./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/weaver/parallel-misc-2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 387afe7095db5eeb3a9188bc3fe181fa803bb62f73944f6d781c5c9340fce39e --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:44:41,106 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:44:41,180 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:44:41,186 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:44:41,187 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:44:41,215 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:44:41,215 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:44:41,215 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:44:41,216 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:44:41,219 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:44:41,219 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:44:41,219 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:44:41,220 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:44:41,221 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:44:41,221 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:44:41,222 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:44:41,222 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:44:41,222 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:44:41,222 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:44:41,222 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:44:41,223 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:44:41,223 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:44:41,223 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:44:41,223 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:44:41,223 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:44:41,224 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:44:41,224 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:44:41,224 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:44:41,224 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:44:41,225 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:44:41,225 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:44:41,226 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:44:41,226 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:44:41,226 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:44:41,226 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:44:41,226 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:44:41,226 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:44:41,233 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:44:41,233 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:44:41,233 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:44:41,233 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:44:41,233 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:44:41,234 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:44:41,234 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 387afe7095db5eeb3a9188bc3fe181fa803bb62f73944f6d781c5c9340fce39e [2024-06-27 16:44:41,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:44:41,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:44:41,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:44:41,458 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:44:41,459 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:44:41,459 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c [2024-06-27 16:44:42,624 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:44:42,771 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:44:42,771 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c [2024-06-27 16:44:42,778 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b7faa723/9674e70544344b0faf8a924711c5c8d8/FLAG42c409b53 [2024-06-27 16:44:42,787 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b7faa723/9674e70544344b0faf8a924711c5c8d8 [2024-06-27 16:44:42,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:44:42,790 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:44:42,791 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:44:42,791 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:44:42,795 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:44:42,796 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:44:42" (1/1) ... [2024-06-27 16:44:42,796 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73434b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:42, skipping insertion in model container [2024-06-27 16:44:42,797 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:44:42" (1/1) ... [2024-06-27 16:44:42,813 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:44:42,966 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c[2580,2593] [2024-06-27 16:44:42,969 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:44:42,975 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:44:42,988 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c[2580,2593] [2024-06-27 16:44:42,989 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:44:43,002 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:44:43,004 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:43 WrapperNode [2024-06-27 16:44:43,004 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:44:43,006 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:44:43,006 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:44:43,006 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:44:43,011 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:43" (1/1) ... [2024-06-27 16:44:43,026 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:43" (1/1) ... [2024-06-27 16:44:43,046 INFO L138 Inliner]: procedures = 20, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 61 [2024-06-27 16:44:43,046 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:44:43,047 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:44:43,047 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:44:43,047 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:44:43,055 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:43" (1/1) ... [2024-06-27 16:44:43,055 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:43" (1/1) ... [2024-06-27 16:44:43,059 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:43" (1/1) ... [2024-06-27 16:44:43,081 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 16:44:43,081 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:43" (1/1) ... [2024-06-27 16:44:43,081 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:43" (1/1) ... [2024-06-27 16:44:43,115 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:43" (1/1) ... [2024-06-27 16:44:43,118 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:43" (1/1) ... [2024-06-27 16:44:43,121 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:43" (1/1) ... [2024-06-27 16:44:43,122 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:43" (1/1) ... [2024-06-27 16:44:43,125 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:44:43,126 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:44:43,126 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:44:43,127 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:44:43,127 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:43" (1/1) ... [2024-06-27 16:44:43,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:44:43,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:43,154 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) [2024-06-27 16:44:43,179 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 [2024-06-27 16:44:43,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:44:43,232 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 16:44:43,232 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 16:44:43,232 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 16:44:43,232 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 16:44:43,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:44:43,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 16:44:43,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 16:44:43,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:44:43,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:44:43,236 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 16:44:43,302 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:44:43,303 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:44:43,502 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:44:43,502 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:44:43,620 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:44:43,625 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-27 16:44:43,626 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:44:43 BoogieIcfgContainer [2024-06-27 16:44:43,626 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:44:43,636 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:44:43,636 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:44:43,638 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:44:43,638 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:44:42" (1/3) ... [2024-06-27 16:44:43,639 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@356848cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:44:43, skipping insertion in model container [2024-06-27 16:44:43,639 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:43" (2/3) ... [2024-06-27 16:44:43,639 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@356848cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:44:43, skipping insertion in model container [2024-06-27 16:44:43,639 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:44:43" (3/3) ... [2024-06-27 16:44:43,640 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-2.wvr.c [2024-06-27 16:44:43,646 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:44:43,653 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:44:43,654 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:44:43,654 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:44:43,701 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 16:44:43,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 28 transitions, 70 flow [2024-06-27 16:44:43,750 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2024-06-27 16:44:43,758 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:44:43,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 4/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 44 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-06-27 16:44:43,764 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 28 transitions, 70 flow [2024-06-27 16:44:43,766 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 25 transitions, 62 flow [2024-06-27 16:44:43,780 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:44:43,786 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;@59284612, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:44:43,786 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 16:44:43,801 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:44:43,801 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-06-27 16:44:43,801 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:44:43,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:43,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:43,805 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:43,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:43,814 INFO L85 PathProgramCache]: Analyzing trace with hash -314967004, now seen corresponding path program 1 times [2024-06-27 16:44:43,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:43,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245218670] [2024-06-27 16:44:43,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:43,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:44,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:44,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245218670] [2024-06-27 16:44:44,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245218670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:44:44,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:44:44,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:44:44,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627915712] [2024-06-27 16:44:44,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:44:44,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:44:44,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:44,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:44:44,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:44:44,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-06-27 16:44:44,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:44,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:44,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-06-27 16:44:44,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:44,198 INFO L124 PetriNetUnfolderBase]: 130/252 cut-off events. [2024-06-27 16:44:44,199 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-06-27 16:44:44,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 252 events. 130/252 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 939 event pairs, 12 based on Foata normal form. 1/214 useless extension candidates. Maximal degree in co-relation 404. Up to 165 conditions per place. [2024-06-27 16:44:44,202 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 21 selfloop transitions, 5 changer transitions 1/36 dead transitions. [2024-06-27 16:44:44,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 36 transitions, 147 flow [2024-06-27 16:44:44,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:44:44,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:44:44,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-06-27 16:44:44,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7261904761904762 [2024-06-27 16:44:44,214 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 62 flow. Second operand 3 states and 61 transitions. [2024-06-27 16:44:44,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 36 transitions, 147 flow [2024-06-27 16:44:44,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 133 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 16:44:44,219 INFO L231 Difference]: Finished difference. Result has 27 places, 29 transitions, 87 flow [2024-06-27 16:44:44,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=27, PETRI_TRANSITIONS=29} [2024-06-27 16:44:44,225 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -1 predicate places. [2024-06-27 16:44:44,225 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 29 transitions, 87 flow [2024-06-27 16:44:44,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:44,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:44,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:44,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:44:44,227 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:44,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:44,229 INFO L85 PathProgramCache]: Analyzing trace with hash 112974820, now seen corresponding path program 1 times [2024-06-27 16:44:44,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:44,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65382041] [2024-06-27 16:44:44,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:44,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:44,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:44,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65382041] [2024-06-27 16:44:44,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65382041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:44:44,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:44:44,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:44:44,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463019157] [2024-06-27 16:44:44,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:44:44,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:44:44,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:44,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:44:44,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:44:44,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-06-27 16:44:44,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 29 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:44,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:44,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-06-27 16:44:44,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:44,520 INFO L124 PetriNetUnfolderBase]: 173/318 cut-off events. [2024-06-27 16:44:44,521 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-06-27 16:44:44,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 678 conditions, 318 events. 173/318 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1320 event pairs, 16 based on Foata normal form. 0/232 useless extension candidates. Maximal degree in co-relation 342. Up to 129 conditions per place. [2024-06-27 16:44:44,526 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 35 selfloop transitions, 9 changer transitions 3/58 dead transitions. [2024-06-27 16:44:44,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 58 transitions, 254 flow [2024-06-27 16:44:44,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:44:44,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:44:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-27 16:44:44,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7214285714285714 [2024-06-27 16:44:44,529 INFO L175 Difference]: Start difference. First operand has 27 places, 29 transitions, 87 flow. Second operand 5 states and 101 transitions. [2024-06-27 16:44:44,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 58 transitions, 254 flow [2024-06-27 16:44:44,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 58 transitions, 247 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 16:44:44,534 INFO L231 Difference]: Finished difference. Result has 33 places, 36 transitions, 139 flow [2024-06-27 16:44:44,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=139, PETRI_PLACES=33, PETRI_TRANSITIONS=36} [2024-06-27 16:44:44,535 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2024-06-27 16:44:44,536 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 36 transitions, 139 flow [2024-06-27 16:44:44,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:44,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:44,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:44,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:44:44,537 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:44,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:44,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1594057982, now seen corresponding path program 2 times [2024-06-27 16:44:44,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:44,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694512304] [2024-06-27 16:44:44,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:44,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:44,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:44,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694512304] [2024-06-27 16:44:44,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694512304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:44:44,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:44:44,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:44:44,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102086803] [2024-06-27 16:44:44,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:44:44,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:44:44,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:44,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:44:44,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:44:44,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-06-27 16:44:44,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 36 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:44,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:44,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-06-27 16:44:44,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:44,720 INFO L124 PetriNetUnfolderBase]: 160/325 cut-off events. [2024-06-27 16:44:44,720 INFO L125 PetriNetUnfolderBase]: For 202/206 co-relation queries the response was YES. [2024-06-27 16:44:44,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 822 conditions, 325 events. 160/325 cut-off events. For 202/206 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1402 event pairs, 11 based on Foata normal form. 17/305 useless extension candidates. Maximal degree in co-relation 248. Up to 80 conditions per place. [2024-06-27 16:44:44,722 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 37 selfloop transitions, 12 changer transitions 3/63 dead transitions. [2024-06-27 16:44:44,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 63 transitions, 343 flow [2024-06-27 16:44:44,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:44:44,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:44:44,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-27 16:44:44,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7214285714285714 [2024-06-27 16:44:44,723 INFO L175 Difference]: Start difference. First operand has 33 places, 36 transitions, 139 flow. Second operand 5 states and 101 transitions. [2024-06-27 16:44:44,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 63 transitions, 343 flow [2024-06-27 16:44:44,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 63 transitions, 343 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 16:44:44,726 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 225 flow [2024-06-27 16:44:44,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=225, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2024-06-27 16:44:44,726 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 13 predicate places. [2024-06-27 16:44:44,727 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 225 flow [2024-06-27 16:44:44,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:44,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:44,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:44,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 16:44:44,727 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:44,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:44,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1183701864, now seen corresponding path program 1 times [2024-06-27 16:44:44,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:44,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321088297] [2024-06-27 16:44:44,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:44,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:44,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:44,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:44,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321088297] [2024-06-27 16:44:44,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321088297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:44:44,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:44:44,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:44:44,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740547813] [2024-06-27 16:44:44,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:44:44,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:44:44,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:44,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:44:44,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:44:44,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-06-27 16:44:44,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 225 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2024-06-27 16:44:44,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:44,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-06-27 16:44:44,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:44,860 INFO L124 PetriNetUnfolderBase]: 159/314 cut-off events. [2024-06-27 16:44:44,861 INFO L125 PetriNetUnfolderBase]: For 587/609 co-relation queries the response was YES. [2024-06-27 16:44:44,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1046 conditions, 314 events. 159/314 cut-off events. For 587/609 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1340 event pairs, 15 based on Foata normal form. 11/287 useless extension candidates. Maximal degree in co-relation 327. Up to 145 conditions per place. [2024-06-27 16:44:44,863 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 42 selfloop transitions, 8 changer transitions 4/65 dead transitions. [2024-06-27 16:44:44,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 65 transitions, 435 flow [2024-06-27 16:44:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:44:44,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:44:44,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-27 16:44:44,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7071428571428572 [2024-06-27 16:44:44,864 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 225 flow. Second operand 5 states and 99 transitions. [2024-06-27 16:44:44,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 65 transitions, 435 flow [2024-06-27 16:44:44,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 65 transitions, 431 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 16:44:44,867 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 272 flow [2024-06-27 16:44:44,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=272, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2024-06-27 16:44:44,868 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 19 predicate places. [2024-06-27 16:44:44,868 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 272 flow [2024-06-27 16:44:44,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2024-06-27 16:44:44,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:44,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:44,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 16:44:44,869 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:44,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:44,869 INFO L85 PathProgramCache]: Analyzing trace with hash 707370358, now seen corresponding path program 2 times [2024-06-27 16:44:44,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:44,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895235467] [2024-06-27 16:44:44,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:44,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:44,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:44,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:44,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895235467] [2024-06-27 16:44:44,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895235467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:44:44,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:44:44,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:44:44,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739547855] [2024-06-27 16:44:44,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:44:44,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:44:44,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:44,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:44:44,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:44:44,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-06-27 16:44:44,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 272 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2024-06-27 16:44:44,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:44,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-06-27 16:44:44,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:44,989 INFO L124 PetriNetUnfolderBase]: 148/311 cut-off events. [2024-06-27 16:44:44,989 INFO L125 PetriNetUnfolderBase]: For 623/631 co-relation queries the response was YES. [2024-06-27 16:44:44,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 311 events. 148/311 cut-off events. For 623/631 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1244 event pairs, 11 based on Foata normal form. 16/292 useless extension candidates. Maximal degree in co-relation 722. Up to 80 conditions per place. [2024-06-27 16:44:44,991 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 40 selfloop transitions, 12 changer transitions 2/65 dead transitions. [2024-06-27 16:44:44,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 65 transitions, 482 flow [2024-06-27 16:44:44,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:44:44,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:44:44,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-27 16:44:44,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2024-06-27 16:44:44,992 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 272 flow. Second operand 5 states and 96 transitions. [2024-06-27 16:44:44,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 65 transitions, 482 flow [2024-06-27 16:44:44,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 466 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 16:44:44,995 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 335 flow [2024-06-27 16:44:44,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=335, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-27 16:44:44,998 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 25 predicate places. [2024-06-27 16:44:44,998 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 335 flow [2024-06-27 16:44:44,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2024-06-27 16:44:44,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:44,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:44,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 16:44:44,999 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:45,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:45,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1306210578, now seen corresponding path program 1 times [2024-06-27 16:44:45,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:45,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103938809] [2024-06-27 16:44:45,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:45,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:45,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:45,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103938809] [2024-06-27 16:44:45,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103938809] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:45,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849854428] [2024-06-27 16:44:45,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:45,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:45,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:45,263 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) [2024-06-27 16:44:45,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 16:44:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:45,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2024-06-27 16:44:45,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:45,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:45,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:45,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849854428] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:45,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:45,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2024-06-27 16:44:45,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782332736] [2024-06-27 16:44:45,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:45,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 16:44:45,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:45,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 16:44:45,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-27 16:44:45,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 28 [2024-06-27 16:44:45,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 335 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 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) [2024-06-27 16:44:45,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:45,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 28 [2024-06-27 16:44:45,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:45,845 INFO L124 PetriNetUnfolderBase]: 418/789 cut-off events. [2024-06-27 16:44:45,846 INFO L125 PetriNetUnfolderBase]: For 2153/2153 co-relation queries the response was YES. [2024-06-27 16:44:45,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2945 conditions, 789 events. 418/789 cut-off events. For 2153/2153 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3397 event pairs, 23 based on Foata normal form. 24/751 useless extension candidates. Maximal degree in co-relation 1141. Up to 221 conditions per place. [2024-06-27 16:44:45,851 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 100 selfloop transitions, 24 changer transitions 0/131 dead transitions. [2024-06-27 16:44:45,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 131 transitions, 1146 flow [2024-06-27 16:44:45,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:44:45,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:44:45,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 16:44:45,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6825396825396826 [2024-06-27 16:44:45,853 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 335 flow. Second operand 9 states and 172 transitions. [2024-06-27 16:44:45,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 131 transitions, 1146 flow [2024-06-27 16:44:45,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 131 transitions, 1107 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-06-27 16:44:45,858 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 526 flow [2024-06-27 16:44:45,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=526, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-27 16:44:45,859 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 36 predicate places. [2024-06-27 16:44:45,859 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 526 flow [2024-06-27 16:44:45,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 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) [2024-06-27 16:44:45,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:45,860 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:45,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 16:44:46,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-06-27 16:44:46,074 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:46,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:46,074 INFO L85 PathProgramCache]: Analyzing trace with hash -709840238, now seen corresponding path program 2 times [2024-06-27 16:44:46,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:46,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951237129] [2024-06-27 16:44:46,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:46,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:46,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:46,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951237129] [2024-06-27 16:44:46,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951237129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:44:46,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:44:46,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:44:46,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194175957] [2024-06-27 16:44:46,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:44:46,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:44:46,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:46,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:44:46,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:44:46,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-06-27 16:44:46,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 526 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2024-06-27 16:44:46,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:46,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-06-27 16:44:46,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:46,317 INFO L124 PetriNetUnfolderBase]: 514/1106 cut-off events. [2024-06-27 16:44:46,318 INFO L125 PetriNetUnfolderBase]: For 4251/4319 co-relation queries the response was YES. [2024-06-27 16:44:46,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4491 conditions, 1106 events. 514/1106 cut-off events. For 4251/4319 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5945 event pairs, 96 based on Foata normal form. 24/990 useless extension candidates. Maximal degree in co-relation 2226. Up to 359 conditions per place. [2024-06-27 16:44:46,326 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 44 selfloop transitions, 28 changer transitions 0/95 dead transitions. [2024-06-27 16:44:46,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 95 transitions, 1006 flow [2024-06-27 16:44:46,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 16:44:46,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 16:44:46,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2024-06-27 16:44:46,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7053571428571429 [2024-06-27 16:44:46,328 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 526 flow. Second operand 4 states and 79 transitions. [2024-06-27 16:44:46,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 95 transitions, 1006 flow [2024-06-27 16:44:46,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 95 transitions, 986 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 16:44:46,338 INFO L231 Difference]: Finished difference. Result has 68 places, 74 transitions, 801 flow [2024-06-27 16:44:46,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=801, PETRI_PLACES=68, PETRI_TRANSITIONS=74} [2024-06-27 16:44:46,339 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 40 predicate places. [2024-06-27 16:44:46,339 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 74 transitions, 801 flow [2024-06-27 16:44:46,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2024-06-27 16:44:46,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:46,340 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:46,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 16:44:46,340 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:46,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:46,341 INFO L85 PathProgramCache]: Analyzing trace with hash -94886296, now seen corresponding path program 1 times [2024-06-27 16:44:46,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:46,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127186129] [2024-06-27 16:44:46,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:46,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:46,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:46,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127186129] [2024-06-27 16:44:46,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127186129] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:46,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950100804] [2024-06-27 16:44:46,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:46,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:46,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:46,612 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) [2024-06-27 16:44:46,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 16:44:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:46,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2024-06-27 16:44:46,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:46,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:47,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950100804] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:47,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:47,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 16 [2024-06-27 16:44:47,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617991046] [2024-06-27 16:44:47,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:47,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 16:44:47,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:47,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 16:44:47,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:44:47,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 28 [2024-06-27 16:44:47,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 74 transitions, 801 flow. Second operand has 17 states, 17 states have (on average 12.058823529411764) internal successors, (205), 17 states have internal predecessors, (205), 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) [2024-06-27 16:44:47,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:47,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 28 [2024-06-27 16:44:47,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:51,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 16:44:55,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.98s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 16:45:05,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 16:45:06,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 16:45:09,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 16:45:15,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 16:45:19,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 16:45:33,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 16:45:34,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 16:45:36,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 16:46:09,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 16:46:13,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 16:46:37,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.87s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 16:46:42,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 16:46:51,945 WARN L293 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 57 DAG size of output: 49 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 16:47:01,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 16:47:13,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 16:47:22,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 16:47:22,516 INFO L124 PetriNetUnfolderBase]: 3690/7043 cut-off events. [2024-06-27 16:47:22,517 INFO L125 PetriNetUnfolderBase]: For 36630/36630 co-relation queries the response was YES. [2024-06-27 16:47:22,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30072 conditions, 7043 events. 3690/7043 cut-off events. For 36630/36630 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 49597 event pairs, 166 based on Foata normal form. 350/7065 useless extension candidates. Maximal degree in co-relation 12614. Up to 1845 conditions per place. [2024-06-27 16:47:22,566 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 343 selfloop transitions, 224 changer transitions 0/576 dead transitions. [2024-06-27 16:47:22,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 576 transitions, 6695 flow [2024-06-27 16:47:22,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-06-27 16:47:22,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-06-27 16:47:22,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 753 transitions. [2024-06-27 16:47:22,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6403061224489796 [2024-06-27 16:47:22,570 INFO L175 Difference]: Start difference. First operand has 68 places, 74 transitions, 801 flow. Second operand 42 states and 753 transitions. [2024-06-27 16:47:22,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 576 transitions, 6695 flow [2024-06-27 16:47:22,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 576 transitions, 6695 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 16:47:22,612 INFO L231 Difference]: Finished difference. Result has 139 places, 318 transitions, 5251 flow [2024-06-27 16:47:22,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=5251, PETRI_PLACES=139, PETRI_TRANSITIONS=318} [2024-06-27 16:47:22,614 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 111 predicate places. [2024-06-27 16:47:22,614 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 318 transitions, 5251 flow [2024-06-27 16:47:22,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 12.058823529411764) internal successors, (205), 17 states have internal predecessors, (205), 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) [2024-06-27 16:47:22,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:22,615 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:22,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-06-27 16:47:22,815 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,SelfDestructingSolverStorable7 [2024-06-27 16:47:22,816 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:47:22,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:22,817 INFO L85 PathProgramCache]: Analyzing trace with hash -320247018, now seen corresponding path program 2 times [2024-06-27 16:47:22,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:22,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803883024] [2024-06-27 16:47:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:22,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:22,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:22,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803883024] [2024-06-27 16:47:22,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803883024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:47:22,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:47:22,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:47:22,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695494884] [2024-06-27 16:47:22,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:47:22,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:47:22,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:22,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:47:22,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:47:22,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-06-27 16:47:22,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 318 transitions, 5251 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2024-06-27 16:47:22,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:22,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-06-27 16:47:22,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:25,560 INFO L124 PetriNetUnfolderBase]: 7088/14880 cut-off events. [2024-06-27 16:47:25,561 INFO L125 PetriNetUnfolderBase]: For 240408/241070 co-relation queries the response was YES. [2024-06-27 16:47:25,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85735 conditions, 14880 events. 7088/14880 cut-off events. For 240408/241070 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 134680 event pairs, 1786 based on Foata normal form. 136/14070 useless extension candidates. Maximal degree in co-relation 76193. Up to 3810 conditions per place. [2024-06-27 16:47:25,722 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 515 selfloop transitions, 109 changer transitions 0/725 dead transitions. [2024-06-27 16:47:25,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 725 transitions, 13522 flow [2024-06-27 16:47:25,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 16:47:25,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 16:47:25,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-06-27 16:47:25,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-06-27 16:47:25,723 INFO L175 Difference]: Start difference. First operand has 139 places, 318 transitions, 5251 flow. Second operand 4 states and 84 transitions. [2024-06-27 16:47:25,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 725 transitions, 13522 flow [2024-06-27 16:47:26,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 725 transitions, 12850 flow, removed 327 selfloop flow, removed 3 redundant places. [2024-06-27 16:47:26,923 INFO L231 Difference]: Finished difference. Result has 142 places, 427 transitions, 6745 flow [2024-06-27 16:47:26,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4892, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=6745, PETRI_PLACES=142, PETRI_TRANSITIONS=427} [2024-06-27 16:47:26,925 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 114 predicate places. [2024-06-27 16:47:26,925 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 427 transitions, 6745 flow [2024-06-27 16:47:26,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2024-06-27 16:47:26,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:26,925 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:26,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 16:47:26,926 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:47:26,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:26,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1942950914, now seen corresponding path program 1 times [2024-06-27 16:47:26,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:26,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555960535] [2024-06-27 16:47:26,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:26,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:26,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:27,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:27,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555960535] [2024-06-27 16:47:27,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555960535] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:27,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677683907] [2024-06-27 16:47:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:27,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:27,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:27,149 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) [2024-06-27 16:47:27,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 16:47:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:27,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:47:27,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:27,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:27,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677683907] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:27,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:27,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2024-06-27 16:47:27,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345111834] [2024-06-27 16:47:27,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:27,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:47:27,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:27,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:47:27,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:47:27,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-06-27 16:47:27,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 427 transitions, 6745 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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) [2024-06-27 16:47:27,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:27,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-06-27 16:47:27,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:30,545 INFO L124 PetriNetUnfolderBase]: 8140/17476 cut-off events. [2024-06-27 16:47:30,545 INFO L125 PetriNetUnfolderBase]: For 301507/302149 co-relation queries the response was YES. [2024-06-27 16:47:30,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108017 conditions, 17476 events. 8140/17476 cut-off events. For 301507/302149 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 162809 event pairs, 1637 based on Foata normal form. 76/17217 useless extension candidates. Maximal degree in co-relation 95584. Up to 10322 conditions per place. [2024-06-27 16:47:30,693 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 592 selfloop transitions, 16 changer transitions 1/709 dead transitions. [2024-06-27 16:47:30,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 709 transitions, 12659 flow [2024-06-27 16:47:30,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:47:30,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:47:30,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-27 16:47:30,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2024-06-27 16:47:30,694 INFO L175 Difference]: Start difference. First operand has 142 places, 427 transitions, 6745 flow. Second operand 5 states and 110 transitions. [2024-06-27 16:47:30,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 709 transitions, 12659 flow [2024-06-27 16:47:32,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 709 transitions, 12644 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 16:47:32,571 INFO L231 Difference]: Finished difference. Result has 146 places, 438 transitions, 6835 flow [2024-06-27 16:47:32,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6738, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6835, PETRI_PLACES=146, PETRI_TRANSITIONS=438} [2024-06-27 16:47:32,572 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 118 predicate places. [2024-06-27 16:47:32,572 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 438 transitions, 6835 flow [2024-06-27 16:47:32,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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) [2024-06-27 16:47:32,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:32,573 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:32,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 16:47:32,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:32,784 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:47:32,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:32,784 INFO L85 PathProgramCache]: Analyzing trace with hash 540100974, now seen corresponding path program 2 times [2024-06-27 16:47:32,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:32,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82927764] [2024-06-27 16:47:32,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:32,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:32,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:32,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:32,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82927764] [2024-06-27 16:47:32,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82927764] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:32,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813245197] [2024-06-27 16:47:32,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:47:32,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:32,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:32,905 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) [2024-06-27 16:47:32,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 16:47:32,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:47:32,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:47:32,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:47:32,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:33,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:33,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813245197] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:33,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:33,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-06-27 16:47:33,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574169379] [2024-06-27 16:47:33,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:33,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:47:33,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:33,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:47:33,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-27 16:47:33,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-06-27 16:47:33,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 438 transitions, 6835 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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) [2024-06-27 16:47:33,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:33,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-06-27 16:47:33,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:38,114 INFO L124 PetriNetUnfolderBase]: 12860/27917 cut-off events. [2024-06-27 16:47:38,115 INFO L125 PetriNetUnfolderBase]: For 494054/495368 co-relation queries the response was YES. [2024-06-27 16:47:38,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180311 conditions, 27917 events. 12860/27917 cut-off events. For 494054/495368 co-relation queries the response was YES. Maximal size of possible extension queue 1129. Compared 276719 event pairs, 1938 based on Foata normal form. 174/27600 useless extension candidates. Maximal degree in co-relation 159033. Up to 9924 conditions per place. [2024-06-27 16:47:38,519 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 949 selfloop transitions, 31 changer transitions 1/1081 dead transitions. [2024-06-27 16:47:38,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 1081 transitions, 19730 flow [2024-06-27 16:47:38,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:47:38,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:47:38,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-27 16:47:38,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7976190476190477 [2024-06-27 16:47:38,522 INFO L175 Difference]: Start difference. First operand has 146 places, 438 transitions, 6835 flow. Second operand 6 states and 134 transitions. [2024-06-27 16:47:38,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 1081 transitions, 19730 flow [2024-06-27 16:47:42,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 1081 transitions, 19678 flow, removed 26 selfloop flow, removed 0 redundant places. [2024-06-27 16:47:42,686 INFO L231 Difference]: Finished difference. Result has 152 places, 453 transitions, 6963 flow [2024-06-27 16:47:42,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6813, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6963, PETRI_PLACES=152, PETRI_TRANSITIONS=453} [2024-06-27 16:47:42,687 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 124 predicate places. [2024-06-27 16:47:42,687 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 453 transitions, 6963 flow [2024-06-27 16:47:42,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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) [2024-06-27 16:47:42,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:42,688 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:42,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-06-27 16:47:42,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:42,898 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:47:42,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:42,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1294398260, now seen corresponding path program 3 times [2024-06-27 16:47:42,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:42,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180056469] [2024-06-27 16:47:42,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:42,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:43,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:43,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:43,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180056469] [2024-06-27 16:47:43,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180056469] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:43,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118291166] [2024-06-27 16:47:43,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:47:43,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:43,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:43,017 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) [2024-06-27 16:47:43,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 16:47:43,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:47:43,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:47:43,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:47:43,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:43,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:43,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118291166] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:43,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:43,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-06-27 16:47:43,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247833333] [2024-06-27 16:47:43,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:43,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:47:43,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:43,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:47:43,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-27 16:47:43,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-06-27 16:47:43,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 453 transitions, 6963 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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) [2024-06-27 16:47:43,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:43,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-06-27 16:47:43,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:49,804 INFO L124 PetriNetUnfolderBase]: 16047/35065 cut-off events. [2024-06-27 16:47:49,804 INFO L125 PetriNetUnfolderBase]: For 620367/621817 co-relation queries the response was YES. [2024-06-27 16:47:49,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228549 conditions, 35065 events. 16047/35065 cut-off events. For 620367/621817 co-relation queries the response was YES. Maximal size of possible extension queue 1460. Compared 360808 event pairs, 2292 based on Foata normal form. 161/34641 useless extension candidates. Maximal degree in co-relation 202377. Up to 20048 conditions per place. [2024-06-27 16:47:50,121 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 867 selfloop transitions, 23 changer transitions 1/991 dead transitions. [2024-06-27 16:47:50,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 991 transitions, 17890 flow [2024-06-27 16:47:50,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:47:50,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:47:50,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-27 16:47:50,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7797619047619048 [2024-06-27 16:47:50,122 INFO L175 Difference]: Start difference. First operand has 152 places, 453 transitions, 6963 flow. Second operand 6 states and 131 transitions. [2024-06-27 16:47:50,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 991 transitions, 17890 flow [2024-06-27 16:47:56,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 991 transitions, 17828 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-27 16:47:56,019 INFO L231 Difference]: Finished difference. Result has 158 places, 469 transitions, 7103 flow [2024-06-27 16:47:56,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6934, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7103, PETRI_PLACES=158, PETRI_TRANSITIONS=469} [2024-06-27 16:47:56,020 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 130 predicate places. [2024-06-27 16:47:56,020 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 469 transitions, 7103 flow [2024-06-27 16:47:56,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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) [2024-06-27 16:47:56,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:56,020 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:56,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 16:47:56,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-06-27 16:47:56,232 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:47:56,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:56,232 INFO L85 PathProgramCache]: Analyzing trace with hash -961476894, now seen corresponding path program 1 times [2024-06-27 16:47:56,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:56,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209335878] [2024-06-27 16:47:56,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:56,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:56,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:56,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:56,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:56,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209335878] [2024-06-27 16:47:56,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209335878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:47:56,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:47:56,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:47:56,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080665320] [2024-06-27 16:47:56,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:47:56,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:47:56,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:56,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:47:56,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:47:56,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-06-27 16:47:56,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 469 transitions, 7103 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2024-06-27 16:47:56,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:56,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-06-27 16:47:56,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:48:02,080 INFO L124 PetriNetUnfolderBase]: 14779/32349 cut-off events. [2024-06-27 16:48:02,081 INFO L125 PetriNetUnfolderBase]: For 571788/573116 co-relation queries the response was YES. [2024-06-27 16:48:02,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208009 conditions, 32349 events. 14779/32349 cut-off events. For 571788/573116 co-relation queries the response was YES. Maximal size of possible extension queue 1212. Compared 326437 event pairs, 2333 based on Foata normal form. 419/32361 useless extension candidates. Maximal degree in co-relation 185257. Up to 11936 conditions per place. [2024-06-27 16:48:02,475 INFO L140 encePairwiseOnDemand]: 26/28 looper letters, 398 selfloop transitions, 109 changer transitions 0/626 dead transitions. [2024-06-27 16:48:02,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 626 transitions, 10820 flow [2024-06-27 16:48:02,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 16:48:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 16:48:02,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2024-06-27 16:48:02,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2024-06-27 16:48:02,477 INFO L175 Difference]: Start difference. First operand has 158 places, 469 transitions, 7103 flow. Second operand 4 states and 80 transitions. [2024-06-27 16:48:02,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 626 transitions, 10820 flow [2024-06-27 16:48:07,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 626 transitions, 10798 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-06-27 16:48:07,487 INFO L231 Difference]: Finished difference. Result has 163 places, 417 transitions, 6701 flow [2024-06-27 16:48:07,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6366, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=6701, PETRI_PLACES=163, PETRI_TRANSITIONS=417} [2024-06-27 16:48:07,488 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 135 predicate places. [2024-06-27 16:48:07,488 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 417 transitions, 6701 flow [2024-06-27 16:48:07,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2024-06-27 16:48:07,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:48:07,488 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:48:07,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 16:48:07,488 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:48:07,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:48:07,489 INFO L85 PathProgramCache]: Analyzing trace with hash 143447874, now seen corresponding path program 4 times [2024-06-27 16:48:07,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:48:07,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061856255] [2024-06-27 16:48:07,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:48:07,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:48:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:48:07,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:48:07,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:48:07,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061856255] [2024-06-27 16:48:07,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061856255] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:48:07,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404084085] [2024-06-27 16:48:07,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:48:07,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:07,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:48:07,569 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:48:07,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 16:48:07,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:48:07,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:48:07,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:48:07,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:48:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:48:07,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:48:07,726 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:48:07,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404084085] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:48:07,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:48:07,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2024-06-27 16:48:07,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433469826] [2024-06-27 16:48:07,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:48:07,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:48:07,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:48:07,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:48:07,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:48:07,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-06-27 16:48:07,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 417 transitions, 6701 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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) [2024-06-27 16:48:07,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:48:07,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-06-27 16:48:07,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:48:13,707 INFO L124 PetriNetUnfolderBase]: 14814/33034 cut-off events. [2024-06-27 16:48:13,707 INFO L125 PetriNetUnfolderBase]: For 647044/648824 co-relation queries the response was YES. [2024-06-27 16:48:13,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226598 conditions, 33034 events. 14814/33034 cut-off events. For 647044/648824 co-relation queries the response was YES. Maximal size of possible extension queue 1334. Compared 339758 event pairs, 2157 based on Foata normal form. 178/32666 useless extension candidates. Maximal degree in co-relation 201784. Up to 21953 conditions per place. [2024-06-27 16:48:14,059 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 581 selfloop transitions, 23 changer transitions 1/706 dead transitions. [2024-06-27 16:48:14,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 706 transitions, 12945 flow [2024-06-27 16:48:14,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:48:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:48:14,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-06-27 16:48:14,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7785714285714286 [2024-06-27 16:48:14,060 INFO L175 Difference]: Start difference. First operand has 163 places, 417 transitions, 6701 flow. Second operand 5 states and 109 transitions. [2024-06-27 16:48:14,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 706 transitions, 12945 flow [2024-06-27 16:48:19,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 706 transitions, 12945 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 16:48:19,850 INFO L231 Difference]: Finished difference. Result has 170 places, 435 transitions, 6922 flow [2024-06-27 16:48:19,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6701, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6922, PETRI_PLACES=170, PETRI_TRANSITIONS=435} [2024-06-27 16:48:19,851 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 142 predicate places. [2024-06-27 16:48:19,851 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 435 transitions, 6922 flow [2024-06-27 16:48:19,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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) [2024-06-27 16:48:19,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:48:19,852 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:48:19,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-06-27 16:48:20,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:20,062 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:48:20,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:48:20,062 INFO L85 PathProgramCache]: Analyzing trace with hash 858904868, now seen corresponding path program 5 times [2024-06-27 16:48:20,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:48:20,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678267129] [2024-06-27 16:48:20,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:48:20,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:48:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:48:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:48:20,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:48:20,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678267129] [2024-06-27 16:48:20,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678267129] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:48:20,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114792820] [2024-06-27 16:48:20,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:48:20,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:20,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:48:20,152 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:48:20,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 16:48:20,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:48:20,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:48:20,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:48:20,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:48:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:48:20,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:48:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:48:20,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114792820] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:48:20,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:48:20,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2024-06-27 16:48:20,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118416284] [2024-06-27 16:48:20,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:48:20,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:48:20,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:48:20,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:48:20,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:48:20,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-06-27 16:48:20,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 435 transitions, 6922 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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) [2024-06-27 16:48:20,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:48:20,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-06-27 16:48:20,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:48:27,246 INFO L124 PetriNetUnfolderBase]: 16247/36226 cut-off events. [2024-06-27 16:48:27,246 INFO L125 PetriNetUnfolderBase]: For 727528/729864 co-relation queries the response was YES. [2024-06-27 16:48:27,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254701 conditions, 36226 events. 16247/36226 cut-off events. For 727528/729864 co-relation queries the response was YES. Maximal size of possible extension queue 1467. Compared 378080 event pairs, 2316 based on Foata normal form. 247/35873 useless extension candidates. Maximal degree in co-relation 226941. Up to 24386 conditions per place. [2024-06-27 16:48:27,636 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 599 selfloop transitions, 17 changer transitions 1/718 dead transitions. [2024-06-27 16:48:27,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 718 transitions, 13244 flow [2024-06-27 16:48:27,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:48:27,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:48:27,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-06-27 16:48:27,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7714285714285715 [2024-06-27 16:48:27,638 INFO L175 Difference]: Start difference. First operand has 170 places, 435 transitions, 6922 flow. Second operand 5 states and 108 transitions. [2024-06-27 16:48:27,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 718 transitions, 13244 flow [2024-06-27 16:48:34,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 718 transitions, 13236 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 16:48:34,476 INFO L231 Difference]: Finished difference. Result has 176 places, 441 transitions, 7022 flow [2024-06-27 16:48:34,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6914, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7022, PETRI_PLACES=176, PETRI_TRANSITIONS=441} [2024-06-27 16:48:34,478 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 148 predicate places. [2024-06-27 16:48:34,478 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 441 transitions, 7022 flow [2024-06-27 16:48:34,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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) [2024-06-27 16:48:34,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:48:34,478 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:48:34,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 16:48:34,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:34,684 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:48:34,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:48:34,685 INFO L85 PathProgramCache]: Analyzing trace with hash -419053620, now seen corresponding path program 6 times [2024-06-27 16:48:34,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:48:34,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491999676] [2024-06-27 16:48:34,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:48:34,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:48:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:48:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:48:34,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:48:34,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491999676] [2024-06-27 16:48:34,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491999676] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:48:34,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419282357] [2024-06-27 16:48:34,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:48:34,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:34,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:48:34,804 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:48:34,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 16:48:34,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:48:34,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:48:34,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:48:34,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:48:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:48:34,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:48:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:48:34,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419282357] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:48:34,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:48:34,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-06-27 16:48:34,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141228902] [2024-06-27 16:48:34,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:48:34,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:48:34,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:48:34,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:48:34,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-27 16:48:34,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 28 [2024-06-27 16:48:34,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 441 transitions, 7022 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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) [2024-06-27 16:48:34,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:48:34,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 28 [2024-06-27 16:48:34,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand