./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/09_fmaxsym.i --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 448d4d75 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/09_fmaxsym.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 0bf02669c3dd381b0745ab8dce392518dfe698af15c4a94bd383f1dab20a8c06 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-448d4d7-m [2024-02-20 11:27:27,187 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-20 11:27:27,262 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-20 11:27:27,267 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-20 11:27:27,267 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-20 11:27:27,286 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-20 11:27:27,288 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-20 11:27:27,289 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-20 11:27:27,289 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-20 11:27:27,292 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-20 11:27:27,292 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-20 11:27:27,292 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-20 11:27:27,293 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-20 11:27:27,294 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-20 11:27:27,294 INFO L153 SettingsManager]: * Use SBE=true [2024-02-20 11:27:27,294 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-20 11:27:27,295 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-20 11:27:27,295 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-20 11:27:27,295 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-20 11:27:27,295 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-20 11:27:27,295 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-20 11:27:27,296 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-20 11:27:27,296 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-20 11:27:27,296 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-20 11:27:27,296 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-20 11:27:27,297 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-20 11:27:27,297 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-20 11:27:27,297 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-20 11:27:27,297 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-20 11:27:27,298 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-20 11:27:27,298 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-20 11:27:27,298 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-20 11:27:27,299 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 11:27:27,299 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-20 11:27:27,299 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-20 11:27:27,299 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-20 11:27:27,299 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-20 11:27:27,300 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-20 11:27:27,300 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-20 11:27:27,300 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-20 11:27:27,300 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-20 11:27:27,300 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-20 11:27:27,300 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-20 11:27:27,301 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bf02669c3dd381b0745ab8dce392518dfe698af15c4a94bd383f1dab20a8c06 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-20 11:27:27,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-20 11:27:27,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-20 11:27:27,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-20 11:27:27,522 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-20 11:27:27,522 INFO L274 PluginConnector]: CDTParser initialized [2024-02-20 11:27:27,523 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/09_fmaxsym.i [2024-02-20 11:27:28,494 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-20 11:27:28,678 INFO L384 CDTParser]: Found 1 translation units. [2024-02-20 11:27:28,679 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/09_fmaxsym.i [2024-02-20 11:27:28,694 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3514a444/e869aebec1d64de8beb0d5ca23e41d3d/FLAG5db2ff8b7 [2024-02-20 11:27:28,704 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3514a444/e869aebec1d64de8beb0d5ca23e41d3d [2024-02-20 11:27:28,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-20 11:27:28,706 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-20 11:27:28,707 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-20 11:27:28,707 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-20 11:27:28,715 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-20 11:27:28,715 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 11:27:28" (1/1) ... [2024-02-20 11:27:28,716 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c393fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:27:28, skipping insertion in model container [2024-02-20 11:27:28,718 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 11:27:28" (1/1) ... [2024-02-20 11:27:28,747 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-20 11:27:28,956 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/09_fmaxsym.i[30422,30435] [2024-02-20 11:27:28,964 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 11:27:28,972 INFO L202 MainTranslator]: Completed pre-run [2024-02-20 11:27:29,006 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/09_fmaxsym.i[30422,30435] [2024-02-20 11:27:29,009 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 11:27:29,044 INFO L206 MainTranslator]: Completed translation [2024-02-20 11:27:29,044 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:27:29 WrapperNode [2024-02-20 11:27:29,044 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-20 11:27:29,046 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-20 11:27:29,046 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-20 11:27:29,047 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-20 11:27:29,052 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:27:29" (1/1) ... [2024-02-20 11:27:29,081 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:27:29" (1/1) ... [2024-02-20 11:27:29,100 INFO L138 Inliner]: procedures = 171, calls = 24, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 77 [2024-02-20 11:27:29,101 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-20 11:27:29,101 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-20 11:27:29,101 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-20 11:27:29,102 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-20 11:27:29,108 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:27:29" (1/1) ... [2024-02-20 11:27:29,109 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:27:29" (1/1) ... [2024-02-20 11:27:29,114 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:27:29" (1/1) ... [2024-02-20 11:27:29,128 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 7, 1]. 70 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 6, 0]. The 1 writes are split as follows [0, 0, 1]. [2024-02-20 11:27:29,128 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:27:29" (1/1) ... [2024-02-20 11:27:29,129 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:27:29" (1/1) ... [2024-02-20 11:27:29,134 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:27:29" (1/1) ... [2024-02-20 11:27:29,136 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:27:29" (1/1) ... [2024-02-20 11:27:29,138 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:27:29" (1/1) ... [2024-02-20 11:27:29,139 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:27:29" (1/1) ... [2024-02-20 11:27:29,140 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-20 11:27:29,141 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-20 11:27:29,141 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-20 11:27:29,141 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-20 11:27:29,142 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:27:29" (1/1) ... [2024-02-20 11:27:29,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 11:27:29,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:27:29,171 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) [2024-02-20 11:27:29,216 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 [2024-02-20 11:27:29,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-20 11:27:29,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-20 11:27:29,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-20 11:27:29,237 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-02-20 11:27:29,237 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-02-20 11:27:29,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-20 11:27:29,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-20 11:27:29,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-20 11:27:29,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-20 11:27:29,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-20 11:27:29,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-20 11:27:29,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-20 11:27:29,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-20 11:27:29,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-20 11:27:29,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-20 11:27:29,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-20 11:27:29,241 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-20 11:27:29,333 INFO L244 CfgBuilder]: Building ICFG [2024-02-20 11:27:29,334 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-20 11:27:29,440 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-20 11:27:29,440 INFO L293 CfgBuilder]: Performing block encoding [2024-02-20 11:27:29,533 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-20 11:27:29,534 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-20 11:27:29,534 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 11:27:29 BoogieIcfgContainer [2024-02-20 11:27:29,534 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-20 11:27:29,536 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-20 11:27:29,537 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-20 11:27:29,539 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-20 11:27:29,540 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 11:27:28" (1/3) ... [2024-02-20 11:27:29,540 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b2577cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 11:27:29, skipping insertion in model container [2024-02-20 11:27:29,541 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:27:29" (2/3) ... [2024-02-20 11:27:29,541 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b2577cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 11:27:29, skipping insertion in model container [2024-02-20 11:27:29,541 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 11:27:29" (3/3) ... [2024-02-20 11:27:29,542 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym.i [2024-02-20 11:27:29,557 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-20 11:27:29,557 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-20 11:27:29,557 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-20 11:27:29,608 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:27:29,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 18 places, 17 transitions, 38 flow [2024-02-20 11:27:29,651 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-02-20 11:27:29,651 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-20 11:27:29,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23 conditions, 19 events. 2/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 21 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-02-20 11:27:29,653 INFO L82 GeneralOperation]: Start removeDead. Operand has 18 places, 17 transitions, 38 flow [2024-02-20 11:27:29,655 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 18 places, 17 transitions, 38 flow [2024-02-20 11:27:29,662 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:27:29,668 INFO L369 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=All, 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;@12497d96, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:27:29,668 INFO L370 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-02-20 11:27:29,672 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:27:29,673 INFO L124 PetriNetUnfolderBase]: 0/11 cut-off events. [2024-02-20 11:27:29,673 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-20 11:27:29,673 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:27:29,674 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-02-20 11:27:29,674 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-02-20 11:27:29,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:27:29,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1102042143, now seen corresponding path program 1 times [2024-02-20 11:27:29,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:27:29,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336448712] [2024-02-20 11:27:29,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:27:29,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:27:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:27:29,796 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-20 11:27:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:27:29,835 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-20 11:27:29,836 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-20 11:27:29,837 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-02-20 11:27:29,839 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-02-20 11:27:29,839 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-02-20 11:27:29,840 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-20 11:27:29,840 INFO L457 BasicCegarLoop]: Path program histogram: [1] [2024-02-20 11:27:29,842 WARN L345 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-20 11:27:29,842 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-20 11:27:29,862 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:27:29,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 29 transitions, 68 flow [2024-02-20 11:27:29,877 INFO L124 PetriNetUnfolderBase]: 4/34 cut-off events. [2024-02-20 11:27:29,877 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 11:27:29,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 34 events. 4/34 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 66 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 25. Up to 3 conditions per place. [2024-02-20 11:27:29,878 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 29 transitions, 68 flow [2024-02-20 11:27:29,879 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 29 transitions, 68 flow [2024-02-20 11:27:29,880 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:27:29,881 INFO L369 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=All, 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;@12497d96, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:27:29,881 INFO L370 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-02-20 11:27:29,886 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:27:29,886 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2024-02-20 11:27:29,887 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 11:27:29,887 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:27:29,887 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-02-20 11:27:29,887 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-02-20 11:27:29,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:27:29,888 INFO L85 PathProgramCache]: Analyzing trace with hash -83212302, now seen corresponding path program 1 times [2024-02-20 11:27:29,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:27:29,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898317043] [2024-02-20 11:27:29,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:27:29,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:27:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:27:29,934 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-20 11:27:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:27:29,960 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-20 11:27:29,960 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-20 11:27:29,960 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-02-20 11:27:29,961 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-02-20 11:27:29,961 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-02-20 11:27:29,962 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-02-20 11:27:29,962 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-20 11:27:29,962 INFO L457 BasicCegarLoop]: Path program histogram: [1] [2024-02-20 11:27:29,963 WARN L345 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-20 11:27:29,963 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-20 11:27:29,990 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:27:29,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 41 transitions, 100 flow [2024-02-20 11:27:30,015 INFO L124 PetriNetUnfolderBase]: 6/49 cut-off events. [2024-02-20 11:27:30,016 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-20 11:27:30,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 6/49 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 109 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 41. Up to 4 conditions per place. [2024-02-20 11:27:30,018 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 41 transitions, 100 flow [2024-02-20 11:27:30,019 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 41 transitions, 100 flow [2024-02-20 11:27:30,020 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:27:30,024 INFO L369 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=All, 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;@12497d96, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:27:30,024 INFO L370 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-02-20 11:27:30,035 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:27:30,036 INFO L124 PetriNetUnfolderBase]: 2/29 cut-off events. [2024-02-20 11:27:30,036 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-20 11:27:30,036 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:27:30,036 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:27:30,037 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-20 11:27:30,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:27:30,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1354578706, now seen corresponding path program 1 times [2024-02-20 11:27:30,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:27:30,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136997796] [2024-02-20 11:27:30,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:27:30,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:27:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:27:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:27:30,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:27:30,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136997796] [2024-02-20 11:27:30,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136997796] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:27:30,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:27:30,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 11:27:30,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119734975] [2024-02-20 11:27:30,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:27:30,228 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 11:27:30,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:27:30,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 11:27:30,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 11:27:30,260 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-02-20 11:27:30,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2024-02-20 11:27:30,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:27:30,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-02-20 11:27:30,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:27:30,837 INFO L124 PetriNetUnfolderBase]: 4105/6206 cut-off events. [2024-02-20 11:27:30,838 INFO L125 PetriNetUnfolderBase]: For 451/451 co-relation queries the response was YES. [2024-02-20 11:27:30,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12138 conditions, 6206 events. 4105/6206 cut-off events. For 451/451 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 33578 event pairs, 1790 based on Foata normal form. 390/5654 useless extension candidates. Maximal degree in co-relation 3320. Up to 3215 conditions per place. [2024-02-20 11:27:30,874 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 45 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2024-02-20 11:27:30,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 55 transitions, 236 flow [2024-02-20 11:27:30,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 11:27:30,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 11:27:30,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-02-20 11:27:30,883 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-02-20 11:27:30,888 INFO L308 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2024-02-20 11:27:30,891 INFO L507 AbstractCegarLoop]: Abstraction has has 41 places, 55 transitions, 236 flow [2024-02-20 11:27:30,892 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2024-02-20 11:27:30,892 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:27:30,892 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-02-20 11:27:30,892 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-20 11:27:30,892 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-20 11:27:30,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:27:30,893 INFO L85 PathProgramCache]: Analyzing trace with hash -309764960, now seen corresponding path program 1 times [2024-02-20 11:27:30,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:27:30,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111138734] [2024-02-20 11:27:30,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:27:30,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:27:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:27:30,917 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-20 11:27:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:27:30,940 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-20 11:27:30,941 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-20 11:27:30,941 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-02-20 11:27:30,941 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-02-20 11:27:30,941 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-02-20 11:27:30,942 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-02-20 11:27:30,942 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-02-20 11:27:30,942 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-20 11:27:30,942 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-20 11:27:30,943 WARN L345 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-20 11:27:30,943 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-02-20 11:27:30,973 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:27:30,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 53 transitions, 134 flow [2024-02-20 11:27:30,984 INFO L124 PetriNetUnfolderBase]: 8/64 cut-off events. [2024-02-20 11:27:30,985 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-02-20 11:27:30,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 64 events. 8/64 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 151 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 61. Up to 5 conditions per place. [2024-02-20 11:27:30,985 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 53 transitions, 134 flow [2024-02-20 11:27:30,987 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 53 transitions, 134 flow [2024-02-20 11:27:30,988 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:27:30,992 INFO L369 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=All, 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;@12497d96, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:27:30,992 INFO L370 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-02-20 11:27:30,995 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:27:30,995 INFO L124 PetriNetUnfolderBase]: 2/26 cut-off events. [2024-02-20 11:27:30,995 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-20 11:27:30,995 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:27:30,995 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:27:30,996 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-02-20 11:27:30,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:27:30,997 INFO L85 PathProgramCache]: Analyzing trace with hash 953205170, now seen corresponding path program 1 times [2024-02-20 11:27:30,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:27:30,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440243573] [2024-02-20 11:27:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:27:30,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:27:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:27:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:27:31,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:27:31,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440243573] [2024-02-20 11:27:31,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440243573] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:27:31,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:27:31,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 11:27:31,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065565211] [2024-02-20 11:27:31,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:27:31,077 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 11:27:31,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:27:31,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 11:27:31,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 11:27:31,089 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-02-20 11:27:31,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-02-20 11:27:31,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:27:31,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-02-20 11:27:31,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:27:34,654 INFO L124 PetriNetUnfolderBase]: 39532/54479 cut-off events. [2024-02-20 11:27:34,654 INFO L125 PetriNetUnfolderBase]: For 5561/5561 co-relation queries the response was YES. [2024-02-20 11:27:34,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107305 conditions, 54479 events. 39532/54479 cut-off events. For 5561/5561 co-relation queries the response was YES. Maximal size of possible extension queue 1570. Compared 330391 event pairs, 17666 based on Foata normal form. 4234/50464 useless extension candidates. Maximal degree in co-relation 12113. Up to 28499 conditions per place. [2024-02-20 11:27:34,962 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 61 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2024-02-20 11:27:34,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 74 transitions, 325 flow [2024-02-20 11:27:34,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 11:27:34,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 11:27:34,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-02-20 11:27:34,965 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-02-20 11:27:34,966 INFO L308 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-02-20 11:27:34,967 INFO L507 AbstractCegarLoop]: Abstraction has has 53 places, 74 transitions, 325 flow [2024-02-20 11:27:34,967 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-02-20 11:27:34,967 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:27:34,967 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:27:34,967 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-20 11:27:34,967 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-02-20 11:27:34,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:27:34,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1732787682, now seen corresponding path program 1 times [2024-02-20 11:27:34,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:27:34,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182323103] [2024-02-20 11:27:34,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:27:34,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:27:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:27:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:27:35,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:27:35,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182323103] [2024-02-20 11:27:35,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182323103] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:27:35,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:27:35,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 11:27:35,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668968143] [2024-02-20 11:27:35,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:27:35,034 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 11:27:35,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:27:35,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 11:27:35,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 11:27:35,045 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-02-20 11:27:35,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 74 transitions, 325 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2024-02-20 11:27:35,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:27:35,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-02-20 11:27:35,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:27:38,857 INFO L124 PetriNetUnfolderBase]: 52186/68866 cut-off events. [2024-02-20 11:27:38,857 INFO L125 PetriNetUnfolderBase]: For 15832/16834 co-relation queries the response was YES. [2024-02-20 11:27:38,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201283 conditions, 68866 events. 52186/68866 cut-off events. For 15832/16834 co-relation queries the response was YES. Maximal size of possible extension queue 1743. Compared 382789 event pairs, 12891 based on Foata normal form. 36/58120 useless extension candidates. Maximal degree in co-relation 30984. Up to 36652 conditions per place. [2024-02-20 11:27:39,282 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 107 selfloop transitions, 6 changer transitions 0/121 dead transitions. [2024-02-20 11:27:39,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 121 transitions, 775 flow [2024-02-20 11:27:39,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 11:27:39,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 11:27:39,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2024-02-20 11:27:39,287 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.610062893081761 [2024-02-20 11:27:39,290 INFO L308 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-02-20 11:27:39,291 INFO L507 AbstractCegarLoop]: Abstraction has has 53 places, 121 transitions, 775 flow [2024-02-20 11:27:39,292 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2024-02-20 11:27:39,292 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:27:39,292 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-02-20 11:27:39,292 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-20 11:27:39,293 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-02-20 11:27:39,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:27:39,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1436566715, now seen corresponding path program 1 times [2024-02-20 11:27:39,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:27:39,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723065286] [2024-02-20 11:27:39,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:27:39,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:27:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:27:39,310 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-20 11:27:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:27:39,325 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-20 11:27:39,327 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-20 11:27:39,327 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-02-20 11:27:39,327 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-02-20 11:27:39,328 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-02-20 11:27:39,328 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-02-20 11:27:39,328 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-02-20 11:27:39,328 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-02-20 11:27:39,328 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-20 11:27:39,328 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-02-20 11:27:39,329 WARN L345 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-20 11:27:39,329 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-02-20 11:27:39,360 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:27:39,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 65 transitions, 170 flow [2024-02-20 11:27:39,370 INFO L124 PetriNetUnfolderBase]: 10/79 cut-off events. [2024-02-20 11:27:39,370 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-02-20 11:27:39,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 79 events. 10/79 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 195 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 82. Up to 6 conditions per place. [2024-02-20 11:27:39,370 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 65 transitions, 170 flow [2024-02-20 11:27:39,371 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 65 transitions, 170 flow [2024-02-20 11:27:39,373 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:27:39,373 INFO L369 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=All, 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;@12497d96, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:27:39,373 INFO L370 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-02-20 11:27:39,376 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:27:39,376 INFO L124 PetriNetUnfolderBase]: 2/26 cut-off events. [2024-02-20 11:27:39,376 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-20 11:27:39,376 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:27:39,377 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:27:39,377 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-20 11:27:39,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:27:39,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1131970556, now seen corresponding path program 1 times [2024-02-20 11:27:39,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:27:39,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273136150] [2024-02-20 11:27:39,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:27:39,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:27:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:27:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:27:39,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:27:39,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273136150] [2024-02-20 11:27:39,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273136150] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:27:39,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:27:39,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 11:27:39,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248846424] [2024-02-20 11:27:39,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:27:39,432 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 11:27:39,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:27:39,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 11:27:39,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 11:27:39,443 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 65 [2024-02-20 11:27:39,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2024-02-20 11:27:39,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:27:39,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 65 [2024-02-20 11:27:39,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand