./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_unsafe-6.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/fib_unsafe-6.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 854e371c98b43d805c328b457758892c4a501d7b326c2672c089850792494a4b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 16:04:35,416 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 16:04:35,470 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 16:04:35,474 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 16:04:35,477 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 16:04:35,490 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 16:04:35,492 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 16:04:35,493 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 16:04:35,493 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 16:04:35,496 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 16:04:35,496 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 16:04:35,496 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 16:04:35,497 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 16:04:35,498 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 16:04:35,498 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 16:04:35,499 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 16:04:35,499 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 16:04:35,499 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 16:04:35,499 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 16:04:35,499 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 16:04:35,499 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 16:04:35,500 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 16:04:35,500 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 16:04:35,500 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 16:04:35,500 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 16:04:35,501 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 16:04:35,501 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 16:04:35,501 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 16:04:35,501 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 16:04:35,502 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 16:04:35,502 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 16:04:35,502 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 16:04:35,503 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 16:04:35,503 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 16:04:35,503 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 16:04:35,503 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 16:04:35,503 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 16:04:35,503 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 16:04:35,504 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 16:04:35,504 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 16:04:35,504 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 16:04:35,504 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 16:04:35,504 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 16:04:35,504 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 854e371c98b43d805c328b457758892c4a501d7b326c2672c089850792494a4b [2024-01-27 16:04:35,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 16:04:35,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 16:04:35,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 16:04:35,726 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 16:04:35,726 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 16:04:35,727 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-6.i [2024-01-27 16:04:36,676 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 16:04:36,891 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 16:04:36,894 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-6.i [2024-01-27 16:04:36,909 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a31ddefdf/8a7254c0b9244825910ea53382319c3c/FLAG1b10e9e79 [2024-01-27 16:04:36,919 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a31ddefdf/8a7254c0b9244825910ea53382319c3c [2024-01-27 16:04:36,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 16:04:36,924 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 16:04:36,925 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 16:04:36,926 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 16:04:36,929 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 16:04:36,930 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 04:04:36" (1/1) ... [2024-01-27 16:04:36,936 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f1d9f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:04:36, skipping insertion in model container [2024-01-27 16:04:36,936 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 04:04:36" (1/1) ... [2024-01-27 16:04:36,966 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 16:04:37,203 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/fib_unsafe-6.i[30243,30256] [2024-01-27 16:04:37,223 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 16:04:37,232 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 16:04:37,266 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/fib_unsafe-6.i[30243,30256] [2024-01-27 16:04:37,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 16:04:37,304 INFO L206 MainTranslator]: Completed translation [2024-01-27 16:04:37,304 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:04:37 WrapperNode [2024-01-27 16:04:37,304 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 16:04:37,306 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 16:04:37,306 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 16:04:37,306 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 16:04:37,311 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:04:37" (1/1) ... [2024-01-27 16:04:37,337 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:04:37" (1/1) ... [2024-01-27 16:04:37,357 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2024-01-27 16:04:37,357 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 16:04:37,358 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 16:04:37,358 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 16:04:37,358 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 16:04:37,366 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:04:37" (1/1) ... [2024-01-27 16:04:37,366 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:04:37" (1/1) ... [2024-01-27 16:04:37,371 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:04:37" (1/1) ... [2024-01-27 16:04:37,391 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-27 16:04:37,391 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:04:37" (1/1) ... [2024-01-27 16:04:37,391 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:04:37" (1/1) ... [2024-01-27 16:04:37,400 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:04:37" (1/1) ... [2024-01-27 16:04:37,402 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:04:37" (1/1) ... [2024-01-27 16:04:37,408 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:04:37" (1/1) ... [2024-01-27 16:04:37,410 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:04:37" (1/1) ... [2024-01-27 16:04:37,414 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 16:04:37,414 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 16:04:37,414 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 16:04:37,415 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 16:04:37,415 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:04:37" (1/1) ... [2024-01-27 16:04:37,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 16:04:37,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:04:37,440 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 16:04:37,457 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 16:04:37,481 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-27 16:04:37,481 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-27 16:04:37,481 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-27 16:04:37,481 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-27 16:04:37,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 16:04:37,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 16:04:37,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 16:04:37,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 16:04:37,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 16:04:37,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 16:04:37,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 16:04:37,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 16:04:37,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 16:04:37,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 16:04:37,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 16:04:37,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 16:04:37,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 16:04:37,486 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 16:04:37,598 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 16:04:37,599 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 16:04:37,728 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 16:04:37,728 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 16:04:37,804 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 16:04:37,804 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 16:04:37,805 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 04:04:37 BoogieIcfgContainer [2024-01-27 16:04:37,805 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 16:04:37,806 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 16:04:37,806 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 16:04:37,817 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 16:04:37,817 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 04:04:36" (1/3) ... [2024-01-27 16:04:37,817 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ee91df5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 04:04:37, skipping insertion in model container [2024-01-27 16:04:37,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:04:37" (2/3) ... [2024-01-27 16:04:37,818 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ee91df5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 04:04:37, skipping insertion in model container [2024-01-27 16:04:37,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 04:04:37" (3/3) ... [2024-01-27 16:04:37,819 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-6.i [2024-01-27 16:04:37,825 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 16:04:37,831 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 16:04:37,831 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 16:04:37,832 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 16:04:37,853 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 16:04:37,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2024-01-27 16:04:37,890 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2024-01-27 16:04:37,890 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 16:04:37,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-01-27 16:04:37,892 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2024-01-27 16:04:37,895 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2024-01-27 16:04:37,911 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:04:37,917 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;@6ba1d74c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:04:37,919 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 16:04:37,928 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:04:37,934 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2024-01-27 16:04:37,934 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 16:04:37,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:04:37,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:04:37,936 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:04:37,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:04:37,940 INFO L85 PathProgramCache]: Analyzing trace with hash -369539475, now seen corresponding path program 1 times [2024-01-27 16:04:37,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:04:37,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583655480] [2024-01-27 16:04:37,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:04:37,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:04:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:04:38,235 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 16:04:38,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:04:38,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583655480] [2024-01-27 16:04:38,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583655480] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:04:38,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:04:38,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 16:04:38,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812593026] [2024-01-27 16:04:38,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:04:38,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 16:04:38,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:04:38,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 16:04:38,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 16:04:38,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-01-27 16:04:38,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 60 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) [2024-01-27 16:04:38,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:04:38,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-01-27 16:04:38,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:04:38,329 INFO L124 PetriNetUnfolderBase]: 115/223 cut-off events. [2024-01-27 16:04:38,329 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 16:04:38,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 223 events. 115/223 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 689 event pairs, 20 based on Foata normal form. 9/209 useless extension candidates. Maximal degree in co-relation 398. Up to 118 conditions per place. [2024-01-27 16:04:38,334 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 20 selfloop transitions, 2 changer transitions 1/33 dead transitions. [2024-01-27 16:04:38,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 118 flow [2024-01-27 16:04:38,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 16:04:38,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 16:04:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-01-27 16:04:38,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2024-01-27 16:04:38,344 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 60 flow. Second operand 3 states and 61 transitions. [2024-01-27 16:04:38,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 33 transitions, 118 flow [2024-01-27 16:04:38,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 116 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 16:04:38,348 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 66 flow [2024-01-27 16:04:38,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2024-01-27 16:04:38,352 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-01-27 16:04:38,352 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 66 flow [2024-01-27 16:04:38,352 INFO L496 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) [2024-01-27 16:04:38,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:04:38,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:04:38,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 16:04:38,353 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:04:38,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:04:38,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1403763973, now seen corresponding path program 1 times [2024-01-27 16:04:38,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:04:38,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688438586] [2024-01-27 16:04:38,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:04:38,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:04:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:04:38,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:04:38,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:04:38,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688438586] [2024-01-27 16:04:38,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688438586] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:04:38,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270399209] [2024-01-27 16:04:38,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:04:38,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:04:38,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:04:38,410 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:04:38,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 16:04:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:04:38,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-27 16:04:38,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:04:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:04:38,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:04:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:04:38,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270399209] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:04:38,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:04:38,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-01-27 16:04:38,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727211438] [2024-01-27 16:04:38,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:04:38,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 16:04:38,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:04:38,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 16:04:38,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-01-27 16:04:38,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-01-27 16:04:38,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 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 16:04:38,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:04:38,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-01-27 16:04:38,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:04:38,657 INFO L124 PetriNetUnfolderBase]: 151/277 cut-off events. [2024-01-27 16:04:38,658 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 16:04:38,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 277 events. 151/277 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 802 event pairs, 20 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 569. Up to 91 conditions per place. [2024-01-27 16:04:38,660 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 38 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-01-27 16:04:38,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 53 transitions, 212 flow [2024-01-27 16:04:38,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 16:04:38,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 16:04:38,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-01-27 16:04:38,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6781609195402298 [2024-01-27 16:04:38,662 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 66 flow. Second operand 6 states and 118 transitions. [2024-01-27 16:04:38,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 53 transitions, 212 flow [2024-01-27 16:04:38,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 53 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 16:04:38,664 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 100 flow [2024-01-27 16:04:38,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2024-01-27 16:04:38,664 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-01-27 16:04:38,665 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 100 flow [2024-01-27 16:04:38,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 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 16:04:38,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:04:38,665 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:04:38,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 16:04:38,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:04:38,869 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:04:38,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:04:38,869 INFO L85 PathProgramCache]: Analyzing trace with hash -30528403, now seen corresponding path program 2 times [2024-01-27 16:04:38,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:04:38,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329345471] [2024-01-27 16:04:38,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:04:38,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:04:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:04:38,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:04:38,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:04:38,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329345471] [2024-01-27 16:04:38,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329345471] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:04:38,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759306754] [2024-01-27 16:04:38,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 16:04:38,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:04:38,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:04:38,977 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:04:38,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 16:04:39,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 16:04:39,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:04:39,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 16:04:39,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:04:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:04:39,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:04:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:04:39,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759306754] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:04:39,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:04:39,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-27 16:04:39,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865358094] [2024-01-27 16:04:39,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:04:39,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 16:04:39,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:04:39,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 16:04:39,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-01-27 16:04:39,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-01-27 16:04:39,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 100 flow. Second operand has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 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 16:04:39,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:04:39,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-01-27 16:04:39,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:04:39,314 INFO L124 PetriNetUnfolderBase]: 259/439 cut-off events. [2024-01-27 16:04:39,314 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2024-01-27 16:04:39,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1110 conditions, 439 events. 259/439 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1197 event pairs, 20 based on Foata normal form. 54/479 useless extension candidates. Maximal degree in co-relation 1091. Up to 109 conditions per place. [2024-01-27 16:04:39,319 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 74 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-01-27 16:04:39,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 95 transitions, 426 flow [2024-01-27 16:04:39,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 16:04:39,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 16:04:39,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 235 transitions. [2024-01-27 16:04:39,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6752873563218391 [2024-01-27 16:04:39,328 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 100 flow. Second operand 12 states and 235 transitions. [2024-01-27 16:04:39,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 95 transitions, 426 flow [2024-01-27 16:04:39,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 95 transitions, 412 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-27 16:04:39,331 INFO L231 Difference]: Finished difference. Result has 53 places, 35 transitions, 170 flow [2024-01-27 16:04:39,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=170, PETRI_PLACES=53, PETRI_TRANSITIONS=35} [2024-01-27 16:04:39,332 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2024-01-27 16:04:39,332 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 35 transitions, 170 flow [2024-01-27 16:04:39,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 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 16:04:39,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:04:39,332 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:04:39,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 16:04:39,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-01-27 16:04:39,544 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:04:39,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:04:39,545 INFO L85 PathProgramCache]: Analyzing trace with hash -246684307, now seen corresponding path program 3 times [2024-01-27 16:04:39,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:04:39,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403155655] [2024-01-27 16:04:39,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:04:39,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:04:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:04:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:04:39,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:04:39,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403155655] [2024-01-27 16:04:39,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403155655] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:04:39,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691467271] [2024-01-27 16:04:39,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 16:04:39,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:04:39,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:04:39,728 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:04:39,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 16:04:39,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-01-27 16:04:39,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:04:39,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 16:04:39,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:04:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:04:39,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:04:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:04:39,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691467271] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:04:39,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:04:39,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 17 [2024-01-27 16:04:39,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317851919] [2024-01-27 16:04:39,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:04:39,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 16:04:39,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:04:39,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 16:04:39,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-01-27 16:04:39,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-01-27 16:04:39,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 35 transitions, 170 flow. Second operand has 17 states, 17 states have (on average 13.470588235294118) internal successors, (229), 17 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:04:39,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:04:39,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-01-27 16:04:39,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:04:40,143 INFO L124 PetriNetUnfolderBase]: 331/547 cut-off events. [2024-01-27 16:04:40,144 INFO L125 PetriNetUnfolderBase]: For 1611/1611 co-relation queries the response was YES. [2024-01-27 16:04:40,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1594 conditions, 547 events. 331/547 cut-off events. For 1611/1611 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1464 event pairs, 20 based on Foata normal form. 36/569 useless extension candidates. Maximal degree in co-relation 1568. Up to 118 conditions per place. [2024-01-27 16:04:40,149 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 98 selfloop transitions, 15 changer transitions 0/123 dead transitions. [2024-01-27 16:04:40,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 123 transitions, 596 flow [2024-01-27 16:04:40,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 16:04:40,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 16:04:40,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 309 transitions. [2024-01-27 16:04:40,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.665948275862069 [2024-01-27 16:04:40,152 INFO L175 Difference]: Start difference. First operand has 53 places, 35 transitions, 170 flow. Second operand 16 states and 309 transitions. [2024-01-27 16:04:40,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 123 transitions, 596 flow [2024-01-27 16:04:40,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 123 transitions, 540 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-01-27 16:04:40,158 INFO L231 Difference]: Finished difference. Result has 67 places, 39 transitions, 194 flow [2024-01-27 16:04:40,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=194, PETRI_PLACES=67, PETRI_TRANSITIONS=39} [2024-01-27 16:04:40,158 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2024-01-27 16:04:40,159 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 39 transitions, 194 flow [2024-01-27 16:04:40,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 13.470588235294118) internal successors, (229), 17 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:04:40,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:04:40,159 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:04:40,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 16:04:40,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:04:40,372 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:04:40,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:04:40,372 INFO L85 PathProgramCache]: Analyzing trace with hash -853980307, now seen corresponding path program 4 times [2024-01-27 16:04:40,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:04:40,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238271181] [2024-01-27 16:04:40,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:04:40,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:04:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:04:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:04:41,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:04:41,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238271181] [2024-01-27 16:04:41,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238271181] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:04:41,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081708521] [2024-01-27 16:04:41,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 16:04:41,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:04:41,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:04:41,144 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:04:41,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 16:04:41,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 16:04:41,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:04:41,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 53 conjunts are in the unsatisfiable core [2024-01-27 16:04:41,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:04:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 78 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:04:41,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:04:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:04:42,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081708521] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:04:42,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:04:42,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 60 [2024-01-27 16:04:42,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826137690] [2024-01-27 16:04:42,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:04:42,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-01-27 16:04:42,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:04:42,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-01-27 16:04:42,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=3148, Unknown=0, NotChecked=0, Total=3660 [2024-01-27 16:04:42,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 16:04:42,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 39 transitions, 194 flow. Second operand has 61 states, 61 states have (on average 6.278688524590164) internal successors, (383), 61 states have internal predecessors, (383), 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 16:04:42,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:04:42,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 16:04:42,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:04:57,223 INFO L124 PetriNetUnfolderBase]: 15598/25634 cut-off events. [2024-01-27 16:04:57,224 INFO L125 PetriNetUnfolderBase]: For 54615/54615 co-relation queries the response was YES. [2024-01-27 16:04:57,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67805 conditions, 25634 events. 15598/25634 cut-off events. For 54615/54615 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 166569 event pairs, 104 based on Foata normal form. 0/25306 useless extension candidates. Maximal degree in co-relation 67773. Up to 3297 conditions per place. [2024-01-27 16:04:57,456 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 568 selfloop transitions, 575 changer transitions 701/1847 dead transitions. [2024-01-27 16:04:57,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 1847 transitions, 10947 flow [2024-01-27 16:04:57,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2024-01-27 16:04:57,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2024-01-27 16:04:57,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 2334 transitions. [2024-01-27 16:04:57,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45990147783251234 [2024-01-27 16:04:57,463 INFO L175 Difference]: Start difference. First operand has 67 places, 39 transitions, 194 flow. Second operand 175 states and 2334 transitions. [2024-01-27 16:04:57,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 1847 transitions, 10947 flow [2024-01-27 16:04:57,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 1847 transitions, 9421 flow, removed 442 selfloop flow, removed 11 redundant places. [2024-01-27 16:04:57,578 INFO L231 Difference]: Finished difference. Result has 300 places, 666 transitions, 4020 flow [2024-01-27 16:04:57,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=175, PETRI_FLOW=4020, PETRI_PLACES=300, PETRI_TRANSITIONS=666} [2024-01-27 16:04:57,580 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 270 predicate places. [2024-01-27 16:04:57,580 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 666 transitions, 4020 flow [2024-01-27 16:04:57,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 6.278688524590164) internal successors, (383), 61 states have internal predecessors, (383), 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 16:04:57,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:04:57,581 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:04:57,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 16:04:57,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:04:57,796 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:04:57,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:04:57,796 INFO L85 PathProgramCache]: Analyzing trace with hash 895493725, now seen corresponding path program 1 times [2024-01-27 16:04:57,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:04:57,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280619102] [2024-01-27 16:04:57,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:04:57,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:04:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:04:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:04:58,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:04:58,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280619102] [2024-01-27 16:04:58,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280619102] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:04:58,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205552947] [2024-01-27 16:04:58,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:04:58,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:04:58,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:04:58,533 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:04:58,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 16:04:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:04:58,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 55 conjunts are in the unsatisfiable core [2024-01-27 16:04:58,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:04:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 78 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:04:59,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:05:00,312 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:05:00,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205552947] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:05:00,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:05:00,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 67 [2024-01-27 16:05:00,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733555115] [2024-01-27 16:05:00,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:05:00,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-01-27 16:05:00,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:05:00,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-01-27 16:05:00,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=4004, Unknown=0, NotChecked=0, Total=4556 [2024-01-27 16:05:00,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 16:05:00,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 666 transitions, 4020 flow. Second operand has 68 states, 68 states have (on average 6.323529411764706) internal successors, (430), 68 states have internal predecessors, (430), 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 16:05:00,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:05:00,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 16:05:00,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand