./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/01b_inc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/01b_inc.i -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 a50cd99e32ae608752174b749acce795b64973c8c13edb78d7146b3ab3630fc9 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:06:49,211 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:06:49,280 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:06:49,283 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:06:49,283 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:06:49,309 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:06:49,310 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:06:49,311 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:06:49,311 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:06:49,314 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:06:49,314 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:06:49,314 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:06:49,315 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:06:49,316 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:06:49,316 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:06:49,316 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:06:49,316 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:06:49,317 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:06:49,317 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:06:49,317 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:06:49,317 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:06:49,318 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:06:49,318 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:06:49,318 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:06:49,318 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:06:49,318 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:06:49,319 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:06:49,319 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:06:49,319 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:06:49,320 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:06:49,320 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:06:49,321 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:06:49,321 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:06:49,321 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:06:49,321 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:06:49,321 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:06:49,321 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:06:49,322 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:06:49,322 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:06:49,322 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:06:49,322 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:06:49,322 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:06:49,323 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:06:49,323 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a50cd99e32ae608752174b749acce795b64973c8c13edb78d7146b3ab3630fc9 [2024-01-27 15:06:49,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:06:49,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:06:49,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:06:49,517 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:06:49,517 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:06:49,518 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/01b_inc.i [2024-01-27 15:06:50,606 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:06:50,851 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:06:50,851 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i [2024-01-27 15:06:50,862 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19202733d/997cb72c94614bd88cdcd42f9e83ec1d/FLAGe9455e3b0 [2024-01-27 15:06:50,914 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19202733d/997cb72c94614bd88cdcd42f9e83ec1d [2024-01-27 15:06:50,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:06:50,917 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:06:50,921 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:06:50,921 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:06:50,925 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:06:50,926 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:06:50" (1/1) ... [2024-01-27 15:06:50,926 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@103c76bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:50, skipping insertion in model container [2024-01-27 15:06:50,926 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:06:50" (1/1) ... [2024-01-27 15:06:50,970 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:06:51,215 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i[31005,31018] [2024-01-27 15:06:51,227 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:06:51,235 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:06:51,270 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i[31005,31018] [2024-01-27 15:06:51,273 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:06:51,308 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:06:51,308 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:51 WrapperNode [2024-01-27 15:06:51,308 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:06:51,309 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:06:51,310 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:06:51,310 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:06:51,315 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:51" (1/1) ... [2024-01-27 15:06:51,328 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:51" (1/1) ... [2024-01-27 15:06:51,348 INFO L138 Inliner]: procedures = 172, calls = 19, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 61 [2024-01-27 15:06:51,349 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:06:51,349 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:06:51,350 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:06:51,350 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:06:51,357 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:51" (1/1) ... [2024-01-27 15:06:51,357 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:51" (1/1) ... [2024-01-27 15:06:51,359 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:51" (1/1) ... [2024-01-27 15:06:51,367 INFO L175 MemorySlicer]: Split 3 memory accesses to 2 slices as follows [2, 1]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-01-27 15:06:51,368 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:51" (1/1) ... [2024-01-27 15:06:51,368 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:51" (1/1) ... [2024-01-27 15:06:51,371 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:51" (1/1) ... [2024-01-27 15:06:51,373 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:51" (1/1) ... [2024-01-27 15:06:51,374 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:51" (1/1) ... [2024-01-27 15:06:51,374 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:51" (1/1) ... [2024-01-27 15:06:51,376 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:06:51,376 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:06:51,376 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:06:51,377 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:06:51,377 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:51" (1/1) ... [2024-01-27 15:06:51,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:06:51,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:06:51,409 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) [2024-01-27 15:06:51,411 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 [2024-01-27 15:06:51,450 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-01-27 15:06:51,450 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-01-27 15:06:51,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:06:51,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:06:51,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:06:51,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:06:51,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:06:51,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:06:51,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:06:51,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:06:51,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:06:51,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:06:51,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:06:51,453 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:06:51,541 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:06:51,564 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:06:51,672 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:06:51,672 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:06:51,738 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:06:51,745 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-01-27 15:06:51,746 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:06:51 BoogieIcfgContainer [2024-01-27 15:06:51,746 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:06:51,747 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:06:51,747 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:06:51,749 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:06:51,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:06:50" (1/3) ... [2024-01-27 15:06:51,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@298559e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:06:51, skipping insertion in model container [2024-01-27 15:06:51,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:51" (2/3) ... [2024-01-27 15:06:51,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@298559e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:06:51, skipping insertion in model container [2024-01-27 15:06:51,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:06:51" (3/3) ... [2024-01-27 15:06:51,751 INFO L112 eAbstractionObserver]: Analyzing ICFG 01b_inc.i [2024-01-27 15:06:51,757 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:06:51,765 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:06:51,766 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:06:51,766 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:06:51,810 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:06:51,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 20 places, 18 transitions, 40 flow [2024-01-27 15:06:51,872 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2024-01-27 15:06:51,874 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:06:51,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 20 events. 1/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-01-27 15:06:51,877 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 18 transitions, 40 flow [2024-01-27 15:06:51,879 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 18 transitions, 40 flow [2024-01-27 15:06:51,897 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:06:51,904 INFO L357 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, mHoare=true, 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;@7088140, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:06:51,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:06:51,914 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:06:51,914 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2024-01-27 15:06:51,914 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:06:51,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:06:51,915 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-01-27 15:06:51,915 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-01-27 15:06:51,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:06:51,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1623239452, now seen corresponding path program 1 times [2024-01-27 15:06:51,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:06:51,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832280951] [2024-01-27 15:06:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:06:51,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:06:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:06:52,023 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:06:52,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:06:52,051 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:06:52,053 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:06:52,053 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-01-27 15:06:52,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-01-27 15:06:52,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-01-27 15:06:52,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:06:52,056 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-27 15:06:52,058 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:06:52,058 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-27 15:06:52,087 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:06:52,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 31 transitions, 72 flow [2024-01-27 15:06:52,106 INFO L124 PetriNetUnfolderBase]: 2/36 cut-off events. [2024-01-27 15:06:52,106 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:06:52,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 36 events. 2/36 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 79 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 27. Up to 3 conditions per place. [2024-01-27 15:06:52,107 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 31 transitions, 72 flow [2024-01-27 15:06:52,107 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 31 transitions, 72 flow [2024-01-27 15:06:52,108 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:06:52,109 INFO L357 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, mHoare=true, 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;@7088140, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:06:52,109 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 15:06:52,120 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:06:52,120 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2024-01-27 15:06:52,120 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:06:52,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:06:52,121 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-01-27 15:06:52,121 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-01-27 15:06:52,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:06:52,122 INFO L85 PathProgramCache]: Analyzing trace with hash -688617243, now seen corresponding path program 1 times [2024-01-27 15:06:52,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:06:52,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300773784] [2024-01-27 15:06:52,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:06:52,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:06:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:06:52,172 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:06:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:06:52,186 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:06:52,187 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:06:52,187 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-01-27 15:06:52,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-01-27 15:06:52,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-01-27 15:06:52,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-01-27 15:06:52,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:06:52,188 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-27 15:06:52,213 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:06:52,213 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-27 15:06:52,232 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:06:52,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 44 transitions, 106 flow [2024-01-27 15:06:52,258 INFO L124 PetriNetUnfolderBase]: 3/52 cut-off events. [2024-01-27 15:06:52,259 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-27 15:06:52,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 52 events. 3/52 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 139 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 43. Up to 4 conditions per place. [2024-01-27 15:06:52,260 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 44 transitions, 106 flow [2024-01-27 15:06:52,262 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 44 transitions, 106 flow [2024-01-27 15:06:52,263 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:06:52,266 INFO L357 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, mHoare=true, 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;@7088140, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:06:52,267 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-01-27 15:06:52,272 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:06:52,274 INFO L124 PetriNetUnfolderBase]: 0/25 cut-off events. [2024-01-27 15:06:52,274 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 15:06:52,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:06:52,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:06:52,275 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:06:52,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:06:52,276 INFO L85 PathProgramCache]: Analyzing trace with hash 899996420, now seen corresponding path program 1 times [2024-01-27 15:06:52,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:06:52,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623689114] [2024-01-27 15:06:52,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:06:52,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:06:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:06:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:06:52,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:06:52,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623689114] [2024-01-27 15:06:52,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623689114] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:06:52,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:06:52,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:06:52,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582847493] [2024-01-27 15:06:52,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:06:52,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:06:52,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:06:52,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:06:52,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:06:52,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-01-27 15:06:52,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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) [2024-01-27 15:06:52,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:06:52,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-01-27 15:06:52,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:06:53,936 INFO L124 PetriNetUnfolderBase]: 9507/16241 cut-off events. [2024-01-27 15:06:53,938 INFO L125 PetriNetUnfolderBase]: For 661/661 co-relation queries the response was YES. [2024-01-27 15:06:53,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30381 conditions, 16241 events. 9507/16241 cut-off events. For 661/661 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 124471 event pairs, 2493 based on Foata normal form. 0/13946 useless extension candidates. Maximal degree in co-relation 23420. Up to 5955 conditions per place. [2024-01-27 15:06:54,026 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 97 selfloop transitions, 12 changer transitions 0/119 dead transitions. [2024-01-27 15:06:54,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 119 transitions, 512 flow [2024-01-27 15:06:54,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:06:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:06:54,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-01-27 15:06:54,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-01-27 15:06:54,037 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 106 flow. Second operand 6 states and 180 transitions. [2024-01-27 15:06:54,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 119 transitions, 512 flow [2024-01-27 15:06:54,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 119 transitions, 502 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-01-27 15:06:54,051 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 193 flow [2024-01-27 15:06:54,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=193, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2024-01-27 15:06:54,056 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 8 predicate places. [2024-01-27 15:06:54,056 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 193 flow [2024-01-27 15:06:54,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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) [2024-01-27 15:06:54,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:06:54,057 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-01-27 15:06:54,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:06:54,057 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:06:54,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:06:54,058 INFO L85 PathProgramCache]: Analyzing trace with hash 589427963, now seen corresponding path program 1 times [2024-01-27 15:06:54,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:06:54,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564961710] [2024-01-27 15:06:54,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:06:54,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:06:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:06:54,090 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:06:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:06:54,104 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:06:54,108 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:06:54,108 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-01-27 15:06:54,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-01-27 15:06:54,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-01-27 15:06:54,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-01-27 15:06:54,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-01-27 15:06:54,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:06:54,109 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-01-27 15:06:54,110 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:06:54,110 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-01-27 15:06:54,137 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:06:54,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 57 transitions, 142 flow [2024-01-27 15:06:54,146 INFO L124 PetriNetUnfolderBase]: 4/68 cut-off events. [2024-01-27 15:06:54,146 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-01-27 15:06:54,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 68 events. 4/68 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 191 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 64. Up to 5 conditions per place. [2024-01-27 15:06:54,146 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 57 transitions, 142 flow [2024-01-27 15:06:54,151 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 57 transitions, 142 flow [2024-01-27 15:06:54,152 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:06:54,157 INFO L357 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, mHoare=true, 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;@7088140, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:06:54,157 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-01-27 15:06:54,159 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:06:54,159 INFO L124 PetriNetUnfolderBase]: 0/25 cut-off events. [2024-01-27 15:06:54,159 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 15:06:54,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:06:54,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:06:54,160 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-01-27 15:06:54,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:06:54,160 INFO L85 PathProgramCache]: Analyzing trace with hash 364751433, now seen corresponding path program 1 times [2024-01-27 15:06:54,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:06:54,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761734151] [2024-01-27 15:06:54,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:06:54,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:06:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:06:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:06:54,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:06:54,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761734151] [2024-01-27 15:06:54,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761734151] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:06:54,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:06:54,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:06:54,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541772877] [2024-01-27 15:06:54,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:06:54,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:06:54,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:06:54,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:06:54,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:06:54,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2024-01-27 15:06:54,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2024-01-27 15:06:54,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:06:54,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2024-01-27 15:06:54,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:07:06,099 INFO L124 PetriNetUnfolderBase]: 154743/231464 cut-off events. [2024-01-27 15:07:06,100 INFO L125 PetriNetUnfolderBase]: For 13952/13952 co-relation queries the response was YES. [2024-01-27 15:07:06,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439869 conditions, 231464 events. 154743/231464 cut-off events. For 13952/13952 co-relation queries the response was YES. Maximal size of possible extension queue 8286. Compared 1975790 event pairs, 47541 based on Foata normal form. 0/194573 useless extension candidates. Maximal degree in co-relation 178754. Up to 95643 conditions per place. [2024-01-27 15:07:07,602 INFO L140 encePairwiseOnDemand]: 44/57 looper letters, 134 selfloop transitions, 15 changer transitions 0/162 dead transitions. [2024-01-27 15:07:07,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 162 transitions, 724 flow [2024-01-27 15:07:07,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:07:07,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:07:07,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 240 transitions. [2024-01-27 15:07:07,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7017543859649122 [2024-01-27 15:07:07,606 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 142 flow. Second operand 6 states and 240 transitions. [2024-01-27 15:07:07,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 162 transitions, 724 flow [2024-01-27 15:07:07,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 162 transitions, 694 flow, removed 15 selfloop flow, removed 0 redundant places. [2024-01-27 15:07:07,613 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 252 flow [2024-01-27 15:07:07,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2024-01-27 15:07:07,614 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 8 predicate places. [2024-01-27 15:07:07,614 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 252 flow [2024-01-27 15:07:07,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2024-01-27 15:07:07,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:07:07,614 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:07:07,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:07:07,615 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-01-27 15:07:07,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:07:07,615 INFO L85 PathProgramCache]: Analyzing trace with hash -169247421, now seen corresponding path program 1 times [2024-01-27 15:07:07,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:07:07,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004445406] [2024-01-27 15:07:07,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:07:07,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:07:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:07:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:07:07,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:07:07,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004445406] [2024-01-27 15:07:07,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004445406] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:07:07,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:07:07,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:07:07,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224060553] [2024-01-27 15:07:07,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:07:07,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:07:07,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:07:07,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:07:07,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:07:07,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2024-01-27 15:07:07,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 252 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:07:07,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:07:07,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2024-01-27 15:07:07,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:07:27,724 INFO L124 PetriNetUnfolderBase]: 238056/358805 cut-off events. [2024-01-27 15:07:27,728 INFO L125 PetriNetUnfolderBase]: For 112314/112314 co-relation queries the response was YES. [2024-01-27 15:07:28,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 772383 conditions, 358805 events. 238056/358805 cut-off events. For 112314/112314 co-relation queries the response was YES. Maximal size of possible extension queue 13027. Compared 3283841 event pairs, 83715 based on Foata normal form. 0/330197 useless extension candidates. Maximal degree in co-relation 684512. Up to 156936 conditions per place. [2024-01-27 15:07:30,402 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 145 selfloop transitions, 25 changer transitions 0/183 dead transitions. [2024-01-27 15:07:30,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 183 transitions, 963 flow [2024-01-27 15:07:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:07:30,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:07:30,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 227 transitions. [2024-01-27 15:07:30,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6637426900584795 [2024-01-27 15:07:30,408 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 252 flow. Second operand 6 states and 227 transitions. [2024-01-27 15:07:30,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 183 transitions, 963 flow [2024-01-27 15:07:33,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 183 transitions, 963 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:07:33,783 INFO L231 Difference]: Finished difference. Result has 77 places, 88 transitions, 423 flow [2024-01-27 15:07:33,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=423, PETRI_PLACES=77, PETRI_TRANSITIONS=88} [2024-01-27 15:07:33,784 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 15 predicate places. [2024-01-27 15:07:33,784 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 88 transitions, 423 flow [2024-01-27 15:07:33,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:07:33,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:07:33,785 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-01-27 15:07:33,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:07:33,785 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-01-27 15:07:33,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:07:33,785 INFO L85 PathProgramCache]: Analyzing trace with hash -2107054175, now seen corresponding path program 1 times [2024-01-27 15:07:33,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:07:33,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810314600] [2024-01-27 15:07:33,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:07:33,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:07:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:07:33,800 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:07:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:07:33,818 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:07:33,820 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:07:33,821 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-01-27 15:07:33,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-01-27 15:07:33,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-01-27 15:07:33,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-01-27 15:07:33,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-01-27 15:07:33,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-01-27 15:07:33,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 15:07:33,822 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-01-27 15:07:33,822 WARN L234 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:07:33,822 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-01-27 15:07:33,847 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:07:33,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 70 transitions, 180 flow [2024-01-27 15:07:33,852 INFO L124 PetriNetUnfolderBase]: 5/84 cut-off events. [2024-01-27 15:07:33,852 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-01-27 15:07:33,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 84 events. 5/84 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 241 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 86. Up to 6 conditions per place. [2024-01-27 15:07:33,853 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 70 transitions, 180 flow [2024-01-27 15:07:33,853 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 70 transitions, 180 flow [2024-01-27 15:07:33,854 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:07:33,854 INFO L357 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, mHoare=true, 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;@7088140, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:07:33,855 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-01-27 15:07:33,856 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:07:33,856 INFO L124 PetriNetUnfolderBase]: 0/25 cut-off events. [2024-01-27 15:07:33,856 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 15:07:33,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:07:33,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:07:33,856 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-01-27 15:07:33,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:07:33,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1611328027, now seen corresponding path program 1 times [2024-01-27 15:07:33,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:07:33,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987790260] [2024-01-27 15:07:33,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:07:33,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:07:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:07:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:07:33,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:07:33,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987790260] [2024-01-27 15:07:33,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987790260] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:07:33,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:07:33,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:07:33,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894933992] [2024-01-27 15:07:33,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:07:33,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:07:33,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:07:33,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:07:33,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:07:33,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 70 [2024-01-27 15:07:33,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2024-01-27 15:07:33,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:07:33,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 70 [2024-01-27 15:07:33,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand