./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-queue-add-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/popl20-queue-add-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 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:05:27,577 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:05:27,612 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:05:27,615 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:05:27,616 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:05:27,629 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:05:27,630 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:05:27,630 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:05:27,630 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:05:27,631 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:05:27,631 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:05:27,631 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:05:27,632 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:05:27,632 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:05:27,632 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:05:27,632 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:05:27,633 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:05:27,633 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:05:27,633 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:05:27,633 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:05:27,634 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:05:27,634 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:05:27,634 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:05:27,634 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:05:27,635 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:05:27,635 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:05:27,635 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:05:27,635 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:05:27,635 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:05:27,636 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:05:27,636 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:05:27,636 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:05:27,636 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:05:27,636 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:05:27,637 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:05:27,637 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:05:27,637 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:05:27,637 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:05:27,637 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:05:27,638 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:05:27,638 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:05:27,638 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:05:27,638 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:05:27,638 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e [2024-06-27 17:05:27,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:05:27,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:05:27,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:05:27,893 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:05:27,893 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:05:27,894 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2024-06-27 17:05:28,856 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:05:29,032 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:05:29,033 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2024-06-27 17:05:29,039 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/774dea67c/d2369293094c4307bf2bc0c95773ed0c/FLAGe7158e113 [2024-06-27 17:05:29,048 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/774dea67c/d2369293094c4307bf2bc0c95773ed0c [2024-06-27 17:05:29,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:05:29,052 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 17:05:29,053 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:05:29,053 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:05:29,056 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:05:29,057 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:05:29" (1/1) ... [2024-06-27 17:05:29,057 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a3a3a56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:29, skipping insertion in model container [2024-06-27 17:05:29,058 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:05:29" (1/1) ... [2024-06-27 17:05:29,074 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:05:29,206 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/popl20-queue-add-2.wvr.c[2722,2735] [2024-06-27 17:05:29,213 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:05:29,219 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 17:05:29,233 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/popl20-queue-add-2.wvr.c[2722,2735] [2024-06-27 17:05:29,236 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:05:29,250 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:05:29,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:29 WrapperNode [2024-06-27 17:05:29,250 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:05:29,251 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:05:29,251 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:05:29,251 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:05:29,256 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:29" (1/1) ... [2024-06-27 17:05:29,261 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:29" (1/1) ... [2024-06-27 17:05:29,277 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 149 [2024-06-27 17:05:29,278 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:05:29,279 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:05:29,279 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:05:29,279 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:05:29,293 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:29" (1/1) ... [2024-06-27 17:05:29,293 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:29" (1/1) ... [2024-06-27 17:05:29,298 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:29" (1/1) ... [2024-06-27 17:05:29,309 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-06-27 17:05:29,310 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:29" (1/1) ... [2024-06-27 17:05:29,310 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:29" (1/1) ... [2024-06-27 17:05:29,314 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:29" (1/1) ... [2024-06-27 17:05:29,317 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:29" (1/1) ... [2024-06-27 17:05:29,318 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:29" (1/1) ... [2024-06-27 17:05:29,319 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:29" (1/1) ... [2024-06-27 17:05:29,321 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:05:29,321 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:05:29,321 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:05:29,322 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:05:29,322 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:29" (1/1) ... [2024-06-27 17:05:29,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:05:29,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:05:29,357 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 17:05:29,383 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 17:05:29,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:05:29,417 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 17:05:29,417 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 17:05:29,417 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 17:05:29,417 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 17:05:29,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:05:29,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 17:05:29,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 17:05:29,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 17:05:29,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:05:29,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:05:29,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 17:05:29,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:05:29,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:05:29,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 17:05:29,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 17:05:29,421 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 17:05:29,537 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:05:29,539 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:05:29,722 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:05:29,723 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:05:29,871 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:05:29,871 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-27 17:05:29,872 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:05:29 BoogieIcfgContainer [2024-06-27 17:05:29,872 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:05:29,873 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:05:29,873 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:05:29,876 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:05:29,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:05:29" (1/3) ... [2024-06-27 17:05:29,876 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ee06547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:05:29, skipping insertion in model container [2024-06-27 17:05:29,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:29" (2/3) ... [2024-06-27 17:05:29,877 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ee06547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:05:29, skipping insertion in model container [2024-06-27 17:05:29,877 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:05:29" (3/3) ... [2024-06-27 17:05:29,878 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2024-06-27 17:05:29,883 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 17:05:29,890 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:05:29,890 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 17:05:29,890 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:05:29,927 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 17:05:29,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 72 flow [2024-06-27 17:05:29,980 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2024-06-27 17:05:29,981 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:05:29,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 4/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-06-27 17:05:29,983 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 72 flow [2024-06-27 17:05:29,985 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 26 transitions, 64 flow [2024-06-27 17:05:29,991 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:05:29,998 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;@267c6c2e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:05:29,998 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 17:05:30,014 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:05:30,014 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2024-06-27 17:05:30,014 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:05:30,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:30,015 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 17:05:30,015 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 17:05:30,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:30,021 INFO L85 PathProgramCache]: Analyzing trace with hash 898408006, now seen corresponding path program 1 times [2024-06-27 17:05:30,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:30,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302142054] [2024-06-27 17:05:30,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:30,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:30,203 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 17:05:30,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:30,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302142054] [2024-06-27 17:05:30,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302142054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:05:30,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:05:30,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:05:30,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144652225] [2024-06-27 17:05:30,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:05:30,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-06-27 17:05:30,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:30,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-06-27 17:05:30,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-06-27 17:05:30,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-06-27 17:05:30,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 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 17:05:30,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:30,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-06-27 17:05:30,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:30,321 INFO L124 PetriNetUnfolderBase]: 87/187 cut-off events. [2024-06-27 17:05:30,321 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-06-27 17:05:30,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 187 events. 87/187 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 635 event pairs, 66 based on Foata normal form. 13/183 useless extension candidates. Maximal degree in co-relation 317. Up to 146 conditions per place. [2024-06-27 17:05:30,326 INFO L140 encePairwiseOnDemand]: 28/29 looper letters, 19 selfloop transitions, 0 changer transitions 0/25 dead transitions. [2024-06-27 17:05:30,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 25 transitions, 100 flow [2024-06-27 17:05:30,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-06-27 17:05:30,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-06-27 17:05:30,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 36 transitions. [2024-06-27 17:05:30,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2024-06-27 17:05:30,337 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 64 flow. Second operand 2 states and 36 transitions. [2024-06-27 17:05:30,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 25 transitions, 100 flow [2024-06-27 17:05:30,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 92 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:05:30,342 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 54 flow [2024-06-27 17:05:30,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=54, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2024-06-27 17:05:30,347 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2024-06-27 17:05:30,347 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 54 flow [2024-06-27 17:05:30,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 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 17:05:30,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:30,348 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] [2024-06-27 17:05:30,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:05:30,349 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 17:05:30,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:30,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1095861289, now seen corresponding path program 1 times [2024-06-27 17:05:30,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:30,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038600332] [2024-06-27 17:05:30,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:30,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:30,622 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 17:05:30,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:30,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038600332] [2024-06-27 17:05:30,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038600332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:05:30,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:05:30,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:05:30,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735357549] [2024-06-27 17:05:30,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:05:30,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:05:30,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:30,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:05:30,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:05:30,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-06-27 17:05:30,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 17:05:30,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:30,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-06-27 17:05:30,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:30,713 INFO L124 PetriNetUnfolderBase]: 100/227 cut-off events. [2024-06-27 17:05:30,713 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:05:30,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 227 events. 100/227 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 832 event pairs, 79 based on Foata normal form. 17/228 useless extension candidates. Maximal degree in co-relation 416. Up to 146 conditions per place. [2024-06-27 17:05:30,715 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 18 selfloop transitions, 2 changer transitions 8/34 dead transitions. [2024-06-27 17:05:30,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 130 flow [2024-06-27 17:05:30,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:05:30,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:05:30,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-06-27 17:05:30,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431034482758621 [2024-06-27 17:05:30,717 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 54 flow. Second operand 4 states and 63 transitions. [2024-06-27 17:05:30,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 130 flow [2024-06-27 17:05:30,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 34 transitions, 130 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 17:05:30,719 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 72 flow [2024-06-27 17:05:30,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2024-06-27 17:05:30,721 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2024-06-27 17:05:30,721 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 72 flow [2024-06-27 17:05:30,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 17:05:30,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:30,722 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 17:05:30,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:05:30,722 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 17:05:30,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:30,724 INFO L85 PathProgramCache]: Analyzing trace with hash -798163703, now seen corresponding path program 1 times [2024-06-27 17:05:30,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:30,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904743287] [2024-06-27 17:05:30,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:30,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:05:30,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:30,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904743287] [2024-06-27 17:05:30,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904743287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:05:30,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:05:30,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:05:30,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145432755] [2024-06-27 17:05:30,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:05:30,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:05:30,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:30,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:05:30,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:05:30,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 17:05:30,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 72 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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 17:05:30,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:30,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 17:05:30,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:31,074 INFO L124 PetriNetUnfolderBase]: 229/444 cut-off events. [2024-06-27 17:05:31,076 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-06-27 17:05:31,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 967 conditions, 444 events. 229/444 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1986 event pairs, 54 based on Foata normal form. 1/441 useless extension candidates. Maximal degree in co-relation 961. Up to 155 conditions per place. [2024-06-27 17:05:31,082 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 46 selfloop transitions, 9 changer transitions 7/66 dead transitions. [2024-06-27 17:05:31,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 66 transitions, 303 flow [2024-06-27 17:05:31,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:05:31,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:05:31,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 110 transitions. [2024-06-27 17:05:31,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47413793103448276 [2024-06-27 17:05:31,087 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 72 flow. Second operand 8 states and 110 transitions. [2024-06-27 17:05:31,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 66 transitions, 303 flow [2024-06-27 17:05:31,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 66 transitions, 299 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 17:05:31,092 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 126 flow [2024-06-27 17:05:31,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=126, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2024-06-27 17:05:31,093 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 11 predicate places. [2024-06-27 17:05:31,093 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 126 flow [2024-06-27 17:05:31,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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 17:05:31,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:31,094 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 17:05:31,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:05:31,094 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 17:05:31,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:31,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1929446763, now seen corresponding path program 2 times [2024-06-27 17:05:31,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:31,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925934441] [2024-06-27 17:05:31,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:31,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:05:31,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:31,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925934441] [2024-06-27 17:05:31,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925934441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:05:31,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:05:31,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:05:31,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109073854] [2024-06-27 17:05:31,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:05:31,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:05:31,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:31,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:05:31,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:05:31,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-06-27 17:05:31,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 17:05:31,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:31,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-06-27 17:05:31,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:31,244 INFO L124 PetriNetUnfolderBase]: 145/326 cut-off events. [2024-06-27 17:05:31,245 INFO L125 PetriNetUnfolderBase]: For 182/186 co-relation queries the response was YES. [2024-06-27 17:05:31,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 326 events. 145/326 cut-off events. For 182/186 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1327 event pairs, 39 based on Foata normal form. 6/328 useless extension candidates. Maximal degree in co-relation 815. Up to 214 conditions per place. [2024-06-27 17:05:31,247 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 26 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2024-06-27 17:05:31,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 197 flow [2024-06-27 17:05:31,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:05:31,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:05:31,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2024-06-27 17:05:31,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2024-06-27 17:05:31,251 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 126 flow. Second operand 3 states and 51 transitions. [2024-06-27 17:05:31,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 197 flow [2024-06-27 17:05:31,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 187 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 17:05:31,254 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 135 flow [2024-06-27 17:05:31,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2024-06-27 17:05:31,256 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2024-06-27 17:05:31,256 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 135 flow [2024-06-27 17:05:31,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 17:05:31,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:31,257 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, 1, 1, 1] [2024-06-27 17:05:31,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:05:31,257 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 17:05:31,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:31,258 INFO L85 PathProgramCache]: Analyzing trace with hash -126642015, now seen corresponding path program 1 times [2024-06-27 17:05:31,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:31,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427883427] [2024-06-27 17:05:31,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:31,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:31,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:31,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:31,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427883427] [2024-06-27 17:05:31,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427883427] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:05:31,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245098194] [2024-06-27 17:05:31,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:31,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:31,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:05:31,391 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 17:05:31,393 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 17:05:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:31,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:05:31,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:05:31,542 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 17:05:31,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:05:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:31,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245098194] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:05:31,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:05:31,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-06-27 17:05:31,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798054666] [2024-06-27 17:05:31,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:05:31,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:05:31,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:31,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:05:31,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:05:31,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-06-27 17:05:31,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 135 flow. Second operand has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 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 17:05:31,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:31,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-06-27 17:05:31,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:31,749 INFO L124 PetriNetUnfolderBase]: 244/562 cut-off events. [2024-06-27 17:05:31,749 INFO L125 PetriNetUnfolderBase]: For 558/597 co-relation queries the response was YES. [2024-06-27 17:05:31,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1515 conditions, 562 events. 244/562 cut-off events. For 558/597 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2830 event pairs, 137 based on Foata normal form. 26/560 useless extension candidates. Maximal degree in co-relation 1505. Up to 262 conditions per place. [2024-06-27 17:05:31,753 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 41 selfloop transitions, 5 changer transitions 4/59 dead transitions. [2024-06-27 17:05:31,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 59 transitions, 327 flow [2024-06-27 17:05:31,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:05:31,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:05:31,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-27 17:05:31,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5344827586206896 [2024-06-27 17:05:31,756 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 135 flow. Second operand 6 states and 93 transitions. [2024-06-27 17:05:31,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 59 transitions, 327 flow [2024-06-27 17:05:31,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 59 transitions, 306 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-27 17:05:31,758 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 163 flow [2024-06-27 17:05:31,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2024-06-27 17:05:31,759 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2024-06-27 17:05:31,759 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 163 flow [2024-06-27 17:05:31,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 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 17:05:31,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:31,759 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:05:31,772 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 17:05:31,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:31,972 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 17:05:31,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:31,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1356069503, now seen corresponding path program 2 times [2024-06-27 17:05:31,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:31,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894993414] [2024-06-27 17:05:31,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:31,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:32,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:32,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894993414] [2024-06-27 17:05:32,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894993414] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:05:32,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531327209] [2024-06-27 17:05:32,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:05:32,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:32,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:05:32,380 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 17:05:32,382 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 17:05:32,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:05:32,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:05:32,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 17:05:32,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:05:32,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-06-27 17:05:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:32,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:05:32,812 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:05:32,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-06-27 17:05:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:32,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531327209] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:05:32,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:05:32,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 21 [2024-06-27 17:05:32,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963182602] [2024-06-27 17:05:32,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:05:32,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 17:05:32,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:32,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 17:05:32,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2024-06-27 17:05:32,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 17:05:32,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 163 flow. Second operand has 22 states, 22 states have (on average 8.5) internal successors, (187), 22 states have internal predecessors, (187), 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 17:05:32,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:32,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 17:05:32,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:33,959 INFO L124 PetriNetUnfolderBase]: 745/1590 cut-off events. [2024-06-27 17:05:33,960 INFO L125 PetriNetUnfolderBase]: For 1144/1147 co-relation queries the response was YES. [2024-06-27 17:05:33,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4054 conditions, 1590 events. 745/1590 cut-off events. For 1144/1147 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9480 event pairs, 65 based on Foata normal form. 78/1662 useless extension candidates. Maximal degree in co-relation 4042. Up to 294 conditions per place. [2024-06-27 17:05:33,971 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 157 selfloop transitions, 39 changer transitions 16/219 dead transitions. [2024-06-27 17:05:33,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 219 transitions, 1224 flow [2024-06-27 17:05:33,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 17:05:33,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 17:05:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 391 transitions. [2024-06-27 17:05:33,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4815270935960591 [2024-06-27 17:05:33,975 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 163 flow. Second operand 28 states and 391 transitions. [2024-06-27 17:05:33,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 219 transitions, 1224 flow [2024-06-27 17:05:33,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 219 transitions, 1173 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 17:05:33,984 INFO L231 Difference]: Finished difference. Result has 81 places, 74 transitions, 504 flow [2024-06-27 17:05:33,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=504, PETRI_PLACES=81, PETRI_TRANSITIONS=74} [2024-06-27 17:05:33,987 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 52 predicate places. [2024-06-27 17:05:33,987 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 74 transitions, 504 flow [2024-06-27 17:05:33,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.5) internal successors, (187), 22 states have internal predecessors, (187), 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 17:05:33,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:33,988 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:05:34,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 17:05:34,202 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,SelfDestructingSolverStorable5 [2024-06-27 17:05:34,203 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 17:05:34,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:34,203 INFO L85 PathProgramCache]: Analyzing trace with hash -623450337, now seen corresponding path program 1 times [2024-06-27 17:05:34,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:34,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661973685] [2024-06-27 17:05:34,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:34,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:34,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:34,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661973685] [2024-06-27 17:05:34,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661973685] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:05:34,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488537312] [2024-06-27 17:05:34,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:34,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:34,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:05:34,348 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 17:05:34,352 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 17:05:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:34,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2024-06-27 17:05:34,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:05:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:05:34,443 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 17:05:34,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488537312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:05:34,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 17:05:34,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-06-27 17:05:34,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277329233] [2024-06-27 17:05:34,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:05:34,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:05:34,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:34,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:05:34,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:05:34,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-06-27 17:05:34,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 74 transitions, 504 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 17:05:34,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:34,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-06-27 17:05:34,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:34,623 INFO L124 PetriNetUnfolderBase]: 599/1528 cut-off events. [2024-06-27 17:05:34,623 INFO L125 PetriNetUnfolderBase]: For 5891/5974 co-relation queries the response was YES. [2024-06-27 17:05:34,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4832 conditions, 1528 events. 599/1528 cut-off events. For 5891/5974 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 10262 event pairs, 150 based on Foata normal form. 39/1529 useless extension candidates. Maximal degree in co-relation 4809. Up to 609 conditions per place. [2024-06-27 17:05:34,633 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 63 selfloop transitions, 16 changer transitions 8/102 dead transitions. [2024-06-27 17:05:34,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 102 transitions, 837 flow [2024-06-27 17:05:34,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:05:34,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:05:34,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2024-06-27 17:05:34,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6810344827586207 [2024-06-27 17:05:34,634 INFO L175 Difference]: Start difference. First operand has 81 places, 74 transitions, 504 flow. Second operand 4 states and 79 transitions. [2024-06-27 17:05:34,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 102 transitions, 837 flow [2024-06-27 17:05:34,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 102 transitions, 698 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-27 17:05:34,647 INFO L231 Difference]: Finished difference. Result has 77 places, 71 transitions, 489 flow [2024-06-27 17:05:34,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=489, PETRI_PLACES=77, PETRI_TRANSITIONS=71} [2024-06-27 17:05:34,648 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 48 predicate places. [2024-06-27 17:05:34,648 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 71 transitions, 489 flow [2024-06-27 17:05:34,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 17:05:34,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:34,648 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:05:34,664 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 17:05:34,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:34,865 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 17:05:34,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:34,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1175512711, now seen corresponding path program 3 times [2024-06-27 17:05:34,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:34,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498030021] [2024-06-27 17:05:34,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:34,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:35,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:35,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:35,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498030021] [2024-06-27 17:05:35,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498030021] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:05:35,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415935371] [2024-06-27 17:05:35,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:05:35,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:35,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:05:35,190 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 17:05:35,220 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 17:05:35,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:05:35,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:05:35,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 17:05:35,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:05:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:35,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:05:35,525 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:05:35,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-06-27 17:05:35,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:35,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415935371] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:05:35,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:05:35,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-06-27 17:05:35,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047790853] [2024-06-27 17:05:35,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:05:35,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 17:05:35,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:35,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 17:05:35,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2024-06-27 17:05:35,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 17:05:35,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 489 flow. Second operand has 22 states, 22 states have (on average 8.454545454545455) internal successors, (186), 22 states have internal predecessors, (186), 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 17:05:35,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:35,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 17:05:35,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:36,470 INFO L124 PetriNetUnfolderBase]: 1228/2529 cut-off events. [2024-06-27 17:05:36,470 INFO L125 PetriNetUnfolderBase]: For 13199/13199 co-relation queries the response was YES. [2024-06-27 17:05:36,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8764 conditions, 2529 events. 1228/2529 cut-off events. For 13199/13199 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 16215 event pairs, 120 based on Foata normal form. 93/2605 useless extension candidates. Maximal degree in co-relation 8743. Up to 546 conditions per place. [2024-06-27 17:05:36,483 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 142 selfloop transitions, 62 changer transitions 1/211 dead transitions. [2024-06-27 17:05:36,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 211 transitions, 1889 flow [2024-06-27 17:05:36,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 17:05:36,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 17:05:36,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 282 transitions. [2024-06-27 17:05:36,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4862068965517241 [2024-06-27 17:05:36,485 INFO L175 Difference]: Start difference. First operand has 77 places, 71 transitions, 489 flow. Second operand 20 states and 282 transitions. [2024-06-27 17:05:36,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 211 transitions, 1889 flow [2024-06-27 17:05:36,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 211 transitions, 1647 flow, removed 121 selfloop flow, removed 3 redundant places. [2024-06-27 17:05:36,504 INFO L231 Difference]: Finished difference. Result has 97 places, 103 transitions, 1020 flow [2024-06-27 17:05:36,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1020, PETRI_PLACES=97, PETRI_TRANSITIONS=103} [2024-06-27 17:05:36,505 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 68 predicate places. [2024-06-27 17:05:36,505 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 103 transitions, 1020 flow [2024-06-27 17:05:36,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.454545454545455) internal successors, (186), 22 states have internal predecessors, (186), 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 17:05:36,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:36,506 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:05:36,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 17:05:36,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:36,732 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 17:05:36,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:36,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1810261713, now seen corresponding path program 4 times [2024-06-27 17:05:36,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:36,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478614576] [2024-06-27 17:05:36,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:36,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:37,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:37,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478614576] [2024-06-27 17:05:37,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478614576] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:05:37,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756227393] [2024-06-27 17:05:37,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:05:37,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:37,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:05:37,440 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 17:05:37,472 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 17:05:37,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:05:37,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:05:37,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 17:05:37,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:05:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:05:37,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:05:37,645 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:05:37,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-06-27 17:05:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 17:05:37,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756227393] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:05:37,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:05:37,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 4] total 15 [2024-06-27 17:05:37,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984370163] [2024-06-27 17:05:37,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:05:37,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 17:05:37,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:37,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 17:05:37,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-06-27 17:05:37,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 17:05:37,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 103 transitions, 1020 flow. Second operand has 16 states, 16 states have (on average 8.8125) internal successors, (141), 16 states have internal predecessors, (141), 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 17:05:37,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:37,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 17:05:37,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:38,220 INFO L124 PetriNetUnfolderBase]: 1366/2825 cut-off events. [2024-06-27 17:05:38,220 INFO L125 PetriNetUnfolderBase]: For 21530/21530 co-relation queries the response was YES. [2024-06-27 17:05:38,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11364 conditions, 2825 events. 1366/2825 cut-off events. For 21530/21530 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 18335 event pairs, 181 based on Foata normal form. 56/2878 useless extension candidates. Maximal degree in co-relation 11335. Up to 940 conditions per place. [2024-06-27 17:05:38,238 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 122 selfloop transitions, 51 changer transitions 0/179 dead transitions. [2024-06-27 17:05:38,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 179 transitions, 2067 flow [2024-06-27 17:05:38,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 17:05:38,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 17:05:38,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 163 transitions. [2024-06-27 17:05:38,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4323607427055703 [2024-06-27 17:05:38,240 INFO L175 Difference]: Start difference. First operand has 97 places, 103 transitions, 1020 flow. Second operand 13 states and 163 transitions. [2024-06-27 17:05:38,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 179 transitions, 2067 flow [2024-06-27 17:05:38,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 179 transitions, 1821 flow, removed 113 selfloop flow, removed 8 redundant places. [2024-06-27 17:05:38,280 INFO L231 Difference]: Finished difference. Result has 101 places, 112 transitions, 1075 flow [2024-06-27 17:05:38,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1075, PETRI_PLACES=101, PETRI_TRANSITIONS=112} [2024-06-27 17:05:38,281 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 72 predicate places. [2024-06-27 17:05:38,281 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 112 transitions, 1075 flow [2024-06-27 17:05:38,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.8125) internal successors, (141), 16 states have internal predecessors, (141), 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 17:05:38,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:38,282 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 17:05:38,298 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 17:05:38,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:38,500 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 17:05:38,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:38,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1600182161, now seen corresponding path program 1 times [2024-06-27 17:05:38,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:38,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179140192] [2024-06-27 17:05:38,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:38,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:39,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:39,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179140192] [2024-06-27 17:05:39,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179140192] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:05:39,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472695132] [2024-06-27 17:05:39,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:39,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:39,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:05:39,022 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 17:05:39,040 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 17:05:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:39,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2024-06-27 17:05:39,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:05:39,544 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-06-27 17:05:39,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2024-06-27 17:05:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:39,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:05:39,859 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:05:39,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-06-27 17:05:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:40,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472695132] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:05:40,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:05:40,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-06-27 17:05:40,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997664543] [2024-06-27 17:05:40,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:05:40,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-06-27 17:05:40,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:40,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-06-27 17:05:40,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1465, Unknown=0, NotChecked=0, Total=1640 [2024-06-27 17:05:40,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-06-27 17:05:40,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 112 transitions, 1075 flow. Second operand has 41 states, 41 states have (on average 5.829268292682927) internal successors, (239), 41 states have internal predecessors, (239), 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 17:05:40,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:40,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-06-27 17:05:40,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:44,116 INFO L124 PetriNetUnfolderBase]: 3311/6201 cut-off events. [2024-06-27 17:05:44,116 INFO L125 PetriNetUnfolderBase]: For 42325/42325 co-relation queries the response was YES. [2024-06-27 17:05:44,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24742 conditions, 6201 events. 3311/6201 cut-off events. For 42325/42325 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 40877 event pairs, 303 based on Foata normal form. 7/6208 useless extension candidates. Maximal degree in co-relation 24713. Up to 2249 conditions per place. [2024-06-27 17:05:44,150 INFO L140 encePairwiseOnDemand]: 15/29 looper letters, 291 selfloop transitions, 183 changer transitions 63/539 dead transitions. [2024-06-27 17:05:44,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 539 transitions, 4983 flow [2024-06-27 17:05:44,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-06-27 17:05:44,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-06-27 17:05:44,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 615 transitions. [2024-06-27 17:05:44,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33135775862068967 [2024-06-27 17:05:44,153 INFO L175 Difference]: Start difference. First operand has 101 places, 112 transitions, 1075 flow. Second operand 64 states and 615 transitions. [2024-06-27 17:05:44,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 539 transitions, 4983 flow [2024-06-27 17:05:44,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 539 transitions, 4969 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 17:05:44,328 INFO L231 Difference]: Finished difference. Result has 186 places, 267 transitions, 3114 flow [2024-06-27 17:05:44,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1061, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=3114, PETRI_PLACES=186, PETRI_TRANSITIONS=267} [2024-06-27 17:05:44,329 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 157 predicate places. [2024-06-27 17:05:44,329 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 267 transitions, 3114 flow [2024-06-27 17:05:44,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.829268292682927) internal successors, (239), 41 states have internal predecessors, (239), 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 17:05:44,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:44,330 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 17:05:44,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-27 17:05:44,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:44,536 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 17:05:44,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:44,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1183298053, now seen corresponding path program 2 times [2024-06-27 17:05:44,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:44,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263093193] [2024-06-27 17:05:44,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:44,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:45,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:45,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263093193] [2024-06-27 17:05:45,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263093193] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:05:45,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874441640] [2024-06-27 17:05:45,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:05:45,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:45,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:05:45,024 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 17:05:45,039 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 17:05:45,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:05:45,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:05:45,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 17:05:45,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:05:45,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2024-06-27 17:05:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:45,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:05:45,718 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:05:45,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-06-27 17:05:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:45,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874441640] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:05:45,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:05:45,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-06-27 17:05:45,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796978671] [2024-06-27 17:05:45,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:05:45,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-06-27 17:05:45,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:45,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-06-27 17:05:45,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1423, Unknown=0, NotChecked=0, Total=1640 [2024-06-27 17:05:46,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-06-27 17:05:46,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 267 transitions, 3114 flow. Second operand has 41 states, 41 states have (on average 5.804878048780488) internal successors, (238), 41 states have internal predecessors, (238), 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 17:05:46,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:46,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-06-27 17:05:46,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:50,410 INFO L124 PetriNetUnfolderBase]: 4293/8117 cut-off events. [2024-06-27 17:05:50,410 INFO L125 PetriNetUnfolderBase]: For 92982/92982 co-relation queries the response was YES. [2024-06-27 17:05:50,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41512 conditions, 8117 events. 4293/8117 cut-off events. For 92982/92982 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 58215 event pairs, 262 based on Foata normal form. 4/8121 useless extension candidates. Maximal degree in co-relation 41456. Up to 2373 conditions per place. [2024-06-27 17:05:50,540 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 284 selfloop transitions, 504 changer transitions 65/855 dead transitions. [2024-06-27 17:05:50,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 855 transitions, 10586 flow [2024-06-27 17:05:50,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-06-27 17:05:50,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2024-06-27 17:05:50,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 659 transitions. [2024-06-27 17:05:50,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3341784989858012 [2024-06-27 17:05:50,545 INFO L175 Difference]: Start difference. First operand has 186 places, 267 transitions, 3114 flow. Second operand 68 states and 659 transitions. [2024-06-27 17:05:50,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 855 transitions, 10586 flow [2024-06-27 17:05:50,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 855 transitions, 10096 flow, removed 232 selfloop flow, removed 10 redundant places. [2024-06-27 17:05:50,791 INFO L231 Difference]: Finished difference. Result has 257 places, 609 transitions, 8727 flow [2024-06-27 17:05:50,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2843, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=8727, PETRI_PLACES=257, PETRI_TRANSITIONS=609} [2024-06-27 17:05:50,792 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 228 predicate places. [2024-06-27 17:05:50,793 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 609 transitions, 8727 flow [2024-06-27 17:05:50,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.804878048780488) internal successors, (238), 41 states have internal predecessors, (238), 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 17:05:50,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:50,793 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 17:05:50,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-06-27 17:05:50,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:50,996 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 17:05:50,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:50,997 INFO L85 PathProgramCache]: Analyzing trace with hash -166545805, now seen corresponding path program 3 times [2024-06-27 17:05:50,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:50,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24079769] [2024-06-27 17:05:50,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:50,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:51,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:51,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24079769] [2024-06-27 17:05:51,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24079769] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:05:51,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011240181] [2024-06-27 17:05:51,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:05:51,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:51,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:05:51,548 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 17:05:51,582 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 17:05:51,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:05:51,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:05:51,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 38 conjunts are in the unsatisfiable core [2024-06-27 17:05:51,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:05:51,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-06-27 17:05:52,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:52,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:05:52,252 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:05:52,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-06-27 17:05:52,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:52,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011240181] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:05:52,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:05:52,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2024-06-27 17:05:52,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959530890] [2024-06-27 17:05:52,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:05:52,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-06-27 17:05:52,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:52,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-06-27 17:05:52,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1489, Unknown=0, NotChecked=0, Total=1722 [2024-06-27 17:05:52,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-06-27 17:05:52,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 609 transitions, 8727 flow. Second operand has 42 states, 42 states have (on average 5.785714285714286) internal successors, (243), 42 states have internal predecessors, (243), 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 17:05:52,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:52,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-06-27 17:05:52,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:57,119 INFO L124 PetriNetUnfolderBase]: 4373/8293 cut-off events. [2024-06-27 17:05:57,119 INFO L125 PetriNetUnfolderBase]: For 144537/144537 co-relation queries the response was YES. [2024-06-27 17:05:57,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51605 conditions, 8293 events. 4373/8293 cut-off events. For 144537/144537 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 59708 event pairs, 349 based on Foata normal form. 4/8291 useless extension candidates. Maximal degree in co-relation 51529. Up to 3868 conditions per place. [2024-06-27 17:05:57,179 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 305 selfloop transitions, 527 changer transitions 66/900 dead transitions. [2024-06-27 17:05:57,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 900 transitions, 13380 flow [2024-06-27 17:05:57,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-06-27 17:05:57,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2024-06-27 17:05:57,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 573 transitions. [2024-06-27 17:05:57,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.323911814584511 [2024-06-27 17:05:57,182 INFO L175 Difference]: Start difference. First operand has 257 places, 609 transitions, 8727 flow. Second operand 61 states and 573 transitions. [2024-06-27 17:05:57,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 900 transitions, 13380 flow [2024-06-27 17:05:57,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 900 transitions, 12668 flow, removed 313 selfloop flow, removed 24 redundant places. [2024-06-27 17:05:57,960 INFO L231 Difference]: Finished difference. Result has 305 places, 704 transitions, 11515 flow [2024-06-27 17:05:57,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=8160, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=421, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=11515, PETRI_PLACES=305, PETRI_TRANSITIONS=704} [2024-06-27 17:05:57,961 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 276 predicate places. [2024-06-27 17:05:57,961 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 704 transitions, 11515 flow [2024-06-27 17:05:57,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.785714285714286) internal successors, (243), 42 states have internal predecessors, (243), 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 17:05:57,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:57,961 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 17:05:57,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 17:05:58,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-06-27 17:05:58,168 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 17:05:58,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:58,169 INFO L85 PathProgramCache]: Analyzing trace with hash 765896801, now seen corresponding path program 4 times [2024-06-27 17:05:58,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:58,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721180635] [2024-06-27 17:05:58,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:58,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:58,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:58,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:58,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721180635] [2024-06-27 17:05:58,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721180635] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:05:58,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721108485] [2024-06-27 17:05:58,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:05:58,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:58,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:05:58,654 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:05:58,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 17:05:58,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:05:58,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:05:58,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 32 conjunts are in the unsatisfiable core [2024-06-27 17:05:58,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:05:58,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-06-27 17:05:59,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:59,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:05:59,292 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:05:59,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-06-27 17:05:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:59,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721108485] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:05:59,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:05:59,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2024-06-27 17:05:59,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521940057] [2024-06-27 17:05:59,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:05:59,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-06-27 17:05:59,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:59,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-06-27 17:05:59,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2024-06-27 17:05:59,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-06-27 17:05:59,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 704 transitions, 11515 flow. Second operand has 42 states, 42 states have (on average 5.738095238095238) internal successors, (241), 42 states have internal predecessors, (241), 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 17:05:59,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:59,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-06-27 17:05:59,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:06:03,106 INFO L124 PetriNetUnfolderBase]: 4379/8261 cut-off events. [2024-06-27 17:06:03,106 INFO L125 PetriNetUnfolderBase]: For 164170/164170 co-relation queries the response was YES. [2024-06-27 17:06:03,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56445 conditions, 8261 events. 4379/8261 cut-off events. For 164170/164170 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 59152 event pairs, 427 based on Foata normal form. 5/8266 useless extension candidates. Maximal degree in co-relation 56358. Up to 4128 conditions per place. [2024-06-27 17:06:03,172 INFO L140 encePairwiseOnDemand]: 15/29 looper letters, 382 selfloop transitions, 429 changer transitions 58/871 dead transitions. [2024-06-27 17:06:03,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 871 transitions, 15007 flow [2024-06-27 17:06:03,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-06-27 17:06:03,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-06-27 17:06:03,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 348 transitions. [2024-06-27 17:06:03,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3157894736842105 [2024-06-27 17:06:03,174 INFO L175 Difference]: Start difference. First operand has 305 places, 704 transitions, 11515 flow. Second operand 38 states and 348 transitions. [2024-06-27 17:06:03,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 871 transitions, 15007 flow [2024-06-27 17:06:04,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 871 transitions, 14682 flow, removed 119 selfloop flow, removed 25 redundant places. [2024-06-27 17:06:04,077 INFO L231 Difference]: Finished difference. Result has 311 places, 724 transitions, 13277 flow [2024-06-27 17:06:04,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=11219, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=13277, PETRI_PLACES=311, PETRI_TRANSITIONS=724} [2024-06-27 17:06:04,078 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 282 predicate places. [2024-06-27 17:06:04,078 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 724 transitions, 13277 flow [2024-06-27 17:06:04,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.738095238095238) internal successors, (241), 42 states have internal predecessors, (241), 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 17:06:04,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:06:04,078 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 17:06:04,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-06-27 17:06:04,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-06-27 17:06:04,279 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 17:06:04,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:06:04,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1194612045, now seen corresponding path program 5 times [2024-06-27 17:06:04,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:06:04,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838630997] [2024-06-27 17:06:04,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:06:04,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:06:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:06:05,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:05,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:06:05,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838630997] [2024-06-27 17:06:05,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838630997] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:06:05,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602399249] [2024-06-27 17:06:05,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:06:05,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:05,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:06:05,013 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:06:05,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 17:06:05,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 17:06:05,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:06:05,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 17:06:05,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:06:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:06:05,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:06:05,489 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:06:05,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-06-27 17:06:05,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 17:06:05,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602399249] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:06:05,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:06:05,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 10] total 34 [2024-06-27 17:06:05,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285355459] [2024-06-27 17:06:05,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:06:05,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-06-27 17:06:05,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:06:05,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-06-27 17:06:05,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2024-06-27 17:06:05,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-06-27 17:06:05,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 724 transitions, 13277 flow. Second operand has 35 states, 35 states have (on average 5.914285714285715) internal successors, (207), 35 states have internal predecessors, (207), 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 17:06:05,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:06:05,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-06-27 17:06:05,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:06:08,631 INFO L124 PetriNetUnfolderBase]: 4453/8356 cut-off events. [2024-06-27 17:06:08,631 INFO L125 PetriNetUnfolderBase]: For 200002/200002 co-relation queries the response was YES. [2024-06-27 17:06:08,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62839 conditions, 8356 events. 4453/8356 cut-off events. For 200002/200002 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 59698 event pairs, 434 based on Foata normal form. 1/8357 useless extension candidates. Maximal degree in co-relation 62748. Up to 3836 conditions per place. [2024-06-27 17:06:08,715 INFO L140 encePairwiseOnDemand]: 16/29 looper letters, 453 selfloop transitions, 423 changer transitions 26/904 dead transitions. [2024-06-27 17:06:08,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 904 transitions, 17232 flow [2024-06-27 17:06:08,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 17:06:08,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 17:06:08,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 284 transitions. [2024-06-27 17:06:08,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3497536945812808 [2024-06-27 17:06:08,717 INFO L175 Difference]: Start difference. First operand has 311 places, 724 transitions, 13277 flow. Second operand 28 states and 284 transitions. [2024-06-27 17:06:08,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 904 transitions, 17232 flow [2024-06-27 17:06:09,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 904 transitions, 16926 flow, removed 117 selfloop flow, removed 22 redundant places. [2024-06-27 17:06:09,944 INFO L231 Difference]: Finished difference. Result has 310 places, 757 transitions, 14932 flow [2024-06-27 17:06:09,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=13034, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=389, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=14932, PETRI_PLACES=310, PETRI_TRANSITIONS=757} [2024-06-27 17:06:09,945 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 281 predicate places. [2024-06-27 17:06:09,945 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 757 transitions, 14932 flow [2024-06-27 17:06:09,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.914285714285715) internal successors, (207), 35 states have internal predecessors, (207), 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 17:06:09,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:06:09,946 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 17:06:09,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-27 17:06:10,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-06-27 17:06:10,146 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 17:06:10,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:06:10,147 INFO L85 PathProgramCache]: Analyzing trace with hash 467599359, now seen corresponding path program 6 times [2024-06-27 17:06:10,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:06:10,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612981637] [2024-06-27 17:06:10,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:06:10,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:06:10,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:06:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:10,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:06:10,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612981637] [2024-06-27 17:06:10,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612981637] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:06:10,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454903020] [2024-06-27 17:06:10,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:06:10,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:10,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:06:10,794 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:06:10,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-27 17:06:10,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 17:06:10,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:06:10,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-27 17:06:10,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:06:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:06:11,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:06:11,310 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:06:11,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2024-06-27 17:06:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 17:06:11,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454903020] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:06:11,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:06:11,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 11] total 37 [2024-06-27 17:06:11,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431740104] [2024-06-27 17:06:11,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:06:11,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-06-27 17:06:11,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:06:11,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-06-27 17:06:11,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2024-06-27 17:06:11,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-06-27 17:06:11,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 757 transitions, 14932 flow. Second operand has 38 states, 38 states have (on average 5.7631578947368425) internal successors, (219), 38 states have internal predecessors, (219), 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 17:06:11,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:06:11,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-06-27 17:06:11,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:06:14,591 INFO L124 PetriNetUnfolderBase]: 4412/8260 cut-off events. [2024-06-27 17:06:14,591 INFO L125 PetriNetUnfolderBase]: For 225742/225742 co-relation queries the response was YES. [2024-06-27 17:06:14,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65147 conditions, 8260 events. 4412/8260 cut-off events. For 225742/225742 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 58084 event pairs, 298 based on Foata normal form. 1/8261 useless extension candidates. Maximal degree in co-relation 65053. Up to 2915 conditions per place. [2024-06-27 17:06:14,674 INFO L140 encePairwiseOnDemand]: 14/29 looper letters, 402 selfloop transitions, 505 changer transitions 44/953 dead transitions. [2024-06-27 17:06:14,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 953 transitions, 18952 flow [2024-06-27 17:06:14,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-06-27 17:06:14,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-06-27 17:06:14,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 368 transitions. [2024-06-27 17:06:14,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3339382940108893 [2024-06-27 17:06:14,676 INFO L175 Difference]: Start difference. First operand has 310 places, 757 transitions, 14932 flow. Second operand 38 states and 368 transitions. [2024-06-27 17:06:14,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 953 transitions, 18952 flow [2024-06-27 17:06:15,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 953 transitions, 18854 flow, removed 33 selfloop flow, removed 11 redundant places. [2024-06-27 17:06:15,957 INFO L231 Difference]: Finished difference. Result has 341 places, 786 transitions, 16391 flow [2024-06-27 17:06:15,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=14862, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=473, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=16391, PETRI_PLACES=341, PETRI_TRANSITIONS=786} [2024-06-27 17:06:15,958 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 312 predicate places. [2024-06-27 17:06:15,958 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 786 transitions, 16391 flow [2024-06-27 17:06:15,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.7631578947368425) internal successors, (219), 38 states have internal predecessors, (219), 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 17:06:15,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:06:15,959 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 17:06:15,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-06-27 17:06:16,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-06-27 17:06:16,159 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 17:06:16,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:06:16,160 INFO L85 PathProgramCache]: Analyzing trace with hash 289980871, now seen corresponding path program 7 times [2024-06-27 17:06:16,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:06:16,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828933105] [2024-06-27 17:06:16,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:06:16,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:06:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:06:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:16,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:06:16,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828933105] [2024-06-27 17:06:16,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828933105] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:06:16,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033687433] [2024-06-27 17:06:16,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:06:16,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:16,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:06:16,727 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:06:16,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-06-27 17:06:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:06:16,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 17:06:16,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:06:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:06:17,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:06:17,167 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:06:17,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-06-27 17:06:17,232 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 17:06:17,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033687433] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:06:17,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:06:17,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 35 [2024-06-27 17:06:17,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743729666] [2024-06-27 17:06:17,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:06:17,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-27 17:06:17,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:06:17,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-27 17:06:17,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2024-06-27 17:06:17,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-06-27 17:06:17,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 786 transitions, 16391 flow. Second operand has 36 states, 36 states have (on average 5.861111111111111) internal successors, (211), 36 states have internal predecessors, (211), 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 17:06:17,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:06:17,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-06-27 17:06:17,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:06:20,290 INFO L124 PetriNetUnfolderBase]: 4536/8492 cut-off events. [2024-06-27 17:06:20,290 INFO L125 PetriNetUnfolderBase]: For 245955/245955 co-relation queries the response was YES. [2024-06-27 17:06:20,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69970 conditions, 8492 events. 4536/8492 cut-off events. For 245955/245955 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 60612 event pairs, 425 based on Foata normal form. 1/8493 useless extension candidates. Maximal degree in co-relation 69874. Up to 4677 conditions per place. [2024-06-27 17:06:20,372 INFO L140 encePairwiseOnDemand]: 14/29 looper letters, 414 selfloop transitions, 460 changer transitions 40/916 dead transitions. [2024-06-27 17:06:20,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 916 transitions, 19751 flow [2024-06-27 17:06:20,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 17:06:20,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 17:06:20,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 267 transitions. [2024-06-27 17:06:20,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3288177339901478 [2024-06-27 17:06:20,374 INFO L175 Difference]: Start difference. First operand has 341 places, 786 transitions, 16391 flow. Second operand 28 states and 267 transitions. [2024-06-27 17:06:20,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 916 transitions, 19751 flow [2024-06-27 17:06:21,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 916 transitions, 19370 flow, removed 34 selfloop flow, removed 18 redundant places. [2024-06-27 17:06:21,653 INFO L231 Difference]: Finished difference. Result has 353 places, 804 transitions, 18091 flow [2024-06-27 17:06:21,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=16034, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=18091, PETRI_PLACES=353, PETRI_TRANSITIONS=804} [2024-06-27 17:06:21,654 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 324 predicate places. [2024-06-27 17:06:21,654 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 804 transitions, 18091 flow [2024-06-27 17:06:21,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.861111111111111) internal successors, (211), 36 states have internal predecessors, (211), 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 17:06:21,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:06:21,654 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 17:06:21,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-06-27 17:06:21,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-06-27 17:06:21,873 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:06:21,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:06:21,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1640305171, now seen corresponding path program 8 times [2024-06-27 17:06:21,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:06:21,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793939661] [2024-06-27 17:06:21,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:06:21,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:06:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:06:22,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:22,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:06:22,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793939661] [2024-06-27 17:06:22,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793939661] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:06:22,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773978277] [2024-06-27 17:06:22,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:06:22,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:22,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:06:22,478 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:06:22,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-06-27 17:06:22,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:06:22,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:06:22,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 17:06:22,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:06:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:06:22,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:06:22,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:06:22,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-06-27 17:06:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 17:06:23,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773978277] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:06:23,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:06:23,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 35 [2024-06-27 17:06:23,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870674474] [2024-06-27 17:06:23,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:06:23,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-27 17:06:23,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:06:23,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-27 17:06:23,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2024-06-27 17:06:23,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-06-27 17:06:23,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 804 transitions, 18091 flow. Second operand has 36 states, 36 states have (on average 5.861111111111111) internal successors, (211), 36 states have internal predecessors, (211), 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 17:06:23,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:06:23,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-06-27 17:06:23,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:06:26,290 INFO L124 PetriNetUnfolderBase]: 4786/8958 cut-off events. [2024-06-27 17:06:26,291 INFO L125 PetriNetUnfolderBase]: For 313503/313503 co-relation queries the response was YES. [2024-06-27 17:06:26,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78775 conditions, 8958 events. 4786/8958 cut-off events. For 313503/313503 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 64670 event pairs, 419 based on Foata normal form. 1/8959 useless extension candidates. Maximal degree in co-relation 78671. Up to 3967 conditions per place. [2024-06-27 17:06:26,390 INFO L140 encePairwiseOnDemand]: 14/29 looper letters, 434 selfloop transitions, 573 changer transitions 33/1042 dead transitions. [2024-06-27 17:06:26,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 1042 transitions, 24351 flow [2024-06-27 17:06:26,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-06-27 17:06:26,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-06-27 17:06:26,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 310 transitions. [2024-06-27 17:06:26,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3144016227180527 [2024-06-27 17:06:26,392 INFO L175 Difference]: Start difference. First operand has 353 places, 804 transitions, 18091 flow. Second operand 34 states and 310 transitions. [2024-06-27 17:06:26,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 1042 transitions, 24351 flow [2024-06-27 17:06:28,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1042 transitions, 24243 flow, removed 23 selfloop flow, removed 20 redundant places. [2024-06-27 17:06:28,154 INFO L231 Difference]: Finished difference. Result has 368 places, 901 transitions, 22207 flow [2024-06-27 17:06:28,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=17999, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=483, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=22207, PETRI_PLACES=368, PETRI_TRANSITIONS=901} [2024-06-27 17:06:28,155 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 339 predicate places. [2024-06-27 17:06:28,155 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 901 transitions, 22207 flow [2024-06-27 17:06:28,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.861111111111111) internal successors, (211), 36 states have internal predecessors, (211), 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 17:06:28,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:06:28,156 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:06:28,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-06-27 17:06:28,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-06-27 17:06:28,364 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:06:28,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:06:28,364 INFO L85 PathProgramCache]: Analyzing trace with hash -860762721, now seen corresponding path program 9 times [2024-06-27 17:06:28,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:06:28,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9792543] [2024-06-27 17:06:28,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:06:28,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:06:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:06:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:06:28,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:06:28,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9792543] [2024-06-27 17:06:28,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9792543] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:06:28,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184576068] [2024-06-27 17:06:28,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:06:28,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:28,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:06:28,474 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:06:28,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-06-27 17:06:28,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-27 17:06:28,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:06:28,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-27 17:06:28,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:06:28,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:06:28,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:06:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:06:28,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184576068] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:06:28,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:06:28,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2024-06-27 17:06:28,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645731917] [2024-06-27 17:06:28,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:06:28,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 17:06:28,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:06:28,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 17:06:28,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2024-06-27 17:06:28,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-06-27 17:06:28,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 901 transitions, 22207 flow. Second operand has 22 states, 22 states have (on average 10.590909090909092) internal successors, (233), 22 states have internal predecessors, (233), 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 17:06:28,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:06:28,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-06-27 17:06:28,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:06:29,916 INFO L124 PetriNetUnfolderBase]: 1512/3335 cut-off events. [2024-06-27 17:06:29,916 INFO L125 PetriNetUnfolderBase]: For 137658/137740 co-relation queries the response was YES. [2024-06-27 17:06:29,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32743 conditions, 3335 events. 1512/3335 cut-off events. For 137658/137740 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 24269 event pairs, 110 based on Foata normal form. 138/3444 useless extension candidates. Maximal degree in co-relation 32635. Up to 1698 conditions per place. [2024-06-27 17:06:30,037 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 239 selfloop transitions, 13 changer transitions 115/478 dead transitions. [2024-06-27 17:06:30,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 478 transitions, 11660 flow [2024-06-27 17:06:30,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:06:30,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:06:30,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 161 transitions. [2024-06-27 17:06:30,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047021943573667 [2024-06-27 17:06:30,038 INFO L175 Difference]: Start difference. First operand has 368 places, 901 transitions, 22207 flow. Second operand 11 states and 161 transitions. [2024-06-27 17:06:30,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 478 transitions, 11660 flow [2024-06-27 17:06:30,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 478 transitions, 10235 flow, removed 154 selfloop flow, removed 64 redundant places. [2024-06-27 17:06:30,493 INFO L231 Difference]: Finished difference. Result has 269 places, 335 transitions, 7151 flow [2024-06-27 17:06:30,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9299, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7151, PETRI_PLACES=269, PETRI_TRANSITIONS=335} [2024-06-27 17:06:30,494 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 240 predicate places. [2024-06-27 17:06:30,494 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 335 transitions, 7151 flow [2024-06-27 17:06:30,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.590909090909092) internal successors, (233), 22 states have internal predecessors, (233), 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 17:06:30,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:06:30,494 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:06:30,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-06-27 17:06:30,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:30,695 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:06:30,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:06:30,695 INFO L85 PathProgramCache]: Analyzing trace with hash -484397437, now seen corresponding path program 10 times [2024-06-27 17:06:30,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:06:30,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239524963] [2024-06-27 17:06:30,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:06:30,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:06:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:06:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:31,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:06:31,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239524963] [2024-06-27 17:06:31,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239524963] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:06:31,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519081059] [2024-06-27 17:06:31,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:06:31,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:31,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:06:31,037 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:06:31,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-06-27 17:06:31,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:06:31,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:06:31,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjunts are in the unsatisfiable core [2024-06-27 17:06:31,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:06:31,430 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:06:31,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-06-27 17:06:31,446 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:31,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:06:31,531 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-06-27 17:06:31,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2024-06-27 17:06:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:31,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519081059] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:06:31,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:06:31,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-06-27 17:06:31,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827915699] [2024-06-27 17:06:31,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:06:31,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 17:06:31,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:06:31,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 17:06:31,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2024-06-27 17:06:31,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 17:06:31,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 335 transitions, 7151 flow. Second operand has 31 states, 31 states have (on average 8.290322580645162) internal successors, (257), 31 states have internal predecessors, (257), 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 17:06:31,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:06:31,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 17:06:31,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:06:35,728 INFO L124 PetriNetUnfolderBase]: 4786/9123 cut-off events. [2024-06-27 17:06:35,729 INFO L125 PetriNetUnfolderBase]: For 302860/303259 co-relation queries the response was YES. [2024-06-27 17:06:35,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80457 conditions, 9123 events. 4786/9123 cut-off events. For 302860/303259 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 62938 event pairs, 455 based on Foata normal form. 391/9498 useless extension candidates. Maximal degree in co-relation 80386. Up to 2255 conditions per place. [2024-06-27 17:06:35,812 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 868 selfloop transitions, 481 changer transitions 0/1421 dead transitions. [2024-06-27 17:06:35,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 1421 transitions, 31978 flow [2024-06-27 17:06:35,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-06-27 17:06:35,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-06-27 17:06:35,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 728 transitions. [2024-06-27 17:06:35,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229885057471264 [2024-06-27 17:06:35,815 INFO L175 Difference]: Start difference. First operand has 269 places, 335 transitions, 7151 flow. Second operand 48 states and 728 transitions. [2024-06-27 17:06:35,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 1421 transitions, 31978 flow [2024-06-27 17:06:36,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 1421 transitions, 29742 flow, removed 615 selfloop flow, removed 31 redundant places. [2024-06-27 17:06:36,642 INFO L231 Difference]: Finished difference. Result has 291 places, 757 transitions, 19049 flow [2024-06-27 17:06:36,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6760, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=19049, PETRI_PLACES=291, PETRI_TRANSITIONS=757} [2024-06-27 17:06:36,643 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 262 predicate places. [2024-06-27 17:06:36,643 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 757 transitions, 19049 flow [2024-06-27 17:06:36,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 8.290322580645162) internal successors, (257), 31 states have internal predecessors, (257), 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 17:06:36,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:06:36,643 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:06:36,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-06-27 17:06:36,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:36,844 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:06:36,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:06:36,844 INFO L85 PathProgramCache]: Analyzing trace with hash -2096187447, now seen corresponding path program 11 times [2024-06-27 17:06:36,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:06:36,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985745446] [2024-06-27 17:06:36,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:06:36,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:06:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:06:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:37,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:06:37,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985745446] [2024-06-27 17:06:37,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985745446] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:06:37,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042230313] [2024-06-27 17:06:37,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:06:37,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:37,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:06:37,314 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:06:37,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-06-27 17:06:37,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 17:06:37,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:06:37,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjunts are in the unsatisfiable core [2024-06-27 17:06:37,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:06:37,658 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:06:37,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-06-27 17:06:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:37,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:06:37,786 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-06-27 17:06:37,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2024-06-27 17:06:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:38,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042230313] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:06:38,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:06:38,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-06-27 17:06:38,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966878206] [2024-06-27 17:06:38,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:06:38,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 17:06:38,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:06:38,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 17:06:38,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2024-06-27 17:06:38,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 17:06:38,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 757 transitions, 19049 flow. Second operand has 31 states, 31 states have (on average 8.290322580645162) internal successors, (257), 31 states have internal predecessors, (257), 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 17:06:38,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:06:38,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 17:06:38,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:06:45,615 INFO L124 PetriNetUnfolderBase]: 9786/18333 cut-off events. [2024-06-27 17:06:45,616 INFO L125 PetriNetUnfolderBase]: For 1272513/1273822 co-relation queries the response was YES. [2024-06-27 17:06:45,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195699 conditions, 18333 events. 9786/18333 cut-off events. For 1272513/1273822 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 136476 event pairs, 788 based on Foata normal form. 757/19071 useless extension candidates. Maximal degree in co-relation 195601. Up to 4822 conditions per place. [2024-06-27 17:06:45,831 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 1202 selfloop transitions, 982 changer transitions 0/2256 dead transitions. [2024-06-27 17:06:45,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 2256 transitions, 61390 flow [2024-06-27 17:06:45,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-06-27 17:06:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2024-06-27 17:06:45,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 825 transitions. [2024-06-27 17:06:45,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49909255898366606 [2024-06-27 17:06:45,833 INFO L175 Difference]: Start difference. First operand has 291 places, 757 transitions, 19049 flow. Second operand 57 states and 825 transitions. [2024-06-27 17:06:45,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 2256 transitions, 61390 flow [2024-06-27 17:06:50,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 2256 transitions, 58732 flow, removed 1311 selfloop flow, removed 7 redundant places. [2024-06-27 17:06:50,814 INFO L231 Difference]: Finished difference. Result has 378 places, 1438 transitions, 42960 flow [2024-06-27 17:06:50,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=17690, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=42960, PETRI_PLACES=378, PETRI_TRANSITIONS=1438} [2024-06-27 17:06:50,815 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 349 predicate places. [2024-06-27 17:06:50,815 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 1438 transitions, 42960 flow [2024-06-27 17:06:50,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 8.290322580645162) internal successors, (257), 31 states have internal predecessors, (257), 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 17:06:50,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:06:50,816 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:06:50,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-06-27 17:06:51,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:51,027 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:06:51,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:06:51,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1379569761, now seen corresponding path program 12 times [2024-06-27 17:06:51,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:06:51,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995991206] [2024-06-27 17:06:51,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:06:51,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:06:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:06:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:51,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:06:51,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995991206] [2024-06-27 17:06:51,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995991206] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:06:51,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325765148] [2024-06-27 17:06:51,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:06:51,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:51,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:06:51,375 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:06:51,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-06-27 17:06:51,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 17:06:51,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:06:51,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjunts are in the unsatisfiable core [2024-06-27 17:06:51,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:06:51,657 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:06:51,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2024-06-27 17:06:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:51,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:06:51,889 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:06:51,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-06-27 17:06:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:52,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325765148] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:06:52,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:06:52,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-06-27 17:06:52,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745058227] [2024-06-27 17:06:52,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:06:52,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 17:06:52,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:06:52,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 17:06:52,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2024-06-27 17:06:52,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 17:06:52,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 1438 transitions, 42960 flow. Second operand has 32 states, 32 states have (on average 8.1875) internal successors, (262), 32 states have internal predecessors, (262), 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 17:06:52,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:06:52,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 17:06:52,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:06:58,022 INFO L124 PetriNetUnfolderBase]: 4393/9048 cut-off events. [2024-06-27 17:06:58,022 INFO L125 PetriNetUnfolderBase]: For 743278/743468 co-relation queries the response was YES. [2024-06-27 17:06:58,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95546 conditions, 9048 events. 4393/9048 cut-off events. For 743278/743468 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 69919 event pairs, 499 based on Foata normal form. 600/9618 useless extension candidates. Maximal degree in co-relation 95409. Up to 2392 conditions per place. [2024-06-27 17:06:58,124 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 460 selfloop transitions, 221 changer transitions 372/1125 dead transitions. [2024-06-27 17:06:58,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1125 transitions, 31070 flow [2024-06-27 17:06:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-06-27 17:06:58,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-06-27 17:06:58,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 516 transitions. [2024-06-27 17:06:58,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46823956442831216 [2024-06-27 17:06:58,125 INFO L175 Difference]: Start difference. First operand has 378 places, 1438 transitions, 42960 flow. Second operand 38 states and 516 transitions. [2024-06-27 17:06:58,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1125 transitions, 31070 flow [2024-06-27 17:07:02,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 1125 transitions, 28290 flow, removed 1141 selfloop flow, removed 43 redundant places. [2024-06-27 17:07:02,039 INFO L231 Difference]: Finished difference. Result has 369 places, 530 transitions, 13715 flow [2024-06-27 17:07:02,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=19960, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=13715, PETRI_PLACES=369, PETRI_TRANSITIONS=530} [2024-06-27 17:07:02,040 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 340 predicate places. [2024-06-27 17:07:02,040 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 530 transitions, 13715 flow [2024-06-27 17:07:02,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 8.1875) internal successors, (262), 32 states have internal predecessors, (262), 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 17:07:02,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:02,040 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:02,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-06-27 17:07:02,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:02,241 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:07:02,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:02,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1788862515, now seen corresponding path program 13 times [2024-06-27 17:07:02,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:02,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137699699] [2024-06-27 17:07:02,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:02,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:02,656 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:02,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:02,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137699699] [2024-06-27 17:07:02,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137699699] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:02,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526284053] [2024-06-27 17:07:02,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:07:02,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:02,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:02,658 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:07:02,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-06-27 17:07:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:02,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 17:07:02,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:02,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-06-27 17:07:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:03,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:03,123 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-06-27 17:07:03,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2024-06-27 17:07:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:03,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526284053] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:03,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:03,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-06-27 17:07:03,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849533544] [2024-06-27 17:07:03,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:03,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 17:07:03,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:03,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 17:07:03,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2024-06-27 17:07:03,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 17:07:03,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 530 transitions, 13715 flow. Second operand has 31 states, 31 states have (on average 8.193548387096774) internal successors, (254), 31 states have internal predecessors, (254), 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 17:07:03,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:03,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 17:07:03,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:06,888 INFO L124 PetriNetUnfolderBase]: 3472/7234 cut-off events. [2024-06-27 17:07:06,889 INFO L125 PetriNetUnfolderBase]: For 385596/385858 co-relation queries the response was YES. [2024-06-27 17:07:06,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67984 conditions, 7234 events. 3472/7234 cut-off events. For 385596/385858 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 55317 event pairs, 175 based on Foata normal form. 151/7320 useless extension candidates. Maximal degree in co-relation 67863. Up to 1686 conditions per place. [2024-06-27 17:07:06,978 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 572 selfloop transitions, 436 changer transitions 17/1097 dead transitions. [2024-06-27 17:07:06,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 1097 transitions, 26541 flow [2024-06-27 17:07:06,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-06-27 17:07:06,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-06-27 17:07:06,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 665 transitions. [2024-06-27 17:07:06,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46798029556650245 [2024-06-27 17:07:06,979 INFO L175 Difference]: Start difference. First operand has 369 places, 530 transitions, 13715 flow. Second operand 49 states and 665 transitions. [2024-06-27 17:07:06,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 1097 transitions, 26541 flow [2024-06-27 17:07:08,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 1097 transitions, 25623 flow, removed 413 selfloop flow, removed 27 redundant places. [2024-06-27 17:07:08,453 INFO L231 Difference]: Finished difference. Result has 386 places, 685 transitions, 19525 flow [2024-06-27 17:07:08,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=13048, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=19525, PETRI_PLACES=386, PETRI_TRANSITIONS=685} [2024-06-27 17:07:08,454 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 357 predicate places. [2024-06-27 17:07:08,454 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 685 transitions, 19525 flow [2024-06-27 17:07:08,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 8.193548387096774) internal successors, (254), 31 states have internal predecessors, (254), 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 17:07:08,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:08,454 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:08,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-06-27 17:07:08,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:08,666 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:07:08,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:08,667 INFO L85 PathProgramCache]: Analyzing trace with hash -751078223, now seen corresponding path program 14 times [2024-06-27 17:07:08,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:08,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698858575] [2024-06-27 17:07:08,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:08,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:07:08,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:08,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698858575] [2024-06-27 17:07:08,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698858575] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:08,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354027765] [2024-06-27 17:07:08,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:07:08,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:08,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:08,739 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:07:08,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-06-27 17:07:08,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:07:08,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:07:08,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 17:07:08,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:07:08,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:08,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:07:08,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354027765] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:08,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:08,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 6] total 15 [2024-06-27 17:07:08,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633286074] [2024-06-27 17:07:08,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:08,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 17:07:08,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:08,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 17:07:08,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-06-27 17:07:08,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-06-27 17:07:08,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 685 transitions, 19525 flow. Second operand has 16 states, 16 states have (on average 11.625) internal successors, (186), 16 states have internal predecessors, (186), 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 17:07:08,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:08,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-06-27 17:07:08,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:11,286 INFO L124 PetriNetUnfolderBase]: 3656/8212 cut-off events. [2024-06-27 17:07:11,286 INFO L125 PetriNetUnfolderBase]: For 437433/437757 co-relation queries the response was YES. [2024-06-27 17:07:11,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81251 conditions, 8212 events. 3656/8212 cut-off events. For 437433/437757 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 69178 event pairs, 367 based on Foata normal form. 106/8150 useless extension candidates. Maximal degree in co-relation 81131. Up to 2129 conditions per place. [2024-06-27 17:07:11,389 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 298 selfloop transitions, 276 changer transitions 51/871 dead transitions. [2024-06-27 17:07:11,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 871 transitions, 24958 flow [2024-06-27 17:07:11,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 17:07:11,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 17:07:11,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 198 transitions. [2024-06-27 17:07:11,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5251989389920424 [2024-06-27 17:07:11,391 INFO L175 Difference]: Start difference. First operand has 386 places, 685 transitions, 19525 flow. Second operand 13 states and 198 transitions. [2024-06-27 17:07:11,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 871 transitions, 24958 flow [2024-06-27 17:07:13,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 871 transitions, 22784 flow, removed 644 selfloop flow, removed 30 redundant places. [2024-06-27 17:07:13,213 INFO L231 Difference]: Finished difference. Result has 368 places, 744 transitions, 21223 flow [2024-06-27 17:07:13,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=17718, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=21223, PETRI_PLACES=368, PETRI_TRANSITIONS=744} [2024-06-27 17:07:13,214 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 339 predicate places. [2024-06-27 17:07:13,214 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 744 transitions, 21223 flow [2024-06-27 17:07:13,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.625) internal successors, (186), 16 states have internal predecessors, (186), 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 17:07:13,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:13,215 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:13,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-06-27 17:07:13,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:13,426 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:07:13,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:13,427 INFO L85 PathProgramCache]: Analyzing trace with hash 481950751, now seen corresponding path program 15 times [2024-06-27 17:07:13,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:13,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143437938] [2024-06-27 17:07:13,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:13,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:13,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:13,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143437938] [2024-06-27 17:07:13,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143437938] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:13,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003853823] [2024-06-27 17:07:13,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:07:13,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:13,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:13,749 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:07:13,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-06-27 17:07:13,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 17:07:13,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:07:13,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 17:07:13,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:14,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:14,095 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:07:14,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-06-27 17:07:14,336 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:14,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003853823] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:14,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:14,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-06-27 17:07:14,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919822125] [2024-06-27 17:07:14,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:14,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 17:07:14,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:14,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 17:07:14,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2024-06-27 17:07:14,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 17:07:14,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 744 transitions, 21223 flow. Second operand has 31 states, 31 states have (on average 8.290322580645162) internal successors, (257), 31 states have internal predecessors, (257), 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 17:07:14,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:14,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 17:07:14,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:17,801 INFO L124 PetriNetUnfolderBase]: 4412/8963 cut-off events. [2024-06-27 17:07:17,802 INFO L125 PetriNetUnfolderBase]: For 429636/429969 co-relation queries the response was YES. [2024-06-27 17:07:17,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86429 conditions, 8963 events. 4412/8963 cut-off events. For 429636/429969 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 70708 event pairs, 327 based on Foata normal form. 139/9083 useless extension candidates. Maximal degree in co-relation 86318. Up to 2289 conditions per place. [2024-06-27 17:07:17,903 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 539 selfloop transitions, 423 changer transitions 2/1028 dead transitions. [2024-06-27 17:07:17,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1028 transitions, 27778 flow [2024-06-27 17:07:17,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-06-27 17:07:17,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-06-27 17:07:17,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 402 transitions. [2024-06-27 17:07:17,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46206896551724136 [2024-06-27 17:07:17,904 INFO L175 Difference]: Start difference. First operand has 368 places, 744 transitions, 21223 flow. Second operand 30 states and 402 transitions. [2024-06-27 17:07:17,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1028 transitions, 27778 flow [2024-06-27 17:07:19,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 1028 transitions, 25157 flow, removed 291 selfloop flow, removed 19 redundant places. [2024-06-27 17:07:19,521 INFO L231 Difference]: Finished difference. Result has 345 places, 771 transitions, 21189 flow [2024-06-27 17:07:19,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=19030, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=21189, PETRI_PLACES=345, PETRI_TRANSITIONS=771} [2024-06-27 17:07:19,522 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 316 predicate places. [2024-06-27 17:07:19,522 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 771 transitions, 21189 flow [2024-06-27 17:07:19,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 8.290322580645162) internal successors, (257), 31 states have internal predecessors, (257), 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 17:07:19,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:19,523 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:19,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-06-27 17:07:19,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-06-27 17:07:19,734 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:07:19,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:19,735 INFO L85 PathProgramCache]: Analyzing trace with hash -632529175, now seen corresponding path program 16 times [2024-06-27 17:07:19,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:19,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764303248] [2024-06-27 17:07:19,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:19,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:20,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:20,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764303248] [2024-06-27 17:07:20,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764303248] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:20,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725441396] [2024-06-27 17:07:20,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:07:20,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:20,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:20,221 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:07:20,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-06-27 17:07:20,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:07:20,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:07:20,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 17:07:20,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 17:07:20,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:20,424 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-06-27 17:07:20,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2024-06-27 17:07:20,437 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 17:07:20,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725441396] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:20,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:20,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 6] total 20 [2024-06-27 17:07:20,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005292746] [2024-06-27 17:07:20,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:20,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 17:07:20,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:20,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 17:07:20,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2024-06-27 17:07:20,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 17:07:20,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 771 transitions, 21189 flow. Second operand has 21 states, 21 states have (on average 8.80952380952381) internal successors, (185), 21 states have internal predecessors, (185), 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 17:07:20,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:20,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 17:07:20,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:23,400 INFO L124 PetriNetUnfolderBase]: 4652/9480 cut-off events. [2024-06-27 17:07:23,400 INFO L125 PetriNetUnfolderBase]: For 399007/399268 co-relation queries the response was YES. [2024-06-27 17:07:23,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88337 conditions, 9480 events. 4652/9480 cut-off events. For 399007/399268 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 74965 event pairs, 230 based on Foata normal form. 190/9655 useless extension candidates. Maximal degree in co-relation 88230. Up to 2348 conditions per place. [2024-06-27 17:07:23,497 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 639 selfloop transitions, 381 changer transitions 4/1088 dead transitions. [2024-06-27 17:07:23,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 1088 transitions, 29827 flow [2024-06-27 17:07:23,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 17:07:23,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 17:07:23,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 282 transitions. [2024-06-27 17:07:23,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44200626959247646 [2024-06-27 17:07:23,498 INFO L175 Difference]: Start difference. First operand has 345 places, 771 transitions, 21189 flow. Second operand 22 states and 282 transitions. [2024-06-27 17:07:23,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 1088 transitions, 29827 flow [2024-06-27 17:07:24,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1088 transitions, 29493 flow, removed 77 selfloop flow, removed 16 redundant places. [2024-06-27 17:07:24,922 INFO L231 Difference]: Finished difference. Result has 355 places, 824 transitions, 24628 flow [2024-06-27 17:07:24,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=20705, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=24628, PETRI_PLACES=355, PETRI_TRANSITIONS=824} [2024-06-27 17:07:24,923 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 326 predicate places. [2024-06-27 17:07:24,923 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 824 transitions, 24628 flow [2024-06-27 17:07:24,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.80952380952381) internal successors, (185), 21 states have internal predecessors, (185), 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 17:07:24,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:24,924 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:24,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-06-27 17:07:25,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-06-27 17:07:25,124 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:07:25,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:25,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1448234905, now seen corresponding path program 17 times [2024-06-27 17:07:25,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:25,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475760176] [2024-06-27 17:07:25,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:25,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:26,051 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:26,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:26,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475760176] [2024-06-27 17:07:26,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475760176] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:26,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427038213] [2024-06-27 17:07:26,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:07:26,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:26,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:26,052 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:07:26,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-06-27 17:07:26,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 17:07:26,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:07:26,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 34 conjunts are in the unsatisfiable core [2024-06-27 17:07:26,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 17:07:26,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:26,893 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:07:26,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2024-06-27 17:07:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 17:07:26,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427038213] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:26,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:26,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 14] total 46 [2024-06-27 17:07:26,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722687015] [2024-06-27 17:07:26,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:26,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-06-27 17:07:26,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:26,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-06-27 17:07:26,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2001, Unknown=0, NotChecked=0, Total=2162 [2024-06-27 17:07:26,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-06-27 17:07:26,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 824 transitions, 24628 flow. Second operand has 47 states, 47 states have (on average 5.872340425531915) internal successors, (276), 47 states have internal predecessors, (276), 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 17:07:26,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:26,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-06-27 17:07:26,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:34,414 INFO L124 PetriNetUnfolderBase]: 6413/12385 cut-off events. [2024-06-27 17:07:34,414 INFO L125 PetriNetUnfolderBase]: For 503890/503890 co-relation queries the response was YES. [2024-06-27 17:07:34,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110885 conditions, 12385 events. 6413/12385 cut-off events. For 503890/503890 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 96840 event pairs, 538 based on Foata normal form. 8/12393 useless extension candidates. Maximal degree in co-relation 110773. Up to 4313 conditions per place. [2024-06-27 17:07:34,571 INFO L140 encePairwiseOnDemand]: 15/29 looper letters, 577 selfloop transitions, 621 changer transitions 75/1275 dead transitions. [2024-06-27 17:07:34,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 1275 transitions, 34086 flow [2024-06-27 17:07:34,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-06-27 17:07:34,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2024-06-27 17:07:34,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 699 transitions. [2024-06-27 17:07:34,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3257222739981361 [2024-06-27 17:07:34,573 INFO L175 Difference]: Start difference. First operand has 355 places, 824 transitions, 24628 flow. Second operand 74 states and 699 transitions. [2024-06-27 17:07:34,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 1275 transitions, 34086 flow [2024-06-27 17:07:36,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 1275 transitions, 33445 flow, removed 21 selfloop flow, removed 15 redundant places. [2024-06-27 17:07:36,989 INFO L231 Difference]: Finished difference. Result has 430 places, 937 transitions, 29119 flow [2024-06-27 17:07:36,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=24083, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=824, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=517, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=29119, PETRI_PLACES=430, PETRI_TRANSITIONS=937} [2024-06-27 17:07:36,990 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 401 predicate places. [2024-06-27 17:07:36,990 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 937 transitions, 29119 flow [2024-06-27 17:07:36,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 5.872340425531915) internal successors, (276), 47 states have internal predecessors, (276), 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 17:07:36,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:36,990 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:37,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-06-27 17:07:37,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-06-27 17:07:37,191 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:07:37,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:37,191 INFO L85 PathProgramCache]: Analyzing trace with hash -829657523, now seen corresponding path program 18 times [2024-06-27 17:07:37,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:37,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682334350] [2024-06-27 17:07:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:37,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:37,983 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:37,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:37,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682334350] [2024-06-27 17:07:37,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682334350] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:37,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183621379] [2024-06-27 17:07:37,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:07:37,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:37,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:37,985 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:07:37,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-06-27 17:07:38,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 17:07:38,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:07:38,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 47 conjunts are in the unsatisfiable core [2024-06-27 17:07:38,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:38,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 17:07:38,690 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:07:38,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 18 [2024-06-27 17:07:38,940 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:38,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:39,549 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-06-27 17:07:39,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 53 [2024-06-27 17:07:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:40,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183621379] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:40,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:40,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 56 [2024-06-27 17:07:40,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162234581] [2024-06-27 17:07:40,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:40,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-06-27 17:07:40,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:40,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-06-27 17:07:40,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=2882, Unknown=0, NotChecked=0, Total=3192 [2024-06-27 17:07:40,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-06-27 17:07:40,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 937 transitions, 29119 flow. Second operand has 57 states, 57 states have (on average 5.666666666666667) internal successors, (323), 57 states have internal predecessors, (323), 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 17:07:40,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:40,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-06-27 17:07:40,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:57,149 INFO L124 PetriNetUnfolderBase]: 8909/17132 cut-off events. [2024-06-27 17:07:57,149 INFO L125 PetriNetUnfolderBase]: For 786086/786086 co-relation queries the response was YES. [2024-06-27 17:07:57,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161823 conditions, 17132 events. 8909/17132 cut-off events. For 786086/786086 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 140633 event pairs, 981 based on Foata normal form. 4/17136 useless extension candidates. Maximal degree in co-relation 161699. Up to 4497 conditions per place. [2024-06-27 17:07:57,348 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 576 selfloop transitions, 1470 changer transitions 67/2115 dead transitions. [2024-06-27 17:07:57,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 2115 transitions, 58770 flow [2024-06-27 17:07:57,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2024-06-27 17:07:57,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2024-06-27 17:07:57,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 1203 transitions. [2024-06-27 17:07:57,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30957282552753473 [2024-06-27 17:07:57,350 INFO L175 Difference]: Start difference. First operand has 430 places, 937 transitions, 29119 flow. Second operand 134 states and 1203 transitions. [2024-06-27 17:07:57,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 2115 transitions, 58770 flow