,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:32,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:24:32,276 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:24:32,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-16 19:24:32,476 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-16 19:24:32,476 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:24:32,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-16 19:24:32,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:24:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:32,648 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:24:32,802 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-16 19:24:32,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-16 19:24:32,824 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:32,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864264039] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:24:32,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:24:32,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-11-16 19:24:32,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300297121] [2024-11-16 19:24:32,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:24:32,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-16 19:24:32,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:32,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-16 19:24:32,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-11-16 19:24:32,834 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:24:32,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 135 transitions, 1554 flow. Second operand has 21 states, 21 states have (on average 11.619047619047619) internal successors, (244), 21 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:32,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:32,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:24:32,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:33,254 INFO L124 PetriNetUnfolderBase]: 487/998 cut-off events. [2024-11-16 19:24:33,254 INFO L125 PetriNetUnfolderBase]: For 14917/14925 co-relation queries the response was YES. [2024-11-16 19:24:33,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5967 conditions, 998 events. 487/998 cut-off events. For 14917/14925 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5432 event pairs, 67 based on Foata normal form. 15/1009 useless extension candidates. Maximal degree in co-relation 5921. Up to 357 conditions per place. [2024-11-16 19:24:33,266 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 120 selfloop transitions, 43 changer transitions 0/170 dead transitions. [2024-11-16 19:24:33,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 170 transitions, 2289 flow [2024-11-16 19:24:33,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 19:24:33,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-16 19:24:33,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-11-16 19:24:33,268 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4470588235294118 [2024-11-16 19:24:33,268 INFO L175 Difference]: Start difference. First operand has 145 places, 135 transitions, 1554 flow. Second operand 10 states and 152 transitions. [2024-11-16 19:24:33,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 170 transitions, 2289 flow [2024-11-16 19:24:33,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 170 transitions, 2074 flow, removed 78 selfloop flow, removed 10 redundant places. [2024-11-16 19:24:33,299 INFO L231 Difference]: Finished difference. Result has 145 places, 137 transitions, 1508 flow [2024-11-16 19:24:33,301 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1508, PETRI_PLACES=145, PETRI_TRANSITIONS=137} [2024-11-16 19:24:33,301 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2024-11-16 19:24:33,301 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 137 transitions, 1508 flow [2024-11-16 19:24:33,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 11.619047619047619) internal successors, (244), 21 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:33,302 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:33,302 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:33,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-16 19:24:33,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:33,506 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:33,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:33,506 INFO L85 PathProgramCache]: Analyzing trace with hash -2062603765, now seen corresponding path program 12 times [2024-11-16 19:24:33,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:33,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104254545] [2024-11-16 19:24:33,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:33,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:34,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:34,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104254545] [2024-11-16 19:24:34,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104254545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:24:34,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439506222] [2024-11-16 19:24:34,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 19:24:34,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:34,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:24:34,138 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:24:34,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-16 19:24:34,775 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-16 19:24:34,775 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:24:34,777 INFO L255 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-16 19:24:34,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:24:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:35,017 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:24:35,183 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-16 19:24:35,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-16 19:24:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:35,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439506222] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:24:35,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:24:35,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-11-16 19:24:35,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113596711] [2024-11-16 19:24:35,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:24:35,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-16 19:24:35,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:35,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-16 19:24:35,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-11-16 19:24:35,244 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:24:35,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 137 transitions, 1508 flow. Second operand has 19 states, 19 states have (on average 11.421052631578947) internal successors, (217), 19 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:35,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:35,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:24:35,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:35,753 INFO L124 PetriNetUnfolderBase]: 527/1077 cut-off events. [2024-11-16 19:24:35,754 INFO L125 PetriNetUnfolderBase]: For 13995/14003 co-relation queries the response was YES. [2024-11-16 19:24:35,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6218 conditions, 1077 events. 527/1077 cut-off events. For 13995/14003 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6059 event pairs, 63 based on Foata normal form. 15/1081 useless extension candidates. Maximal degree in co-relation 6172. Up to 374 conditions per place. [2024-11-16 19:24:35,764 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 124 selfloop transitions, 51 changer transitions 0/182 dead transitions. [2024-11-16 19:24:35,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 182 transitions, 2335 flow [2024-11-16 19:24:35,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-16 19:24:35,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-16 19:24:35,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 182 transitions. [2024-11-16 19:24:35,765 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44607843137254904 [2024-11-16 19:24:35,765 INFO L175 Difference]: Start difference. First operand has 145 places, 137 transitions, 1508 flow. Second operand 12 states and 182 transitions. [2024-11-16 19:24:35,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 182 transitions, 2335 flow [2024-11-16 19:24:35,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 182 transitions, 2242 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-11-16 19:24:35,787 INFO L231 Difference]: Finished difference. Result has 153 places, 142 transitions, 1633 flow [2024-11-16 19:24:35,787 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1431, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1633, PETRI_PLACES=153, PETRI_TRANSITIONS=142} [2024-11-16 19:24:35,787 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 123 predicate places. [2024-11-16 19:24:35,787 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 142 transitions, 1633 flow [2024-11-16 19:24:35,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.421052631578947) internal successors, (217), 19 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:35,787 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:35,788 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:35,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-16 19:24:35,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-16 19:24:35,988 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:35,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:35,989 INFO L85 PathProgramCache]: Analyzing trace with hash 9999257, now seen corresponding path program 13 times [2024-11-16 19:24:35,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:35,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673272810] [2024-11-16 19:24:35,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:35,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:36,618 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:36,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:36,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673272810] [2024-11-16 19:24:36,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673272810] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:24:36,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977835414] [2024-11-16 19:24:36,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 19:24:36,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:36,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:24:36,621 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:24:36,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-16 19:24:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:36,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-16 19:24:36,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:24:36,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:24:36,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-11-16 19:24:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:36,939 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:24:37,079 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-16 19:24:37,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-16 19:24:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:37,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977835414] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:24:37,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:24:37,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-11-16 19:24:37,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158127147] [2024-11-16 19:24:37,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:24:37,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-16 19:24:37,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:37,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-16 19:24:37,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-16 19:24:37,109 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:24:37,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 142 transitions, 1633 flow. Second operand has 18 states, 18 states have (on average 11.277777777777779) internal successors, (203), 18 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:37,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:37,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:24:37,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:37,644 INFO L124 PetriNetUnfolderBase]: 551/1133 cut-off events. [2024-11-16 19:24:37,644 INFO L125 PetriNetUnfolderBase]: For 15486/15494 co-relation queries the response was YES. [2024-11-16 19:24:37,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6744 conditions, 1133 events. 551/1133 cut-off events. For 15486/15494 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6489 event pairs, 51 based on Foata normal form. 19/1141 useless extension candidates. Maximal degree in co-relation 6695. Up to 351 conditions per place. [2024-11-16 19:24:37,655 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 121 selfloop transitions, 59 changer transitions 0/187 dead transitions. [2024-11-16 19:24:37,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 187 transitions, 2474 flow [2024-11-16 19:24:37,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-16 19:24:37,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-16 19:24:37,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 197 transitions. [2024-11-16 19:24:37,657 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4457013574660634 [2024-11-16 19:24:37,657 INFO L175 Difference]: Start difference. First operand has 153 places, 142 transitions, 1633 flow. Second operand 13 states and 197 transitions. [2024-11-16 19:24:37,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 187 transitions, 2474 flow [2024-11-16 19:24:37,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 187 transitions, 2361 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-11-16 19:24:37,695 INFO L231 Difference]: Finished difference. Result has 158 places, 144 transitions, 1744 flow [2024-11-16 19:24:37,695 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1744, PETRI_PLACES=158, PETRI_TRANSITIONS=144} [2024-11-16 19:24:37,696 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 128 predicate places. [2024-11-16 19:24:37,696 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 144 transitions, 1744 flow [2024-11-16 19:24:37,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.277777777777779) internal successors, (203), 18 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:37,696 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:37,697 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:37,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-16 19:24:37,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:37,897 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:37,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:37,898 INFO L85 PathProgramCache]: Analyzing trace with hash 854424597, now seen corresponding path program 14 times [2024-11-16 19:24:37,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:37,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142633907] [2024-11-16 19:24:37,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:37,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:38,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:38,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142633907] [2024-11-16 19:24:38,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142633907] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:24:38,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329220736] [2024-11-16 19:24:38,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:24:38,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:38,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:24:38,508 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:24:38,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-16 19:24:38,662 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:24:38,663 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:24:38,665 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-16 19:24:38,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:24:38,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:24:38,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-11-16 19:24:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:38,935 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:24:39,072 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-16 19:24:39,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-16 19:24:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:39,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329220736] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:24:39,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:24:39,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-11-16 19:24:39,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807555339] [2024-11-16 19:24:39,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:24:39,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-16 19:24:39,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:39,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-16 19:24:39,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-11-16 19:24:39,176 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:24:39,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 144 transitions, 1744 flow. Second operand has 20 states, 20 states have (on average 11.3) internal successors, (226), 20 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:39,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:39,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:24:39,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:39,780 INFO L124 PetriNetUnfolderBase]: 601/1235 cut-off events. [2024-11-16 19:24:39,780 INFO L125 PetriNetUnfolderBase]: For 18298/18306 co-relation queries the response was YES. [2024-11-16 19:24:39,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7555 conditions, 1235 events. 601/1235 cut-off events. For 18298/18306 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7097 event pairs, 235 based on Foata normal form. 15/1244 useless extension candidates. Maximal degree in co-relation 7505. Up to 824 conditions per place. [2024-11-16 19:24:39,790 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 150 selfloop transitions, 36 changer transitions 0/193 dead transitions. [2024-11-16 19:24:39,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 193 transitions, 2546 flow [2024-11-16 19:24:39,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-16 19:24:39,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-16 19:24:39,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 210 transitions. [2024-11-16 19:24:39,792 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4411764705882353 [2024-11-16 19:24:39,792 INFO L175 Difference]: Start difference. First operand has 158 places, 144 transitions, 1744 flow. Second operand 14 states and 210 transitions. [2024-11-16 19:24:39,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 193 transitions, 2546 flow [2024-11-16 19:24:39,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 193 transitions, 2404 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-11-16 19:24:39,832 INFO L231 Difference]: Finished difference. Result has 163 places, 147 transitions, 1805 flow [2024-11-16 19:24:39,832 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1583, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1805, PETRI_PLACES=163, PETRI_TRANSITIONS=147} [2024-11-16 19:24:39,832 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2024-11-16 19:24:39,833 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 147 transitions, 1805 flow [2024-11-16 19:24:39,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.3) internal successors, (226), 20 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:39,833 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:39,833 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:39,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-16 19:24:40,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:40,037 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:40,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:40,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1639802991, now seen corresponding path program 15 times [2024-11-16 19:24:40,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:40,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990225704] [2024-11-16 19:24:40,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:40,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:40,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:40,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990225704] [2024-11-16 19:24:40,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990225704] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:24:40,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48389424] [2024-11-16 19:24:40,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:24:40,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:40,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:24:40,638 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:24:40,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-16 19:24:40,803 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-16 19:24:40,803 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:24:40,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-16 19:24:40,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:24:41,067 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:24:41,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-11-16 19:24:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:41,162 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:24:41,358 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-16 19:24:41,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-16 19:24:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:41,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48389424] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:24:41,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:24:41,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 22 [2024-11-16 19:24:41,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273943061] [2024-11-16 19:24:41,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:24:41,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-16 19:24:41,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:41,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-16 19:24:41,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2024-11-16 19:24:41,465 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:24:41,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 147 transitions, 1805 flow. Second operand has 22 states, 22 states have (on average 11.181818181818182) internal successors, (246), 22 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:41,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:41,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:24:41,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:42,344 INFO L124 PetriNetUnfolderBase]: 684/1445 cut-off events. [2024-11-16 19:24:42,344 INFO L125 PetriNetUnfolderBase]: For 24215/24223 co-relation queries the response was YES. [2024-11-16 19:24:42,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8754 conditions, 1445 events. 684/1445 cut-off events. For 24215/24223 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8755 event pairs, 282 based on Foata normal form. 27/1466 useless extension candidates. Maximal degree in co-relation 8700. Up to 935 conditions per place. [2024-11-16 19:24:42,354 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 156 selfloop transitions, 45 changer transitions 0/208 dead transitions. [2024-11-16 19:24:42,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 208 transitions, 2841 flow [2024-11-16 19:24:42,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-16 19:24:42,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-16 19:24:42,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 256 transitions. [2024-11-16 19:24:42,355 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4429065743944637 [2024-11-16 19:24:42,355 INFO L175 Difference]: Start difference. First operand has 163 places, 147 transitions, 1805 flow. Second operand 17 states and 256 transitions. [2024-11-16 19:24:42,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 208 transitions, 2841 flow [2024-11-16 19:24:42,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 208 transitions, 2694 flow, removed 47 selfloop flow, removed 9 redundant places. [2024-11-16 19:24:42,385 INFO L231 Difference]: Finished difference. Result has 177 places, 157 transitions, 2010 flow [2024-11-16 19:24:42,386 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1659, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2010, PETRI_PLACES=177, PETRI_TRANSITIONS=157} [2024-11-16 19:24:42,386 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 147 predicate places. [2024-11-16 19:24:42,386 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 157 transitions, 2010 flow [2024-11-16 19:24:42,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 11.181818181818182) internal successors, (246), 22 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:42,386 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:42,386 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:42,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-16 19:24:42,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:42,587 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:42,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:42,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1063896367, now seen corresponding path program 16 times [2024-11-16 19:24:42,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:42,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726690936] [2024-11-16 19:24:42,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:42,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:43,581 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-16 19:24:43,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:43,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726690936] [2024-11-16 19:24:43,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726690936] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:24:43,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642743456] [2024-11-16 19:24:43,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 19:24:43,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:43,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:24:43,583 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:24:43,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-16 19:24:43,727 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 19:24:43,728 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:24:43,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-16 19:24:43,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:24:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:43,823 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:24:43,956 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-16 19:24:43,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-16 19:24:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:44,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642743456] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:24:44,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:24:44,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 25 [2024-11-16 19:24:44,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473018822] [2024-11-16 19:24:44,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:24:44,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-16 19:24:44,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:44,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-16 19:24:44,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-11-16 19:24:44,026 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-16 19:24:44,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 157 transitions, 2010 flow. Second operand has 25 states, 25 states have (on average 9.16) internal successors, (229), 25 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:44,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:44,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-16 19:24:44,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:44,502 INFO L124 PetriNetUnfolderBase]: 648/1352 cut-off events. [2024-11-16 19:24:44,502 INFO L125 PetriNetUnfolderBase]: For 21659/21667 co-relation queries the response was YES. [2024-11-16 19:24:44,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8478 conditions, 1352 events. 648/1352 cut-off events. For 21659/21667 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8038 event pairs, 306 based on Foata normal form. 15/1362 useless extension candidates. Maximal degree in co-relation 8419. Up to 1030 conditions per place. [2024-11-16 19:24:44,514 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 129 selfloop transitions, 39 changer transitions 0/173 dead transitions. [2024-11-16 19:24:44,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 173 transitions, 2511 flow [2024-11-16 19:24:44,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-16 19:24:44,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-16 19:24:44,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 157 transitions. [2024-11-16 19:24:44,516 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32983193277310924 [2024-11-16 19:24:44,516 INFO L175 Difference]: Start difference. First operand has 177 places, 157 transitions, 2010 flow. Second operand 14 states and 157 transitions. [2024-11-16 19:24:44,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 173 transitions, 2511 flow [2024-11-16 19:24:44,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 173 transitions, 2353 flow, removed 66 selfloop flow, removed 9 redundant places. [2024-11-16 19:24:44,571 INFO L231 Difference]: Finished difference. Result has 179 places, 155 transitions, 1925 flow [2024-11-16 19:24:44,572 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1827, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1925, PETRI_PLACES=179, PETRI_TRANSITIONS=155} [2024-11-16 19:24:44,572 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 149 predicate places. [2024-11-16 19:24:44,572 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 155 transitions, 1925 flow [2024-11-16 19:24:44,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.16) internal successors, (229), 25 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:44,573 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:44,573 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:44,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-16 19:24:44,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-16 19:24:44,773 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:44,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:44,774 INFO L85 PathProgramCache]: Analyzing trace with hash 206545829, now seen corresponding path program 17 times [2024-11-16 19:24:44,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:44,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290076910] [2024-11-16 19:24:44,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:44,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:45,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:45,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290076910] [2024-11-16 19:24:45,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290076910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:24:45,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608837944] [2024-11-16 19:24:45,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 19:24:45,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:45,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:24:45,337 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:24:45,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-16 19:24:45,585 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-16 19:24:45,585 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:24:45,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-16 19:24:45,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:24:45,768 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:24:45,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-11-16 19:24:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:45,840 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:24:45,965 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-16 19:24:45,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-16 19:24:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:46,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608837944] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:24:46,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:24:46,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-11-16 19:24:46,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632481160] [2024-11-16 19:24:46,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:24:46,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-16 19:24:46,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:46,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-16 19:24:46,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-11-16 19:24:46,070 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:24:46,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 155 transitions, 1925 flow. Second operand has 20 states, 20 states have (on average 11.2) internal successors, (224), 20 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:46,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:46,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:24:46,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:46,613 INFO L124 PetriNetUnfolderBase]: 644/1344 cut-off events. [2024-11-16 19:24:46,613 INFO L125 PetriNetUnfolderBase]: For 19039/19047 co-relation queries the response was YES. [2024-11-16 19:24:46,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8191 conditions, 1344 events. 644/1344 cut-off events. For 19039/19047 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8025 event pairs, 270 based on Foata normal form. 12/1344 useless extension candidates. Maximal degree in co-relation 8133. Up to 949 conditions per place. [2024-11-16 19:24:46,626 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 132 selfloop transitions, 35 changer transitions 3/177 dead transitions. [2024-11-16 19:24:46,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 177 transitions, 2437 flow [2024-11-16 19:24:46,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-16 19:24:46,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-16 19:24:46,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 169 transitions. [2024-11-16 19:24:46,628 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41421568627450983 [2024-11-16 19:24:46,628 INFO L175 Difference]: Start difference. First operand has 179 places, 155 transitions, 1925 flow. Second operand 12 states and 169 transitions. [2024-11-16 19:24:46,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 177 transitions, 2437 flow [2024-11-16 19:24:46,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 177 transitions, 2360 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-11-16 19:24:46,683 INFO L231 Difference]: Finished difference. Result has 178 places, 151 transitions, 1874 flow [2024-11-16 19:24:46,683 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1874, PETRI_PLACES=178, PETRI_TRANSITIONS=151} [2024-11-16 19:24:46,683 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 148 predicate places. [2024-11-16 19:24:46,683 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 151 transitions, 1874 flow [2024-11-16 19:24:46,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.2) internal successors, (224), 20 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:46,684 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:46,684 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:46,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-16 19:24:46,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-16 19:24:46,889 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:46,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:46,889 INFO L85 PathProgramCache]: Analyzing trace with hash 368623027, now seen corresponding path program 18 times [2024-11-16 19:24:46,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:46,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328314726] [2024-11-16 19:24:46,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:46,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:47,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:47,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328314726] [2024-11-16 19:24:47,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328314726] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:24:47,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70285936] [2024-11-16 19:24:47,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 19:24:47,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:47,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:24:47,452 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:24:47,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-16 19:24:47,605 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-16 19:24:47,605 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:24:47,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-16 19:24:47,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:24:47,854 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:47,855 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:24:47,995 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-16 19:24:47,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-16 19:24:48,073 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:48,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70285936] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:24:48,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:24:48,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 21 [2024-11-16 19:24:48,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521716641] [2024-11-16 19:24:48,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:24:48,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-16 19:24:48,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:48,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-16 19:24:48,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-11-16 19:24:48,084 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:24:48,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 151 transitions, 1874 flow. Second operand has 21 states, 21 states have (on average 11.19047619047619) internal successors, (235), 21 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:48,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:48,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:24:48,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:48,550 INFO L124 PetriNetUnfolderBase]: 610/1268 cut-off events. [2024-11-16 19:24:48,550 INFO L125 PetriNetUnfolderBase]: For 18716/18724 co-relation queries the response was YES. [2024-11-16 19:24:48,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7832 conditions, 1268 events. 610/1268 cut-off events. For 18716/18724 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7473 event pairs, 280 based on Foata normal form. 14/1272 useless extension candidates. Maximal degree in co-relation 7774. Up to 964 conditions per place. [2024-11-16 19:24:48,562 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 123 selfloop transitions, 26 changer transitions 7/163 dead transitions. [2024-11-16 19:24:48,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 163 transitions, 2274 flow [2024-11-16 19:24:48,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 19:24:48,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-16 19:24:48,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-11-16 19:24:48,564 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40294117647058825 [2024-11-16 19:24:48,564 INFO L175 Difference]: Start difference. First operand has 178 places, 151 transitions, 1874 flow. Second operand 10 states and 137 transitions. [2024-11-16 19:24:48,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 163 transitions, 2274 flow [2024-11-16 19:24:48,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 163 transitions, 2175 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-11-16 19:24:48,614 INFO L231 Difference]: Finished difference. Result has 172 places, 143 transitions, 1729 flow [2024-11-16 19:24:48,615 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1725, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1729, PETRI_PLACES=172, PETRI_TRANSITIONS=143} [2024-11-16 19:24:48,615 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2024-11-16 19:24:48,615 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 143 transitions, 1729 flow [2024-11-16 19:24:48,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 11.19047619047619) internal successors, (235), 21 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:48,616 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:48,616 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:48,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-16 19:24:48,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-16 19:24:48,817 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:48,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:48,817 INFO L85 PathProgramCache]: Analyzing trace with hash 997872655, now seen corresponding path program 19 times [2024-11-16 19:24:48,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:48,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19871483] [2024-11-16 19:24:48,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:48,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:48,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:49,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:49,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19871483] [2024-11-16 19:24:49,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19871483] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:24:49,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162255] [2024-11-16 19:24:49,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 19:24:49,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:49,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:24:49,478 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:24:49,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-16 19:24:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:49,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-16 19:24:49,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:24:49,808 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:24:49,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-11-16 19:24:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:49,876 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:24:50,041 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-11-16 19:24:50,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-11-16 19:24:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:50,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162255] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:24:50,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:24:50,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-11-16 19:24:50,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537917297] [2024-11-16 19:24:50,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:24:50,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-16 19:24:50,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:50,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-16 19:24:50,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-16 19:24:50,101 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:24:50,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 143 transitions, 1729 flow. Second operand has 18 states, 18 states have (on average 11.333333333333334) internal successors, (204), 18 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:50,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:50,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:24:50,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:50,543 INFO L124 PetriNetUnfolderBase]: 629/1309 cut-off events. [2024-11-16 19:24:50,543 INFO L125 PetriNetUnfolderBase]: For 19784/19792 co-relation queries the response was YES. [2024-11-16 19:24:50,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8015 conditions, 1309 events. 629/1309 cut-off events. For 19784/19792 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7725 event pairs, 204 based on Foata normal form. 14/1319 useless extension candidates. Maximal degree in co-relation 7958. Up to 642 conditions per place. [2024-11-16 19:24:50,554 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 126 selfloop transitions, 41 changer transitions 0/174 dead transitions. [2024-11-16 19:24:50,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 174 transitions, 2371 flow [2024-11-16 19:24:50,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 19:24:50,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-16 19:24:50,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-11-16 19:24:50,556 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-11-16 19:24:50,556 INFO L175 Difference]: Start difference. First operand has 172 places, 143 transitions, 1729 flow. Second operand 9 states and 144 transitions. [2024-11-16 19:24:50,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 174 transitions, 2371 flow [2024-11-16 19:24:50,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 174 transitions, 2283 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-11-16 19:24:50,627 INFO L231 Difference]: Finished difference. Result has 165 places, 144 transitions, 1752 flow [2024-11-16 19:24:50,627 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1647, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1752, PETRI_PLACES=165, PETRI_TRANSITIONS=144} [2024-11-16 19:24:50,628 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 135 predicate places. [2024-11-16 19:24:50,628 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 144 transitions, 1752 flow [2024-11-16 19:24:50,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.333333333333334) internal successors, (204), 18 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:50,628 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:50,628 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:50,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-16 19:24:50,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:50,829 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:50,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:50,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1201533991, now seen corresponding path program 20 times [2024-11-16 19:24:50,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:50,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928706973] [2024-11-16 19:24:50,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:50,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:51,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:51,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928706973] [2024-11-16 19:24:51,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928706973] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:24:51,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789664151] [2024-11-16 19:24:51,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:24:51,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:51,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:24:51,417 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:24:51,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-16 19:24:51,578 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:24:51,578 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:24:51,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-16 19:24:51,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:24:51,920 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:51,920 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:24:52,062 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-11-16 19:24:52,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-11-16 19:24:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:52,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789664151] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:24:52,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:24:52,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 21 [2024-11-16 19:24:52,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177703480] [2024-11-16 19:24:52,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:24:52,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-16 19:24:52,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:52,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-16 19:24:52,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-11-16 19:24:52,154 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:24:52,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 144 transitions, 1752 flow. Second operand has 21 states, 21 states have (on average 11.285714285714286) internal successors, (237), 21 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:52,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:52,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:24:52,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:52,670 INFO L124 PetriNetUnfolderBase]: 634/1327 cut-off events. [2024-11-16 19:24:52,671 INFO L125 PetriNetUnfolderBase]: For 19302/19310 co-relation queries the response was YES. [2024-11-16 19:24:52,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8043 conditions, 1327 events. 634/1327 cut-off events. For 19302/19310 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 7905 event pairs, 206 based on Foata normal form. 13/1338 useless extension candidates. Maximal degree in co-relation 7987. Up to 642 conditions per place. [2024-11-16 19:24:52,686 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 117 selfloop transitions, 42 changer transitions 12/178 dead transitions. [2024-11-16 19:24:52,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 178 transitions, 2431 flow [2024-11-16 19:24:52,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 19:24:52,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-16 19:24:52,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-11-16 19:24:52,688 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4477124183006536 [2024-11-16 19:24:52,688 INFO L175 Difference]: Start difference. First operand has 165 places, 144 transitions, 1752 flow. Second operand 9 states and 137 transitions. [2024-11-16 19:24:52,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 178 transitions, 2431 flow [2024-11-16 19:24:52,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 178 transitions, 2372 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-16 19:24:52,721 INFO L231 Difference]: Finished difference. Result has 169 places, 143 transitions, 1770 flow [2024-11-16 19:24:52,721 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1695, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1770, PETRI_PLACES=169, PETRI_TRANSITIONS=143} [2024-11-16 19:24:52,722 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 139 predicate places. [2024-11-16 19:24:52,722 INFO L471 AbstractCegarLoop]: Abstraction has has 169 places, 143 transitions, 1770 flow [2024-11-16 19:24:52,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 11.285714285714286) internal successors, (237), 21 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:52,722 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:52,722 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:52,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-16 19:24:52,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:52,923 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:52,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:52,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1216925205, now seen corresponding path program 21 times [2024-11-16 19:24:52,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:52,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278392328] [2024-11-16 19:24:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:52,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:53,614 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:53,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:53,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278392328] [2024-11-16 19:24:53,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278392328] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:24:53,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619818571] [2024-11-16 19:24:53,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:24:53,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:53,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:24:53,616 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:24:53,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-16 19:24:53,766 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-16 19:24:53,766 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:24:53,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-16 19:24:53,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:24:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:54,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:24:54,173 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-11-16 19:24:54,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-11-16 19:24:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:54,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619818571] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:24:54,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:24:54,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 21 [2024-11-16 19:24:54,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156872113] [2024-11-16 19:24:54,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:24:54,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-16 19:24:54,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:54,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-16 19:24:54,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-11-16 19:24:54,233 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:24:54,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 143 transitions, 1770 flow. Second operand has 21 states, 21 states have (on average 11.19047619047619) internal successors, (235), 21 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:54,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:54,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:24:54,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:54,907 INFO L124 PetriNetUnfolderBase]: 624/1304 cut-off events. [2024-11-16 19:24:54,908 INFO L125 PetriNetUnfolderBase]: For 19566/19574 co-relation queries the response was YES. [2024-11-16 19:24:54,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8010 conditions, 1304 events. 624/1304 cut-off events. For 19566/19574 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7725 event pairs, 202 based on Foata normal form. 13/1313 useless extension candidates. Maximal degree in co-relation 7952. Up to 642 conditions per place. [2024-11-16 19:24:54,918 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 114 selfloop transitions, 45 changer transitions 12/178 dead transitions. [2024-11-16 19:24:54,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 178 transitions, 2439 flow [2024-11-16 19:24:54,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-16 19:24:54,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-16 19:24:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 161 transitions. [2024-11-16 19:24:54,920 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4304812834224599 [2024-11-16 19:24:54,920 INFO L175 Difference]: Start difference. First operand has 169 places, 143 transitions, 1770 flow. Second operand 11 states and 161 transitions. [2024-11-16 19:24:54,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 178 transitions, 2439 flow [2024-11-16 19:24:54,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 178 transitions, 2358 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-11-16 19:24:54,966 INFO L231 Difference]: Finished difference. Result has 171 places, 141 transitions, 1763 flow [2024-11-16 19:24:54,966 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1763, PETRI_PLACES=171, PETRI_TRANSITIONS=141} [2024-11-16 19:24:54,966 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 141 predicate places. [2024-11-16 19:24:54,966 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 141 transitions, 1763 flow [2024-11-16 19:24:54,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 11.19047619047619) internal successors, (235), 21 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:54,966 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:54,967 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:54,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-16 19:24:55,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-16 19:24:55,167 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:55,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:55,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1791680843, now seen corresponding path program 22 times [2024-11-16 19:24:55,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:55,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140221947] [2024-11-16 19:24:55,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:55,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:55,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:55,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:55,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140221947] [2024-11-16 19:24:55,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140221947] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:24:55,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577618893] [2024-11-16 19:24:55,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 19:24:55,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:55,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:24:55,897 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:24:55,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-16 19:24:56,053 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 19:24:56,053 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:24:56,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-16 19:24:56,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:24:56,160 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:24:56,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-11-16 19:24:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:56,246 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:24:56,498 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-11-16 19:24:56,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-11-16 19:24:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:56,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577618893] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:24:56,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:24:56,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 24 [2024-11-16 19:24:56,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544394306] [2024-11-16 19:24:56,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:24:56,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-16 19:24:56,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:56,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-16 19:24:56,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2024-11-16 19:24:56,537 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:24:56,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 141 transitions, 1763 flow. Second operand has 24 states, 24 states have (on average 11.041666666666666) internal successors, (265), 24 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:56,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:56,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:24:56,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:57,182 INFO L124 PetriNetUnfolderBase]: 599/1253 cut-off events. [2024-11-16 19:24:57,182 INFO L125 PetriNetUnfolderBase]: For 18602/18610 co-relation queries the response was YES. [2024-11-16 19:24:57,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7746 conditions, 1253 events. 599/1253 cut-off events. For 18602/18610 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7267 event pairs, 103 based on Foata normal form. 13/1264 useless extension candidates. Maximal degree in co-relation 7689. Up to 632 conditions per place. [2024-11-16 19:24:57,192 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 118 selfloop transitions, 42 changer transitions 4/171 dead transitions. [2024-11-16 19:24:57,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 171 transitions, 2371 flow [2024-11-16 19:24:57,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-16 19:24:57,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-16 19:24:57,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 176 transitions. [2024-11-16 19:24:57,193 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43137254901960786 [2024-11-16 19:24:57,193 INFO L175 Difference]: Start difference. First operand has 171 places, 141 transitions, 1763 flow. Second operand 12 states and 176 transitions. [2024-11-16 19:24:57,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 171 transitions, 2371 flow [2024-11-16 19:24:57,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 171 transitions, 2287 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-16 19:24:57,224 INFO L231 Difference]: Finished difference. Result has 173 places, 140 transitions, 1767 flow [2024-11-16 19:24:57,224 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1767, PETRI_PLACES=173, PETRI_TRANSITIONS=140} [2024-11-16 19:24:57,224 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 143 predicate places. [2024-11-16 19:24:57,224 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 140 transitions, 1767 flow [2024-11-16 19:24:57,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 11.041666666666666) internal successors, (265), 24 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:57,225 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:24:57,225 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:24:57,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-16 19:24:57,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-16 19:24:57,425 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:24:57,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:24:57,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1919456027, now seen corresponding path program 23 times [2024-11-16 19:24:57,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:24:57,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969003521] [2024-11-16 19:24:57,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:24:57,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:24:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:24:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-16 19:24:58,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:24:58,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969003521] [2024-11-16 19:24:58,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969003521] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:24:58,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45059540] [2024-11-16 19:24:58,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 19:24:58,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:24:58,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:24:58,605 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:24:58,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-16 19:24:58,829 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-16 19:24:58,829 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:24:58,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-16 19:24:58,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:24:58,964 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:24:58,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-11-16 19:24:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:59,033 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:24:59,203 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-16 19:24:59,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-16 19:24:59,277 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:24:59,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45059540] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:24:59,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:24:59,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 7] total 29 [2024-11-16 19:24:59,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400745268] [2024-11-16 19:24:59,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:24:59,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-16 19:24:59,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:24:59,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-16 19:24:59,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2024-11-16 19:24:59,313 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-16 19:24:59,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 140 transitions, 1767 flow. Second operand has 29 states, 29 states have (on average 9.206896551724139) internal successors, (267), 29 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:24:59,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:24:59,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-16 19:24:59,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:24:59,966 INFO L124 PetriNetUnfolderBase]: 621/1290 cut-off events. [2024-11-16 19:24:59,967 INFO L125 PetriNetUnfolderBase]: For 20013/20021 co-relation queries the response was YES. [2024-11-16 19:24:59,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8100 conditions, 1290 events. 621/1290 cut-off events. For 20013/20021 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7526 event pairs, 287 based on Foata normal form. 14/1302 useless extension candidates. Maximal degree in co-relation 8042. Up to 966 conditions per place. [2024-11-16 19:24:59,976 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 115 selfloop transitions, 39 changer transitions 0/159 dead transitions. [2024-11-16 19:24:59,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 159 transitions, 2274 flow [2024-11-16 19:24:59,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-16 19:24:59,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-16 19:24:59,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 160 transitions. [2024-11-16 19:24:59,977 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33613445378151263 [2024-11-16 19:24:59,977 INFO L175 Difference]: Start difference. First operand has 173 places, 140 transitions, 1767 flow. Second operand 14 states and 160 transitions. [2024-11-16 19:24:59,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 159 transitions, 2274 flow [2024-11-16 19:25:00,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 159 transitions, 2184 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-11-16 19:25:00,008 INFO L231 Difference]: Finished difference. Result has 176 places, 141 transitions, 1792 flow [2024-11-16 19:25:00,009 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1792, PETRI_PLACES=176, PETRI_TRANSITIONS=141} [2024-11-16 19:25:00,009 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 146 predicate places. [2024-11-16 19:25:00,009 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 141 transitions, 1792 flow [2024-11-16 19:25:00,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 9.206896551724139) internal successors, (267), 29 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:25:00,009 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:25:00,009 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:25:00,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-16 19:25:00,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:25:00,210 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:25:00,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:25:00,210 INFO L85 PathProgramCache]: Analyzing trace with hash 77188817, now seen corresponding path program 24 times [2024-11-16 19:25:00,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:25:00,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952135237] [2024-11-16 19:25:00,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:25:00,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:25:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:25:00,715 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:25:00,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:25:00,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952135237] [2024-11-16 19:25:00,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952135237] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:25:00,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161034838] [2024-11-16 19:25:00,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 19:25:00,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:25:00,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:25:00,718 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:25:00,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-16 19:25:00,918 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-16 19:25:00,918 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:25:00,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-16 19:25:00,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:25:01,170 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-16 19:25:01,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-11-16 19:25:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:25:01,177 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:25:01,304 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-16 19:25:01,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-16 19:25:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:25:01,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161034838] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:25:01,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:25:01,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-11-16 19:25:01,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572159458] [2024-11-16 19:25:01,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:25:01,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-16 19:25:01,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:25:01,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-16 19:25:01,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-11-16 19:25:01,393 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:25:01,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 141 transitions, 1792 flow. Second operand has 19 states, 19 states have (on average 11.157894736842104) internal successors, (212), 19 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:25:01,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:25:01,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:25:01,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:25:01,746 INFO L124 PetriNetUnfolderBase]: 630/1315 cut-off events. [2024-11-16 19:25:01,746 INFO L125 PetriNetUnfolderBase]: For 19457/19465 co-relation queries the response was YES. [2024-11-16 19:25:01,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8197 conditions, 1315 events. 630/1315 cut-off events. For 19457/19465 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 7786 event pairs, 295 based on Foata normal form. 14/1327 useless extension candidates. Maximal degree in co-relation 8139. Up to 1021 conditions per place. [2024-11-16 19:25:01,757 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 128 selfloop transitions, 23 changer transitions 0/158 dead transitions. [2024-11-16 19:25:01,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 158 transitions, 2309 flow [2024-11-16 19:25:01,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 19:25:01,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-16 19:25:01,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2024-11-16 19:25:01,758 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2024-11-16 19:25:01,758 INFO L175 Difference]: Start difference. First operand has 176 places, 141 transitions, 1792 flow. Second operand 9 states and 126 transitions. [2024-11-16 19:25:01,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 158 transitions, 2309 flow [2024-11-16 19:25:01,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 158 transitions, 2231 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-11-16 19:25:01,787 INFO L231 Difference]: Finished difference. Result has 173 places, 142 transitions, 1789 flow [2024-11-16 19:25:01,787 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1714, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1789, PETRI_PLACES=173, PETRI_TRANSITIONS=142} [2024-11-16 19:25:01,788 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 143 predicate places. [2024-11-16 19:25:01,788 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 142 transitions, 1789 flow [2024-11-16 19:25:01,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.157894736842104) internal successors, (212), 19 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:25:01,788 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:25:01,788 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:25:01,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-16 19:25:01,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:25:01,989 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:25:01,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:25:01,989 INFO L85 PathProgramCache]: Analyzing trace with hash -878651829, now seen corresponding path program 25 times [2024-11-16 19:25:01,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:25:01,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78913500] [2024-11-16 19:25:01,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:25:01,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:25:02,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:25:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:25:02,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:25:02,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78913500] [2024-11-16 19:25:02,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78913500] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:25:02,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337073168] [2024-11-16 19:25:02,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 19:25:02,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:25:02,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:25:02,587 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:25:02,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-16 19:25:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:25:02,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-16 19:25:02,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:25:02,911 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:25:02,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-11-16 19:25:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:25:02,986 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:25:03,134 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-16 19:25:03,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-16 19:25:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:25:03,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337073168] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:25:03,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:25:03,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-11-16 19:25:03,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559081393] [2024-11-16 19:25:03,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:25:03,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-16 19:25:03,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:25:03,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-16 19:25:03,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-11-16 19:25:03,249 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:25:03,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 142 transitions, 1789 flow. Second operand has 19 states, 19 states have (on average 11.210526315789474) internal successors, (213), 19 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:25:03,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:25:03,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:25:03,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:25:03,835 INFO L124 PetriNetUnfolderBase]: 610/1267 cut-off events. [2024-11-16 19:25:03,835 INFO L125 PetriNetUnfolderBase]: For 18685/18693 co-relation queries the response was YES. [2024-11-16 19:25:03,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7947 conditions, 1267 events. 610/1267 cut-off events. For 18685/18693 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7393 event pairs, 284 based on Foata normal form. 13/1274 useless extension candidates. Maximal degree in co-relation 7888. Up to 981 conditions per place. [2024-11-16 19:25:03,850 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 118 selfloop transitions, 26 changer transitions 4/155 dead transitions. [2024-11-16 19:25:03,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 155 transitions, 2210 flow [2024-11-16 19:25:03,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 19:25:03,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-16 19:25:03,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-11-16 19:25:03,852 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40294117647058825 [2024-11-16 19:25:03,852 INFO L175 Difference]: Start difference. First operand has 173 places, 142 transitions, 1789 flow. Second operand 10 states and 137 transitions. [2024-11-16 19:25:03,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 155 transitions, 2210 flow [2024-11-16 19:25:03,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 155 transitions, 2159 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-16 19:25:03,895 INFO L231 Difference]: Finished difference. Result has 175 places, 138 transitions, 1749 flow [2024-11-16 19:25:03,895 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1713, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1749, PETRI_PLACES=175, PETRI_TRANSITIONS=138} [2024-11-16 19:25:03,896 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 145 predicate places. [2024-11-16 19:25:03,896 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 138 transitions, 1749 flow [2024-11-16 19:25:03,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.210526315789474) internal successors, (213), 19 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:25:03,896 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:25:03,896 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:25:03,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-16 19:25:04,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:25:04,101 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:25:04,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:25:04,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1083505393, now seen corresponding path program 26 times [2024-11-16 19:25:04,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:25:04,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512572268] [2024-11-16 19:25:04,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:25:04,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:25:04,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:25:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:25:04,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:25:04,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512572268] [2024-11-16 19:25:04,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512572268] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:25:04,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750438930] [2024-11-16 19:25:04,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:25:04,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:25:04,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:25:04,665 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:25:04,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-16 19:25:04,853 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:25:04,853 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:25:04,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-16 19:25:04,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:25:05,058 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:25:05,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-11-16 19:25:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:25:05,127 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:25:05,268 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-16 19:25:05,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-16 19:25:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:25:05,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750438930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:25:05,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:25:05,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-11-16 19:25:05,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052872690] [2024-11-16 19:25:05,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:25:05,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-16 19:25:05,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:25:05,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-16 19:25:05,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-11-16 19:25:05,319 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:25:05,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 138 transitions, 1749 flow. Second operand has 20 states, 20 states have (on average 11.35) internal successors, (227), 20 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:25:05,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:25:05,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:25:05,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:25:05,898 INFO L124 PetriNetUnfolderBase]: 610/1269 cut-off events. [2024-11-16 19:25:05,898 INFO L125 PetriNetUnfolderBase]: For 19724/19732 co-relation queries the response was YES. [2024-11-16 19:25:05,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8040 conditions, 1269 events. 610/1269 cut-off events. For 19724/19732 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7400 event pairs, 268 based on Foata normal form. 20/1287 useless extension candidates. Maximal degree in co-relation 7981. Up to 942 conditions per place. [2024-11-16 19:25:05,910 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 120 selfloop transitions, 30 changer transitions 0/157 dead transitions. [2024-11-16 19:25:05,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 157 transitions, 2296 flow [2024-11-16 19:25:05,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-16 19:25:05,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-16 19:25:05,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 152 transitions. [2024-11-16 19:25:05,912 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40641711229946526 [2024-11-16 19:25:05,912 INFO L175 Difference]: Start difference. First operand has 175 places, 138 transitions, 1749 flow. Second operand 11 states and 152 transitions. [2024-11-16 19:25:05,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 157 transitions, 2296 flow [2024-11-16 19:25:05,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 157 transitions, 2195 flow, removed 23 selfloop flow, removed 12 redundant places. [2024-11-16 19:25:05,949 INFO L231 Difference]: Finished difference. Result has 172 places, 137 transitions, 1770 flow [2024-11-16 19:25:05,950 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1632, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1770, PETRI_PLACES=172, PETRI_TRANSITIONS=137} [2024-11-16 19:25:05,950 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2024-11-16 19:25:05,950 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 137 transitions, 1770 flow [2024-11-16 19:25:05,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.35) internal successors, (227), 20 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:25:05,951 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:25:05,951 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:25:05,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-16 19:25:06,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-16 19:25:06,152 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:25:06,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:25:06,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1120535731, now seen corresponding path program 27 times [2024-11-16 19:25:06,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:25:06,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945579549] [2024-11-16 19:25:06,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:25:06,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:25:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:25:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:25:06,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:25:06,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945579549] [2024-11-16 19:25:06,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945579549] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:25:06,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849384580] [2024-11-16 19:25:06,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:25:06,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:25:06,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:25:06,812 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:25:06,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-16 19:25:07,007 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-16 19:25:07,007 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:25:07,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-16 19:25:07,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:25:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:25:07,231 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:25:07,345 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-16 19:25:07,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-16 19:25:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 19:25:07,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849384580] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:25:07,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:25:07,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 21 [2024-11-16 19:25:07,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780429028] [2024-11-16 19:25:07,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:25:07,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-16 19:25:07,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:25:07,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-16 19:25:07,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-11-16 19:25:07,427 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-16 19:25:07,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 137 transitions, 1770 flow. Second operand has 21 states, 21 states have (on average 11.238095238095237) internal successors, (236), 21 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:25:07,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:25:07,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-16 19:25:07,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:25:07,856 INFO L124 PetriNetUnfolderBase]: 593/1221 cut-off events. [2024-11-16 19:25:07,856 INFO L125 PetriNetUnfolderBase]: For 17970/17978 co-relation queries the response was YES. [2024-11-16 19:25:07,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7719 conditions, 1221 events. 593/1221 cut-off events. For 17970/17978 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6980 event pairs, 246 based on Foata normal form. 12/1231 useless extension candidates. Maximal degree in co-relation 7661. Up to 918 conditions per place. [2024-11-16 19:25:07,868 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 117 selfloop transitions, 21 changer transitions 10/155 dead transitions. [2024-11-16 19:25:07,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 155 transitions, 2252 flow [2024-11-16 19:25:07,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 19:25:07,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-16 19:25:07,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-11-16 19:25:07,869 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4084967320261438 [2024-11-16 19:25:07,869 INFO L175 Difference]: Start difference. First operand has 172 places, 137 transitions, 1770 flow. Second operand 9 states and 125 transitions. [2024-11-16 19:25:07,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 155 transitions, 2252 flow [2024-11-16 19:25:07,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 155 transitions, 2184 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-11-16 19:25:07,897 INFO L231 Difference]: Finished difference. Result has 174 places, 137 transitions, 1755 flow [2024-11-16 19:25:07,898 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1755, PETRI_PLACES=174, PETRI_TRANSITIONS=137} [2024-11-16 19:25:07,898 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 144 predicate places. [2024-11-16 19:25:07,898 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 137 transitions, 1755 flow [2024-11-16 19:25:07,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 11.238095238095237) internal successors, (236), 21 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:25:07,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:25:07,899 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:25:07,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-16 19:25:08,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-16 19:25:08,099 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:25:08,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:25:08,099 INFO L85 PathProgramCache]: Analyzing trace with hash 394363085, now seen corresponding path program 28 times [2024-11-16 19:25:08,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:25:08,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230945949] [2024-11-16 19:25:08,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:25:08,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:25:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat