./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.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/chl-name-comparator-symm.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 e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:34:56,488 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:34:56,550 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:34:56,554 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:34:56,554 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:34:56,576 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:34:56,577 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:34:56,578 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:34:56,578 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:34:56,582 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:34:56,582 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:34:56,582 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:34:56,583 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:34:56,583 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:34:56,583 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:34:56,583 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:34:56,583 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:34:56,584 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:34:56,584 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:34:56,584 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:34:56,584 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:34:56,584 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:34:56,584 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:34:56,585 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:34:56,585 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:34:56,585 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:34:56,585 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:34:56,585 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:34:56,585 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:34:56,586 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:34:56,586 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:34:56,586 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:34:56,586 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:34:56,586 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:34:56,586 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:34:56,586 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:34:56,587 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:34:56,587 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:34:56,587 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:34:56,587 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:34:56,587 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:34:56,587 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:34:56,587 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:34:56,587 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc [2024-06-27 16:34:56,759 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:34:56,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:34:56,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:34:56,779 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:34:56,779 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:34:56,780 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2024-06-27 16:34:57,807 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:34:58,004 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:34:58,005 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2024-06-27 16:34:58,011 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61c6381c5/cfed3d89342a450ca2356f3392a3b39e/FLAG50e47ccd2 [2024-06-27 16:34:58,020 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61c6381c5/cfed3d89342a450ca2356f3392a3b39e [2024-06-27 16:34:58,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:34:58,023 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:34:58,023 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:34:58,024 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:34:58,032 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:34:58,033 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:34:58" (1/1) ... [2024-06-27 16:34:58,034 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a7cb029 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:34:58, skipping insertion in model container [2024-06-27 16:34:58,034 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:34:58" (1/1) ... [2024-06-27 16:34:58,058 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:34:58,180 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/chl-name-comparator-symm.wvr.c[3882,3895] [2024-06-27 16:34:58,191 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:34:58,197 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:34:58,213 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/chl-name-comparator-symm.wvr.c[3882,3895] [2024-06-27 16:34:58,216 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:34:58,228 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:34:58,229 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:34:58 WrapperNode [2024-06-27 16:34:58,229 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:34:58,230 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:34:58,230 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:34:58,230 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:34:58,234 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:34:58" (1/1) ... [2024-06-27 16:34:58,240 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:34:58" (1/1) ... [2024-06-27 16:34:58,260 INFO L138 Inliner]: procedures = 24, calls = 24, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 219 [2024-06-27 16:34:58,268 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:34:58,268 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:34:58,269 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:34:58,269 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:34:58,280 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:34:58" (1/1) ... [2024-06-27 16:34:58,280 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:34:58" (1/1) ... [2024-06-27 16:34:58,283 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:34:58" (1/1) ... [2024-06-27 16:34:58,298 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 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 16:34:58,299 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:34:58" (1/1) ... [2024-06-27 16:34:58,299 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:34:58" (1/1) ... [2024-06-27 16:34:58,304 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:34:58" (1/1) ... [2024-06-27 16:34:58,319 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:34:58" (1/1) ... [2024-06-27 16:34:58,321 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:34:58" (1/1) ... [2024-06-27 16:34:58,322 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:34:58" (1/1) ... [2024-06-27 16:34:58,324 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:34:58,325 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:34:58,325 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:34:58,325 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:34:58,326 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:34:58" (1/1) ... [2024-06-27 16:34:58,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:34:58,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:34:58,363 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 16:34:58,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 16:34:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:34:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 16:34:58,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 16:34:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 16:34:58,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 16:34:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:34:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:34:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:34:58,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:34:58,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 16:34:58,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:34:58,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:34:58,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:34:58,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:34:58,406 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 16:34:58,505 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:34:58,507 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:34:58,768 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:34:58,769 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:34:59,091 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:34:59,092 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-27 16:34:59,092 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:34:59 BoogieIcfgContainer [2024-06-27 16:34:59,092 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:34:59,095 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:34:59,095 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:34:59,098 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:34:59,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:34:58" (1/3) ... [2024-06-27 16:34:59,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d4f64e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:34:59, skipping insertion in model container [2024-06-27 16:34:59,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:34:58" (2/3) ... [2024-06-27 16:34:59,100 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d4f64e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:34:59, skipping insertion in model container [2024-06-27 16:34:59,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:34:59" (3/3) ... [2024-06-27 16:34:59,101 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2024-06-27 16:34:59,109 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:34:59,116 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:34:59,116 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:34:59,116 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:34:59,172 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 16:34:59,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 26 transitions, 66 flow [2024-06-27 16:34:59,229 INFO L124 PetriNetUnfolderBase]: 5/24 cut-off events. [2024-06-27 16:34:59,229 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:34:59,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 5/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 26 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-06-27 16:34:59,232 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 26 transitions, 66 flow [2024-06-27 16:34:59,235 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 23 transitions, 58 flow [2024-06-27 16:34:59,247 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:34:59,254 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;@3e4882e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:34:59,254 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 16:34:59,265 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:34:59,265 INFO L124 PetriNetUnfolderBase]: 5/22 cut-off events. [2024-06-27 16:34:59,266 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:34:59,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:34:59,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:34:59,267 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:34:59,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:34:59,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1373352467, now seen corresponding path program 1 times [2024-06-27 16:34:59,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:34:59,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459283784] [2024-06-27 16:34:59,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:34:59,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:34:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:34:59,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:34:59,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459283784] [2024-06-27 16:34:59,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459283784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:34:59,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:34:59,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:34:59,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304973075] [2024-06-27 16:34:59,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:34:59,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-06-27 16:34:59,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:34:59,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-06-27 16:34:59,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-06-27 16:34:59,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:34:59,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:34:59,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:34:59,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:34:59,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:34:59,615 INFO L124 PetriNetUnfolderBase]: 92/162 cut-off events. [2024-06-27 16:34:59,615 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-06-27 16:34:59,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 162 events. 92/162 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 386 event pairs, 68 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 300. Up to 162 conditions per place. [2024-06-27 16:34:59,620 INFO L140 encePairwiseOnDemand]: 24/26 looper letters, 20 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2024-06-27 16:34:59,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 21 transitions, 94 flow [2024-06-27 16:34:59,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-06-27 16:34:59,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-06-27 16:34:59,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 28 transitions. [2024-06-27 16:34:59,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-27 16:34:59,631 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 58 flow. Second operand 2 states and 28 transitions. [2024-06-27 16:34:59,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 21 transitions, 94 flow [2024-06-27 16:34:59,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 16:34:59,634 INFO L231 Difference]: Finished difference. Result has 22 places, 21 transitions, 46 flow [2024-06-27 16:34:59,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=22, PETRI_TRANSITIONS=21} [2024-06-27 16:34:59,638 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -3 predicate places. [2024-06-27 16:34:59,638 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 21 transitions, 46 flow [2024-06-27 16:34:59,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:34:59,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:34:59,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:34:59,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:34:59,640 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:34:59,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:34:59,640 INFO L85 PathProgramCache]: Analyzing trace with hash 322998943, now seen corresponding path program 1 times [2024-06-27 16:34:59,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:34:59,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468589494] [2024-06-27 16:34:59,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:34:59,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:34:59,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:34:59,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:34:59,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468589494] [2024-06-27 16:34:59,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468589494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:34:59,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:34:59,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:34:59,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280011274] [2024-06-27 16:34:59,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:34:59,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:34:59,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:34:59,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:34:59,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:34:59,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:34:59,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:34:59,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:34:59,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:34:59,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:34:59,940 INFO L124 PetriNetUnfolderBase]: 92/163 cut-off events. [2024-06-27 16:34:59,940 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 16:34:59,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 163 events. 92/163 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 391 event pairs, 68 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 331. Up to 162 conditions per place. [2024-06-27 16:34:59,942 INFO L140 encePairwiseOnDemand]: 23/26 looper letters, 19 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2024-06-27 16:34:59,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 22 transitions, 90 flow [2024-06-27 16:34:59,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:34:59,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:34:59,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 31 transitions. [2024-06-27 16:34:59,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974358974358974 [2024-06-27 16:34:59,944 INFO L175 Difference]: Start difference. First operand has 22 places, 21 transitions, 46 flow. Second operand 3 states and 31 transitions. [2024-06-27 16:34:59,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 22 transitions, 90 flow [2024-06-27 16:34:59,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 22 transitions, 90 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 16:34:59,945 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 58 flow [2024-06-27 16:34:59,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2024-06-27 16:34:59,947 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 0 predicate places. [2024-06-27 16:34:59,947 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 58 flow [2024-06-27 16:34:59,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:34:59,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:34:59,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:34:59,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:34:59,948 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:34:59,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:34:59,949 INFO L85 PathProgramCache]: Analyzing trace with hash 397278911, now seen corresponding path program 1 times [2024-06-27 16:34:59,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:34:59,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943366505] [2024-06-27 16:34:59,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:34:59,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:34:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:35:00,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:00,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943366505] [2024-06-27 16:35:00,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943366505] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:00,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727986318] [2024-06-27 16:35:00,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:00,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:00,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:00,082 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:00,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 16:35:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:00,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2024-06-27 16:35:00,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:35:00,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:35:00,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727986318] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:00,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:00,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-06-27 16:35:00,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554397416] [2024-06-27 16:35:00,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:00,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:35:00,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:00,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:35:00,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:35:00,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:00,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:00,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:00,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:00,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:00,320 INFO L124 PetriNetUnfolderBase]: 92/165 cut-off events. [2024-06-27 16:35:00,320 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 16:35:00,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 165 events. 92/165 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 391 event pairs, 68 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 342. Up to 162 conditions per place. [2024-06-27 16:35:00,321 INFO L140 encePairwiseOnDemand]: 23/26 looper letters, 19 selfloop transitions, 4 changer transitions 0/24 dead transitions. [2024-06-27 16:35:00,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 112 flow [2024-06-27 16:35:00,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:35:00,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:35:00,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 40 transitions. [2024-06-27 16:35:00,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3076923076923077 [2024-06-27 16:35:00,323 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 58 flow. Second operand 5 states and 40 transitions. [2024-06-27 16:35:00,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 112 flow [2024-06-27 16:35:00,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 24 transitions, 108 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 16:35:00,324 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 80 flow [2024-06-27 16:35:00,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=80, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2024-06-27 16:35:00,324 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2024-06-27 16:35:00,325 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 80 flow [2024-06-27 16:35:00,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:00,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:00,325 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:00,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-06-27 16:35:00,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:00,537 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:00,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:00,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1068563135, now seen corresponding path program 2 times [2024-06-27 16:35:00,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:00,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685676340] [2024-06-27 16:35:00,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:00,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:00,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:00,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:00,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685676340] [2024-06-27 16:35:00,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685676340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:35:00,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:35:00,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 16:35:00,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562685709] [2024-06-27 16:35:00,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:35:00,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:35:00,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:00,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:35:00,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 16:35:00,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:00,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 80 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:00,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:00,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:00,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:01,032 INFO L124 PetriNetUnfolderBase]: 222/403 cut-off events. [2024-06-27 16:35:01,032 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-27 16:35:01,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 834 conditions, 403 events. 222/403 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1539 event pairs, 68 based on Foata normal form. 1/343 useless extension candidates. Maximal degree in co-relation 827. Up to 173 conditions per place. [2024-06-27 16:35:01,034 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 44 selfloop transitions, 4 changer transitions 8/57 dead transitions. [2024-06-27 16:35:01,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 57 transitions, 265 flow [2024-06-27 16:35:01,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:35:01,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:35:01,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2024-06-27 16:35:01,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-27 16:35:01,035 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 80 flow. Second operand 5 states and 70 transitions. [2024-06-27 16:35:01,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 57 transitions, 265 flow [2024-06-27 16:35:01,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 57 transitions, 255 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 16:35:01,037 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 99 flow [2024-06-27 16:35:01,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2024-06-27 16:35:01,037 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 11 predicate places. [2024-06-27 16:35:01,037 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 99 flow [2024-06-27 16:35:01,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:01,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:01,038 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:01,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 16:35:01,038 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:01,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:01,038 INFO L85 PathProgramCache]: Analyzing trace with hash -709564833, now seen corresponding path program 3 times [2024-06-27 16:35:01,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:01,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812390466] [2024-06-27 16:35:01,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:01,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:01,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:01,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812390466] [2024-06-27 16:35:01,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812390466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:35:01,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:35:01,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 16:35:01,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79076549] [2024-06-27 16:35:01,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:35:01,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:35:01,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:01,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:35:01,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 16:35:01,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:01,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 99 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:01,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:01,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:01,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:01,425 INFO L124 PetriNetUnfolderBase]: 371/674 cut-off events. [2024-06-27 16:35:01,425 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2024-06-27 16:35:01,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1619 conditions, 674 events. 371/674 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2858 event pairs, 177 based on Foata normal form. 3/677 useless extension candidates. Maximal degree in co-relation 1608. Up to 384 conditions per place. [2024-06-27 16:35:01,428 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 45 selfloop transitions, 4 changer transitions 7/57 dead transitions. [2024-06-27 16:35:01,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 57 transitions, 308 flow [2024-06-27 16:35:01,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:35:01,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:35:01,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-06-27 16:35:01,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4846153846153846 [2024-06-27 16:35:01,429 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 99 flow. Second operand 5 states and 63 transitions. [2024-06-27 16:35:01,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 57 transitions, 308 flow [2024-06-27 16:35:01,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 300 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 16:35:01,432 INFO L231 Difference]: Finished difference. Result has 41 places, 29 transitions, 122 flow [2024-06-27 16:35:01,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=41, PETRI_TRANSITIONS=29} [2024-06-27 16:35:01,433 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 16 predicate places. [2024-06-27 16:35:01,433 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 29 transitions, 122 flow [2024-06-27 16:35:01,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:01,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:01,433 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:01,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 16:35:01,442 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:01,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:01,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1546106423, now seen corresponding path program 4 times [2024-06-27 16:35:01,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:01,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450102704] [2024-06-27 16:35:01,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:01,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:01,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:01,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:01,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450102704] [2024-06-27 16:35:01,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450102704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:35:01,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:35:01,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 16:35:01,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314360196] [2024-06-27 16:35:01,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:35:01,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:35:01,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:01,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:35:01,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 16:35:01,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:01,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 29 transitions, 122 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:01,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:01,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:01,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:01,784 INFO L124 PetriNetUnfolderBase]: 356/632 cut-off events. [2024-06-27 16:35:01,784 INFO L125 PetriNetUnfolderBase]: For 396/396 co-relation queries the response was YES. [2024-06-27 16:35:01,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1696 conditions, 632 events. 356/632 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2667 event pairs, 158 based on Foata normal form. 4/636 useless extension candidates. Maximal degree in co-relation 1682. Up to 291 conditions per place. [2024-06-27 16:35:01,787 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 46 selfloop transitions, 4 changer transitions 9/60 dead transitions. [2024-06-27 16:35:01,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 60 transitions, 345 flow [2024-06-27 16:35:01,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:35:01,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:35:01,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-06-27 16:35:01,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5076923076923077 [2024-06-27 16:35:01,788 INFO L175 Difference]: Start difference. First operand has 41 places, 29 transitions, 122 flow. Second operand 5 states and 66 transitions. [2024-06-27 16:35:01,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 60 transitions, 345 flow [2024-06-27 16:35:01,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 60 transitions, 333 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 16:35:01,790 INFO L231 Difference]: Finished difference. Result has 45 places, 30 transitions, 140 flow [2024-06-27 16:35:01,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=45, PETRI_TRANSITIONS=30} [2024-06-27 16:35:01,790 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 20 predicate places. [2024-06-27 16:35:01,790 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 30 transitions, 140 flow [2024-06-27 16:35:01,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:01,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:01,791 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:01,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 16:35:01,791 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:01,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:01,791 INFO L85 PathProgramCache]: Analyzing trace with hash -513537359, now seen corresponding path program 5 times [2024-06-27 16:35:01,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:01,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747268157] [2024-06-27 16:35:01,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:01,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:01,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:02,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:02,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747268157] [2024-06-27 16:35:02,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747268157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:35:02,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:35:02,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 16:35:02,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709006070] [2024-06-27 16:35:02,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:35:02,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:35:02,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:02,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:35:02,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 16:35:02,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:02,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 30 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:02,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:02,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:02,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:02,256 INFO L124 PetriNetUnfolderBase]: 396/694 cut-off events. [2024-06-27 16:35:02,257 INFO L125 PetriNetUnfolderBase]: For 741/741 co-relation queries the response was YES. [2024-06-27 16:35:02,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1993 conditions, 694 events. 396/694 cut-off events. For 741/741 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2897 event pairs, 151 based on Foata normal form. 6/700 useless extension candidates. Maximal degree in co-relation 1977. Up to 368 conditions per place. [2024-06-27 16:35:02,261 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 46 selfloop transitions, 5 changer transitions 9/61 dead transitions. [2024-06-27 16:35:02,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 385 flow [2024-06-27 16:35:02,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:35:02,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:35:02,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-06-27 16:35:02,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5076923076923077 [2024-06-27 16:35:02,262 INFO L175 Difference]: Start difference. First operand has 45 places, 30 transitions, 140 flow. Second operand 5 states and 66 transitions. [2024-06-27 16:35:02,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 385 flow [2024-06-27 16:35:02,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 61 transitions, 363 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-27 16:35:02,266 INFO L231 Difference]: Finished difference. Result has 49 places, 32 transitions, 170 flow [2024-06-27 16:35:02,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=49, PETRI_TRANSITIONS=32} [2024-06-27 16:35:02,267 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 24 predicate places. [2024-06-27 16:35:02,267 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 32 transitions, 170 flow [2024-06-27 16:35:02,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:02,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:02,267 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:02,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 16:35:02,268 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:02,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:02,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1658143472, now seen corresponding path program 1 times [2024-06-27 16:35:02,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:02,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996154831] [2024-06-27 16:35:02,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:02,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:02,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:02,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996154831] [2024-06-27 16:35:02,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996154831] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:02,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567734441] [2024-06-27 16:35:02,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:02,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:02,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:02,364 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:02,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 16:35:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:02,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjunts are in the unsatisfiable core [2024-06-27 16:35:02,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:02,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:02,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:02,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567734441] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:02,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:35:02,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2024-06-27 16:35:02,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498135978] [2024-06-27 16:35:02,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:35:02,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:35:02,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:02,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:35:02,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 16:35:02,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:02,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 32 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:02,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:02,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:02,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:02,695 INFO L124 PetriNetUnfolderBase]: 413/718 cut-off events. [2024-06-27 16:35:02,696 INFO L125 PetriNetUnfolderBase]: For 915/915 co-relation queries the response was YES. [2024-06-27 16:35:02,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2119 conditions, 718 events. 413/718 cut-off events. For 915/915 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3132 event pairs, 40 based on Foata normal form. 9/727 useless extension candidates. Maximal degree in co-relation 2101. Up to 318 conditions per place. [2024-06-27 16:35:02,699 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 57 selfloop transitions, 6 changer transitions 2/66 dead transitions. [2024-06-27 16:35:02,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 66 transitions, 428 flow [2024-06-27 16:35:02,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:35:02,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:35:02,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2024-06-27 16:35:02,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2024-06-27 16:35:02,702 INFO L175 Difference]: Start difference. First operand has 49 places, 32 transitions, 170 flow. Second operand 5 states and 68 transitions. [2024-06-27 16:35:02,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 66 transitions, 428 flow [2024-06-27 16:35:02,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 66 transitions, 407 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 16:35:02,707 INFO L231 Difference]: Finished difference. Result has 52 places, 34 transitions, 196 flow [2024-06-27 16:35:02,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=52, PETRI_TRANSITIONS=34} [2024-06-27 16:35:02,709 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 27 predicate places. [2024-06-27 16:35:02,709 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 34 transitions, 196 flow [2024-06-27 16:35:02,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:02,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:02,710 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:02,731 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 16:35:02,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-06-27 16:35:02,931 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:02,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:02,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1577565820, now seen corresponding path program 1 times [2024-06-27 16:35:02,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:02,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723150395] [2024-06-27 16:35:02,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:02,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:03,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:03,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723150395] [2024-06-27 16:35:03,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723150395] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:03,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049156819] [2024-06-27 16:35:03,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:03,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:03,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:03,011 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:03,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 16:35:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:03,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjunts are in the unsatisfiable core [2024-06-27 16:35:03,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:03,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:03,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049156819] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:03,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:35:03,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2024-06-27 16:35:03,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020890381] [2024-06-27 16:35:03,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:35:03,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:35:03,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:03,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:35:03,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 16:35:03,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:03,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 34 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:03,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:03,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:03,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:03,324 INFO L124 PetriNetUnfolderBase]: 449/778 cut-off events. [2024-06-27 16:35:03,325 INFO L125 PetriNetUnfolderBase]: For 1358/1358 co-relation queries the response was YES. [2024-06-27 16:35:03,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2299 conditions, 778 events. 449/778 cut-off events. For 1358/1358 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3338 event pairs, 87 based on Foata normal form. 8/786 useless extension candidates. Maximal degree in co-relation 2280. Up to 339 conditions per place. [2024-06-27 16:35:03,328 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 53 selfloop transitions, 8 changer transitions 2/64 dead transitions. [2024-06-27 16:35:03,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 64 transitions, 450 flow [2024-06-27 16:35:03,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:35:03,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:35:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-06-27 16:35:03,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49230769230769234 [2024-06-27 16:35:03,329 INFO L175 Difference]: Start difference. First operand has 52 places, 34 transitions, 196 flow. Second operand 5 states and 64 transitions. [2024-06-27 16:35:03,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 64 transitions, 450 flow [2024-06-27 16:35:03,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 64 transitions, 436 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 16:35:03,332 INFO L231 Difference]: Finished difference. Result has 56 places, 36 transitions, 235 flow [2024-06-27 16:35:03,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=56, PETRI_TRANSITIONS=36} [2024-06-27 16:35:03,334 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 31 predicate places. [2024-06-27 16:35:03,334 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 36 transitions, 235 flow [2024-06-27 16:35:03,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:03,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:03,334 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:03,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 16:35:03,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:03,547 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:03,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:03,547 INFO L85 PathProgramCache]: Analyzing trace with hash -307064914, now seen corresponding path program 2 times [2024-06-27 16:35:03,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:03,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084761395] [2024-06-27 16:35:03,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:03,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:03,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:03,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084761395] [2024-06-27 16:35:03,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084761395] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:03,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621324600] [2024-06-27 16:35:03,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:35:03,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:03,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:03,642 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:03,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 16:35:03,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:35:03,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:03,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:35:03,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:03,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:03,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621324600] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:03,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:03,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-06-27 16:35:03,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690065399] [2024-06-27 16:35:03,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:03,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 16:35:03,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:03,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 16:35:03,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 16:35:03,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:03,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 36 transitions, 235 flow. Second operand has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:03,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:03,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:03,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:04,145 INFO L124 PetriNetUnfolderBase]: 479/835 cut-off events. [2024-06-27 16:35:04,146 INFO L125 PetriNetUnfolderBase]: For 1916/1916 co-relation queries the response was YES. [2024-06-27 16:35:04,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2542 conditions, 835 events. 479/835 cut-off events. For 1916/1916 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3741 event pairs, 80 based on Foata normal form. 9/844 useless extension candidates. Maximal degree in co-relation 2521. Up to 295 conditions per place. [2024-06-27 16:35:04,149 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 72 selfloop transitions, 14 changer transitions 5/92 dead transitions. [2024-06-27 16:35:04,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 92 transitions, 608 flow [2024-06-27 16:35:04,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:35:04,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:35:04,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2024-06-27 16:35:04,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048076923076923 [2024-06-27 16:35:04,150 INFO L175 Difference]: Start difference. First operand has 56 places, 36 transitions, 235 flow. Second operand 8 states and 105 transitions. [2024-06-27 16:35:04,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 92 transitions, 608 flow [2024-06-27 16:35:04,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 92 transitions, 593 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 16:35:04,153 INFO L231 Difference]: Finished difference. Result has 63 places, 41 transitions, 308 flow [2024-06-27 16:35:04,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=308, PETRI_PLACES=63, PETRI_TRANSITIONS=41} [2024-06-27 16:35:04,154 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 38 predicate places. [2024-06-27 16:35:04,154 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 41 transitions, 308 flow [2024-06-27 16:35:04,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:04,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:04,154 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:04,167 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 16:35:04,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:04,365 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:04,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:04,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1555071804, now seen corresponding path program 3 times [2024-06-27 16:35:04,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:04,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687022736] [2024-06-27 16:35:04,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:04,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:04,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:04,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687022736] [2024-06-27 16:35:04,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687022736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:35:04,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:35:04,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:35:04,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794779372] [2024-06-27 16:35:04,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:35:04,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:35:04,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:04,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:35:04,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:35:04,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:04,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 41 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:04,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:04,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:04,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:04,581 INFO L124 PetriNetUnfolderBase]: 473/817 cut-off events. [2024-06-27 16:35:04,581 INFO L125 PetriNetUnfolderBase]: For 2118/2118 co-relation queries the response was YES. [2024-06-27 16:35:04,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2648 conditions, 817 events. 473/817 cut-off events. For 2118/2118 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3603 event pairs, 227 based on Foata normal form. 2/819 useless extension candidates. Maximal degree in co-relation 2625. Up to 469 conditions per place. [2024-06-27 16:35:04,585 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 46 selfloop transitions, 9 changer transitions 7/63 dead transitions. [2024-06-27 16:35:04,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 63 transitions, 499 flow [2024-06-27 16:35:04,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:35:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:35:04,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-06-27 16:35:04,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2024-06-27 16:35:04,586 INFO L175 Difference]: Start difference. First operand has 63 places, 41 transitions, 308 flow. Second operand 5 states and 62 transitions. [2024-06-27 16:35:04,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 63 transitions, 499 flow [2024-06-27 16:35:04,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 63 transitions, 485 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 16:35:04,590 INFO L231 Difference]: Finished difference. Result has 65 places, 40 transitions, 300 flow [2024-06-27 16:35:04,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=300, PETRI_PLACES=65, PETRI_TRANSITIONS=40} [2024-06-27 16:35:04,591 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 40 predicate places. [2024-06-27 16:35:04,591 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 40 transitions, 300 flow [2024-06-27 16:35:04,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:04,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:04,591 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:04,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 16:35:04,592 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:04,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:04,592 INFO L85 PathProgramCache]: Analyzing trace with hash 398039530, now seen corresponding path program 2 times [2024-06-27 16:35:04,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:04,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831113407] [2024-06-27 16:35:04,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:04,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:04,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:04,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:04,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831113407] [2024-06-27 16:35:04,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831113407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:35:04,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:35:04,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:35:04,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068889586] [2024-06-27 16:35:04,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:35:04,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:35:04,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:04,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:35:04,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:35:04,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:04,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 40 transitions, 300 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:04,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:04,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:04,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:04,803 INFO L124 PetriNetUnfolderBase]: 462/798 cut-off events. [2024-06-27 16:35:04,804 INFO L125 PetriNetUnfolderBase]: For 2228/2228 co-relation queries the response was YES. [2024-06-27 16:35:04,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2550 conditions, 798 events. 462/798 cut-off events. For 2228/2228 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3430 event pairs, 221 based on Foata normal form. 3/801 useless extension candidates. Maximal degree in co-relation 2526. Up to 443 conditions per place. [2024-06-27 16:35:04,807 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 40 selfloop transitions, 12 changer transitions 7/60 dead transitions. [2024-06-27 16:35:04,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 60 transitions, 492 flow [2024-06-27 16:35:04,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:35:04,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:35:04,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 58 transitions. [2024-06-27 16:35:04,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4461538461538462 [2024-06-27 16:35:04,808 INFO L175 Difference]: Start difference. First operand has 65 places, 40 transitions, 300 flow. Second operand 5 states and 58 transitions. [2024-06-27 16:35:04,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 60 transitions, 492 flow [2024-06-27 16:35:04,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 60 transitions, 448 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 16:35:04,811 INFO L231 Difference]: Finished difference. Result has 60 places, 42 transitions, 309 flow [2024-06-27 16:35:04,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=309, PETRI_PLACES=60, PETRI_TRANSITIONS=42} [2024-06-27 16:35:04,812 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 35 predicate places. [2024-06-27 16:35:04,812 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 42 transitions, 309 flow [2024-06-27 16:35:04,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:04,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:04,812 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:04,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 16:35:04,813 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:04,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:04,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1066661762, now seen corresponding path program 3 times [2024-06-27 16:35:04,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:04,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248751069] [2024-06-27 16:35:04,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:04,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:04,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:04,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248751069] [2024-06-27 16:35:04,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248751069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:35:04,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:35:04,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:35:04,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007679348] [2024-06-27 16:35:04,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:35:04,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:35:04,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:04,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:35:04,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:35:04,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:04,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 42 transitions, 309 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:04,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:04,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:04,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:05,012 INFO L124 PetriNetUnfolderBase]: 437/749 cut-off events. [2024-06-27 16:35:05,012 INFO L125 PetriNetUnfolderBase]: For 1910/1910 co-relation queries the response was YES. [2024-06-27 16:35:05,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2352 conditions, 749 events. 437/749 cut-off events. For 1910/1910 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3152 event pairs, 184 based on Foata normal form. 8/757 useless extension candidates. Maximal degree in co-relation 2331. Up to 355 conditions per place. [2024-06-27 16:35:05,016 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 44 selfloop transitions, 13 changer transitions 5/63 dead transitions. [2024-06-27 16:35:05,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 63 transitions, 498 flow [2024-06-27 16:35:05,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:35:05,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:35:05,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2024-06-27 16:35:05,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-06-27 16:35:05,017 INFO L175 Difference]: Start difference. First operand has 60 places, 42 transitions, 309 flow. Second operand 5 states and 61 transitions. [2024-06-27 16:35:05,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 63 transitions, 498 flow [2024-06-27 16:35:05,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 63 transitions, 486 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 16:35:05,020 INFO L231 Difference]: Finished difference. Result has 63 places, 42 transitions, 329 flow [2024-06-27 16:35:05,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=329, PETRI_PLACES=63, PETRI_TRANSITIONS=42} [2024-06-27 16:35:05,021 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 38 predicate places. [2024-06-27 16:35:05,021 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 42 transitions, 329 flow [2024-06-27 16:35:05,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:05,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:05,021 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:05,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 16:35:05,022 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:05,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:05,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1458736781, now seen corresponding path program 1 times [2024-06-27 16:35:05,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:05,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720697124] [2024-06-27 16:35:05,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:05,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:05,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:05,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720697124] [2024-06-27 16:35:05,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720697124] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:05,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107381249] [2024-06-27 16:35:05,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:05,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:05,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:05,637 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:05,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 16:35:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:05,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-27 16:35:05,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:06,071 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 182 treesize of output 118 [2024-06-27 16:35:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:06,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:07,601 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:35:07,602 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 237 treesize of output 149 [2024-06-27 16:35:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:07,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107381249] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:07,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:07,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-06-27 16:35:07,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503939680] [2024-06-27 16:35:07,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:07,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 16:35:07,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:07,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 16:35:07,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-06-27 16:35:07,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:07,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 42 transitions, 329 flow. Second operand has 21 states, 21 states have (on average 5.857142857142857) internal successors, (123), 21 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:07,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:07,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:07,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:11,049 INFO L124 PetriNetUnfolderBase]: 1130/1982 cut-off events. [2024-06-27 16:35:11,049 INFO L125 PetriNetUnfolderBase]: For 3514/3514 co-relation queries the response was YES. [2024-06-27 16:35:11,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5683 conditions, 1982 events. 1130/1982 cut-off events. For 3514/3514 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10468 event pairs, 169 based on Foata normal form. 9/1991 useless extension candidates. Maximal degree in co-relation 5661. Up to 351 conditions per place. [2024-06-27 16:35:11,058 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 187 selfloop transitions, 55 changer transitions 35/278 dead transitions. [2024-06-27 16:35:11,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 278 transitions, 1757 flow [2024-06-27 16:35:11,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-06-27 16:35:11,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-06-27 16:35:11,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 351 transitions. [2024-06-27 16:35:11,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-27 16:35:11,060 INFO L175 Difference]: Start difference. First operand has 63 places, 42 transitions, 329 flow. Second operand 33 states and 351 transitions. [2024-06-27 16:35:11,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 278 transitions, 1757 flow [2024-06-27 16:35:11,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 278 transitions, 1669 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 16:35:11,066 INFO L231 Difference]: Finished difference. Result has 100 places, 94 transitions, 785 flow [2024-06-27 16:35:11,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=785, PETRI_PLACES=100, PETRI_TRANSITIONS=94} [2024-06-27 16:35:11,067 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 75 predicate places. [2024-06-27 16:35:11,067 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 94 transitions, 785 flow [2024-06-27 16:35:11,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.857142857142857) internal successors, (123), 21 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:11,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:11,067 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:11,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-06-27 16:35:11,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-06-27 16:35:11,271 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:11,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:11,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1451639513, now seen corresponding path program 2 times [2024-06-27 16:35:11,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:11,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102490052] [2024-06-27 16:35:11,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:11,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:11,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:11,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102490052] [2024-06-27 16:35:11,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102490052] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:11,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215233657] [2024-06-27 16:35:11,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:35:11,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:11,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:11,984 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:12,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 16:35:12,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:35:12,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:12,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:35:12,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:12,358 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 78 treesize of output 50 [2024-06-27 16:35:12,426 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:12,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:13,263 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:35:13,263 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 298 treesize of output 178 [2024-06-27 16:35:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:13,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215233657] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:13,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:13,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 22 [2024-06-27 16:35:13,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236251803] [2024-06-27 16:35:13,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:13,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 16:35:13,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:13,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 16:35:13,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-06-27 16:35:13,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:13,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 94 transitions, 785 flow. Second operand has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:13,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:13,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:13,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:14,498 INFO L124 PetriNetUnfolderBase]: 1259/2213 cut-off events. [2024-06-27 16:35:14,498 INFO L125 PetriNetUnfolderBase]: For 6431/6431 co-relation queries the response was YES. [2024-06-27 16:35:14,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7376 conditions, 2213 events. 1259/2213 cut-off events. For 6431/6431 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12084 event pairs, 616 based on Foata normal form. 1/2214 useless extension candidates. Maximal degree in co-relation 7344. Up to 1484 conditions per place. [2024-06-27 16:35:14,509 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 129 selfloop transitions, 47 changer transitions 13/190 dead transitions. [2024-06-27 16:35:14,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 190 transitions, 1651 flow [2024-06-27 16:35:14,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 16:35:14,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 16:35:14,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 158 transitions. [2024-06-27 16:35:14,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798076923076923 [2024-06-27 16:35:14,510 INFO L175 Difference]: Start difference. First operand has 100 places, 94 transitions, 785 flow. Second operand 16 states and 158 transitions. [2024-06-27 16:35:14,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 190 transitions, 1651 flow [2024-06-27 16:35:14,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 190 transitions, 1472 flow, removed 71 selfloop flow, removed 8 redundant places. [2024-06-27 16:35:14,526 INFO L231 Difference]: Finished difference. Result has 109 places, 125 transitions, 1091 flow [2024-06-27 16:35:14,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1091, PETRI_PLACES=109, PETRI_TRANSITIONS=125} [2024-06-27 16:35:14,527 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 84 predicate places. [2024-06-27 16:35:14,527 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 125 transitions, 1091 flow [2024-06-27 16:35:14,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:14,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:14,527 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:14,538 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 16:35:14,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-06-27 16:35:14,731 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:14,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:14,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1197780077, now seen corresponding path program 3 times [2024-06-27 16:35:14,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:14,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942427629] [2024-06-27 16:35:14,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:14,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:14,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:15,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:15,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942427629] [2024-06-27 16:35:15,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942427629] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:15,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899991517] [2024-06-27 16:35:15,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:35:15,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:15,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:15,354 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:15,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 16:35:15,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:35:15,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:15,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 34 conjunts are in the unsatisfiable core [2024-06-27 16:35:15,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:15,593 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 158 treesize of output 102 [2024-06-27 16:35:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:15,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:17,097 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:35:17,098 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 207 treesize of output 143 [2024-06-27 16:35:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:17,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899991517] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:17,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:17,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2024-06-27 16:35:17,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759926080] [2024-06-27 16:35:17,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:17,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 16:35:17,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:17,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 16:35:17,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2024-06-27 16:35:17,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:17,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 125 transitions, 1091 flow. Second operand has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 23 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:17,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:17,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:17,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:18,743 INFO L124 PetriNetUnfolderBase]: 1359/2417 cut-off events. [2024-06-27 16:35:18,743 INFO L125 PetriNetUnfolderBase]: For 8803/8803 co-relation queries the response was YES. [2024-06-27 16:35:18,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8485 conditions, 2417 events. 1359/2417 cut-off events. For 8803/8803 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13564 event pairs, 513 based on Foata normal form. 2/2419 useless extension candidates. Maximal degree in co-relation 8453. Up to 1148 conditions per place. [2024-06-27 16:35:18,753 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 139 selfloop transitions, 75 changer transitions 20/235 dead transitions. [2024-06-27 16:35:18,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 235 transitions, 2073 flow [2024-06-27 16:35:18,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 16:35:18,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 16:35:18,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 209 transitions. [2024-06-27 16:35:18,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3494983277591973 [2024-06-27 16:35:18,755 INFO L175 Difference]: Start difference. First operand has 109 places, 125 transitions, 1091 flow. Second operand 23 states and 209 transitions. [2024-06-27 16:35:18,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 235 transitions, 2073 flow [2024-06-27 16:35:18,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 235 transitions, 1926 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-27 16:35:18,784 INFO L231 Difference]: Finished difference. Result has 140 places, 156 transitions, 1444 flow [2024-06-27 16:35:18,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=944, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1444, PETRI_PLACES=140, PETRI_TRANSITIONS=156} [2024-06-27 16:35:18,784 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 115 predicate places. [2024-06-27 16:35:18,784 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 156 transitions, 1444 flow [2024-06-27 16:35:18,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 23 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:18,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:18,785 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:18,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 16:35:18,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:18,996 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 16:35:18,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:18,996 INFO L85 PathProgramCache]: Analyzing trace with hash 722250533, now seen corresponding path program 4 times [2024-06-27 16:35:18,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:18,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287107431] [2024-06-27 16:35:18,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:18,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:19,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:19,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287107431] [2024-06-27 16:35:19,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287107431] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:19,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771759643] [2024-06-27 16:35:19,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:35:19,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:19,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:19,517 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:19,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 16:35:19,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:35:19,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:19,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 34 conjunts are in the unsatisfiable core [2024-06-27 16:35:19,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:19,883 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 182 treesize of output 118 [2024-06-27 16:35:20,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:20,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:21,276 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:35:21,276 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 421 treesize of output 261 [2024-06-27 16:35:21,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:21,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771759643] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:21,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:21,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2024-06-27 16:35:21,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099270800] [2024-06-27 16:35:21,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:21,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 16:35:21,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:21,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 16:35:21,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-06-27 16:35:21,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:21,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 156 transitions, 1444 flow. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:21,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:21,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:21,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:23,927 INFO L124 PetriNetUnfolderBase]: 1628/2959 cut-off events. [2024-06-27 16:35:23,927 INFO L125 PetriNetUnfolderBase]: For 20793/20793 co-relation queries the response was YES. [2024-06-27 16:35:23,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13904 conditions, 2959 events. 1628/2959 cut-off events. For 20793/20793 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17736 event pairs, 533 based on Foata normal form. 9/2968 useless extension candidates. Maximal degree in co-relation 13858. Up to 1188 conditions per place. [2024-06-27 16:35:23,966 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 160 selfloop transitions, 103 changer transitions 23/287 dead transitions. [2024-06-27 16:35:23,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 287 transitions, 3027 flow [2024-06-27 16:35:23,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:35:23,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:35:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 230 transitions. [2024-06-27 16:35:23,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4020979020979021 [2024-06-27 16:35:23,968 INFO L175 Difference]: Start difference. First operand has 140 places, 156 transitions, 1444 flow. Second operand 22 states and 230 transitions. [2024-06-27 16:35:23,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 287 transitions, 3027 flow [2024-06-27 16:35:24,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 287 transitions, 2896 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-27 16:35:24,119 INFO L231 Difference]: Finished difference. Result has 160 places, 185 transitions, 1953 flow [2024-06-27 16:35:24,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1953, PETRI_PLACES=160, PETRI_TRANSITIONS=185} [2024-06-27 16:35:24,119 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 135 predicate places. [2024-06-27 16:35:24,120 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 185 transitions, 1953 flow [2024-06-27 16:35:24,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:24,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:24,120 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:24,132 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 16:35:24,328 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,SelfDestructingSolverStorable16 [2024-06-27 16:35:24,329 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 16:35:24,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:24,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1526143479, now seen corresponding path program 5 times [2024-06-27 16:35:24,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:24,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243367898] [2024-06-27 16:35:24,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:24,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:24,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:24,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:24,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243367898] [2024-06-27 16:35:24,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243367898] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:24,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900226251] [2024-06-27 16:35:24,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:35:24,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:24,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:24,893 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 16:35:24,913 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 16:35:25,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 16:35:25,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:25,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 16:35:25,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:25,209 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 158 treesize of output 102 [2024-06-27 16:35:25,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:25,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:26,336 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:35:26,337 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 193 treesize of output 137 [2024-06-27 16:35:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:26,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900226251] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:26,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:26,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-06-27 16:35:26,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970290819] [2024-06-27 16:35:26,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:26,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 16:35:26,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:26,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 16:35:26,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-06-27 16:35:26,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:26,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 185 transitions, 1953 flow. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:26,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:26,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:26,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:27,686 INFO L124 PetriNetUnfolderBase]: 1677/3063 cut-off events. [2024-06-27 16:35:27,687 INFO L125 PetriNetUnfolderBase]: For 27324/27324 co-relation queries the response was YES. [2024-06-27 16:35:27,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15406 conditions, 3063 events. 1677/3063 cut-off events. For 27324/27324 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18653 event pairs, 746 based on Foata normal form. 2/3065 useless extension candidates. Maximal degree in co-relation 15354. Up to 1602 conditions per place. [2024-06-27 16:35:27,705 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 186 selfloop transitions, 85 changer transitions 11/283 dead transitions. [2024-06-27 16:35:27,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 283 transitions, 3306 flow [2024-06-27 16:35:27,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:35:27,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:35:27,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 142 transitions. [2024-06-27 16:35:27,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3901098901098901 [2024-06-27 16:35:27,706 INFO L175 Difference]: Start difference. First operand has 160 places, 185 transitions, 1953 flow. Second operand 14 states and 142 transitions. [2024-06-27 16:35:27,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 283 transitions, 3306 flow [2024-06-27 16:35:27,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 283 transitions, 3151 flow, removed 66 selfloop flow, removed 8 redundant places. [2024-06-27 16:35:27,821 INFO L231 Difference]: Finished difference. Result has 171 places, 205 transitions, 2330 flow [2024-06-27 16:35:27,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2330, PETRI_PLACES=171, PETRI_TRANSITIONS=205} [2024-06-27 16:35:27,822 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 146 predicate places. [2024-06-27 16:35:27,822 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 205 transitions, 2330 flow [2024-06-27 16:35:27,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:27,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:27,822 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:27,833 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 16:35:28,033 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,SelfDestructingSolverStorable17 [2024-06-27 16:35:28,033 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 16:35:28,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:28,034 INFO L85 PathProgramCache]: Analyzing trace with hash -700196031, now seen corresponding path program 6 times [2024-06-27 16:35:28,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:28,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116588828] [2024-06-27 16:35:28,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:28,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:28,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:28,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116588828] [2024-06-27 16:35:28,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116588828] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:28,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972821428] [2024-06-27 16:35:28,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:35:28,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:28,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:28,531 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 16:35:28,549 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 16:35:28,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:35:28,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:28,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 16:35:28,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:28,848 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 138 treesize of output 90 [2024-06-27 16:35:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:28,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:30,066 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:35:30,066 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 223 treesize of output 151 [2024-06-27 16:35:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:30,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972821428] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:30,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:30,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 22 [2024-06-27 16:35:30,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869533426] [2024-06-27 16:35:30,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:30,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 16:35:30,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:30,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 16:35:30,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2024-06-27 16:35:30,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:30,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 205 transitions, 2330 flow. Second operand has 22 states, 22 states have (on average 5.5) internal successors, (121), 22 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:30,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:30,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:30,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:31,594 INFO L124 PetriNetUnfolderBase]: 1836/3377 cut-off events. [2024-06-27 16:35:31,595 INFO L125 PetriNetUnfolderBase]: For 34692/34692 co-relation queries the response was YES. [2024-06-27 16:35:31,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17949 conditions, 3377 events. 1836/3377 cut-off events. For 34692/34692 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 21277 event pairs, 583 based on Foata normal form. 2/3379 useless extension candidates. Maximal degree in co-relation 17892. Up to 1319 conditions per place. [2024-06-27 16:35:31,613 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 153 selfloop transitions, 152 changer transitions 20/326 dead transitions. [2024-06-27 16:35:31,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 326 transitions, 4107 flow [2024-06-27 16:35:31,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:35:31,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:35:31,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 195 transitions. [2024-06-27 16:35:31,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3409090909090909 [2024-06-27 16:35:31,624 INFO L175 Difference]: Start difference. First operand has 171 places, 205 transitions, 2330 flow. Second operand 22 states and 195 transitions. [2024-06-27 16:35:31,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 326 transitions, 4107 flow [2024-06-27 16:35:31,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 326 transitions, 3963 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-27 16:35:31,769 INFO L231 Difference]: Finished difference. Result has 194 places, 246 transitions, 3151 flow [2024-06-27 16:35:31,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2233, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3151, PETRI_PLACES=194, PETRI_TRANSITIONS=246} [2024-06-27 16:35:31,769 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 169 predicate places. [2024-06-27 16:35:31,770 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 246 transitions, 3151 flow [2024-06-27 16:35:31,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.5) internal successors, (121), 22 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:31,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:31,770 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:31,797 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 16:35:31,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:31,982 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 16:35:31,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:31,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1261059467, now seen corresponding path program 7 times [2024-06-27 16:35:31,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:31,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794531789] [2024-06-27 16:35:31,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:31,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:32,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:32,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794531789] [2024-06-27 16:35:32,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794531789] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:32,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899451392] [2024-06-27 16:35:32,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:35:32,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:32,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:32,521 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 16:35:32,548 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 16:35:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:32,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 16:35:32,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:32,876 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 203 treesize of output 131 [2024-06-27 16:35:33,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:33,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:34,258 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:35:34,258 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 259 treesize of output 159 [2024-06-27 16:35:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:34,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899451392] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:34,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:34,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-06-27 16:35:34,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914411611] [2024-06-27 16:35:34,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:34,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 16:35:34,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:34,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 16:35:34,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-06-27 16:35:34,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:34,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 246 transitions, 3151 flow. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:34,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:34,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:34,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:37,635 INFO L124 PetriNetUnfolderBase]: 2517/4766 cut-off events. [2024-06-27 16:35:37,635 INFO L125 PetriNetUnfolderBase]: For 65179/65179 co-relation queries the response was YES. [2024-06-27 16:35:37,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27577 conditions, 4766 events. 2517/4766 cut-off events. For 65179/65179 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 32202 event pairs, 600 based on Foata normal form. 11/4777 useless extension candidates. Maximal degree in co-relation 27514. Up to 899 conditions per place. [2024-06-27 16:35:37,665 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 287 selfloop transitions, 161 changer transitions 39/488 dead transitions. [2024-06-27 16:35:37,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 488 transitions, 6736 flow [2024-06-27 16:35:37,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 16:35:37,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 16:35:37,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 304 transitions. [2024-06-27 16:35:37,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3771712158808933 [2024-06-27 16:35:37,667 INFO L175 Difference]: Start difference. First operand has 194 places, 246 transitions, 3151 flow. Second operand 31 states and 304 transitions. [2024-06-27 16:35:37,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 488 transitions, 6736 flow [2024-06-27 16:35:38,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 488 transitions, 6355 flow, removed 187 selfloop flow, removed 4 redundant places. [2024-06-27 16:35:38,155 INFO L231 Difference]: Finished difference. Result has 232 places, 312 transitions, 4436 flow [2024-06-27 16:35:38,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2986, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4436, PETRI_PLACES=232, PETRI_TRANSITIONS=312} [2024-06-27 16:35:38,160 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 207 predicate places. [2024-06-27 16:35:38,160 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 312 transitions, 4436 flow [2024-06-27 16:35:38,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:38,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:38,161 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:38,172 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 16:35:38,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:38,368 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 16:35:38,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:38,369 INFO L85 PathProgramCache]: Analyzing trace with hash -2001931132, now seen corresponding path program 8 times [2024-06-27 16:35:38,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:38,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098789053] [2024-06-27 16:35:38,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:38,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:38,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:38,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:38,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098789053] [2024-06-27 16:35:38,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098789053] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:38,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818087053] [2024-06-27 16:35:38,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:35:38,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:38,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:38,729 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 16:35:38,729 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 16:35:38,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:35:38,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:38,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-27 16:35:38,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:38,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:39,105 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:35:39,105 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 44 treesize of output 28 [2024-06-27 16:35:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:39,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818087053] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:39,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:39,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2024-06-27 16:35:39,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101648389] [2024-06-27 16:35:39,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:39,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:35:39,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:39,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:35:39,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:35:39,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:39,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 312 transitions, 4436 flow. Second operand has 19 states, 19 states have (on average 5.894736842105263) internal successors, (112), 19 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:39,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:39,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:39,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:40,410 INFO L124 PetriNetUnfolderBase]: 2610/4907 cut-off events. [2024-06-27 16:35:40,410 INFO L125 PetriNetUnfolderBase]: For 58406/58406 co-relation queries the response was YES. [2024-06-27 16:35:40,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28459 conditions, 4907 events. 2610/4907 cut-off events. For 58406/58406 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 33381 event pairs, 483 based on Foata normal form. 27/4934 useless extension candidates. Maximal degree in co-relation 28384. Up to 1262 conditions per place. [2024-06-27 16:35:40,449 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 266 selfloop transitions, 157 changer transitions 8/432 dead transitions. [2024-06-27 16:35:40,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 432 transitions, 6525 flow [2024-06-27 16:35:40,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:35:40,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:35:40,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 195 transitions. [2024-06-27 16:35:40,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-27 16:35:40,451 INFO L175 Difference]: Start difference. First operand has 232 places, 312 transitions, 4436 flow. Second operand 21 states and 195 transitions. [2024-06-27 16:35:40,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 432 transitions, 6525 flow [2024-06-27 16:35:40,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 432 transitions, 6057 flow, removed 176 selfloop flow, removed 8 redundant places. [2024-06-27 16:35:40,828 INFO L231 Difference]: Finished difference. Result has 252 places, 338 transitions, 4858 flow [2024-06-27 16:35:40,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4080, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4858, PETRI_PLACES=252, PETRI_TRANSITIONS=338} [2024-06-27 16:35:40,829 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 227 predicate places. [2024-06-27 16:35:40,829 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 338 transitions, 4858 flow [2024-06-27 16:35:40,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.894736842105263) internal successors, (112), 19 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:40,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:40,829 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:40,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-06-27 16:35:41,038 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,SelfDestructingSolverStorable20 [2024-06-27 16:35:41,038 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 16:35:41,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:41,039 INFO L85 PathProgramCache]: Analyzing trace with hash -99982560, now seen corresponding path program 9 times [2024-06-27 16:35:41,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:41,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939004368] [2024-06-27 16:35:41,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:41,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:41,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:41,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939004368] [2024-06-27 16:35:41,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939004368] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:41,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016064588] [2024-06-27 16:35:41,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:35:41,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:41,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:41,383 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 16:35:41,384 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 16:35:41,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:35:41,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:41,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjunts are in the unsatisfiable core [2024-06-27 16:35:41,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:41,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:35:41,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-06-27 16:35:41,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-06-27 16:35:41,684 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 91 treesize of output 59 [2024-06-27 16:35:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:35:41,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:41,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016064588] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:41,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:41,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 8] total 24 [2024-06-27 16:35:41,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117763195] [2024-06-27 16:35:41,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:41,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:35:41,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:41,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:35:41,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2024-06-27 16:35:41,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:41,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 338 transitions, 4858 flow. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:41,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:41,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:41,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:43,063 INFO L124 PetriNetUnfolderBase]: 2494/4677 cut-off events. [2024-06-27 16:35:43,063 INFO L125 PetriNetUnfolderBase]: For 92126/92126 co-relation queries the response was YES. [2024-06-27 16:35:43,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31767 conditions, 4677 events. 2494/4677 cut-off events. For 92126/92126 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 31514 event pairs, 1111 based on Foata normal form. 24/4701 useless extension candidates. Maximal degree in co-relation 31685. Up to 2445 conditions per place. [2024-06-27 16:35:43,095 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 293 selfloop transitions, 102 changer transitions 9/405 dead transitions. [2024-06-27 16:35:43,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 405 transitions, 6382 flow [2024-06-27 16:35:43,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:35:43,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:35:43,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 142 transitions. [2024-06-27 16:35:43,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3901098901098901 [2024-06-27 16:35:43,096 INFO L175 Difference]: Start difference. First operand has 252 places, 338 transitions, 4858 flow. Second operand 14 states and 142 transitions. [2024-06-27 16:35:43,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 405 transitions, 6382 flow [2024-06-27 16:35:43,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 405 transitions, 6120 flow, removed 49 selfloop flow, removed 10 redundant places. [2024-06-27 16:35:43,393 INFO L231 Difference]: Finished difference. Result has 256 places, 346 transitions, 5039 flow [2024-06-27 16:35:43,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4518, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5039, PETRI_PLACES=256, PETRI_TRANSITIONS=346} [2024-06-27 16:35:43,393 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 231 predicate places. [2024-06-27 16:35:43,393 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 346 transitions, 5039 flow [2024-06-27 16:35:43,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:43,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:43,394 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:43,407 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 16:35:43,607 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,SelfDestructingSolverStorable21 [2024-06-27 16:35:43,608 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 16:35:43,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:43,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1009560928, now seen corresponding path program 10 times [2024-06-27 16:35:43,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:43,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350327342] [2024-06-27 16:35:43,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:43,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:43,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:43,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350327342] [2024-06-27 16:35:43,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350327342] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:43,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480234808] [2024-06-27 16:35:43,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:35:43,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:43,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:43,918 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 16:35:43,919 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 16:35:44,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:35:44,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:44,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:35:44,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:44,194 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 112 treesize of output 72 [2024-06-27 16:35:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:44,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:44,491 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:35:44,492 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 44 treesize of output 28 [2024-06-27 16:35:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:44,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480234808] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:44,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:44,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-06-27 16:35:44,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392261272] [2024-06-27 16:35:44,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:44,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 16:35:44,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:44,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 16:35:44,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2024-06-27 16:35:44,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:44,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 346 transitions, 5039 flow. Second operand has 20 states, 20 states have (on average 5.85) internal successors, (117), 20 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:44,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:44,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:44,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:46,591 INFO L124 PetriNetUnfolderBase]: 2625/4940 cut-off events. [2024-06-27 16:35:46,592 INFO L125 PetriNetUnfolderBase]: For 113625/113625 co-relation queries the response was YES. [2024-06-27 16:35:46,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34800 conditions, 4940 events. 2625/4940 cut-off events. For 113625/113625 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 33616 event pairs, 327 based on Foata normal form. 17/4957 useless extension candidates. Maximal degree in co-relation 34716. Up to 1076 conditions per place. [2024-06-27 16:35:46,714 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 297 selfloop transitions, 238 changer transitions 15/551 dead transitions. [2024-06-27 16:35:46,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 551 transitions, 8601 flow [2024-06-27 16:35:46,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-06-27 16:35:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-06-27 16:35:46,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 379 transitions. [2024-06-27 16:35:46,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38360323886639675 [2024-06-27 16:35:46,715 INFO L175 Difference]: Start difference. First operand has 256 places, 346 transitions, 5039 flow. Second operand 38 states and 379 transitions. [2024-06-27 16:35:46,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 551 transitions, 8601 flow [2024-06-27 16:35:47,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 551 transitions, 8316 flow, removed 89 selfloop flow, removed 8 redundant places. [2024-06-27 16:35:47,068 INFO L231 Difference]: Finished difference. Result has 291 places, 369 transitions, 5767 flow [2024-06-27 16:35:47,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4758, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=5767, PETRI_PLACES=291, PETRI_TRANSITIONS=369} [2024-06-27 16:35:47,069 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 266 predicate places. [2024-06-27 16:35:47,069 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 369 transitions, 5767 flow [2024-06-27 16:35:47,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.85) internal successors, (117), 20 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:47,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:47,070 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:47,083 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 16:35:47,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:47,281 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 16:35:47,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:47,282 INFO L85 PathProgramCache]: Analyzing trace with hash 683749024, now seen corresponding path program 11 times [2024-06-27 16:35:47,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:47,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181840335] [2024-06-27 16:35:47,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:47,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:47,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:47,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181840335] [2024-06-27 16:35:47,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181840335] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:47,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855972309] [2024-06-27 16:35:47,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:35:47,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:47,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:47,605 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 16:35:47,606 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 16:35:47,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 16:35:47,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:47,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 16:35:47,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:47,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:35:47,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 16:35:47,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 16:35:47,887 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 61 treesize of output 37 [2024-06-27 16:35:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:35:47,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:48,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855972309] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:48,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:48,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 8] total 24 [2024-06-27 16:35:48,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760325630] [2024-06-27 16:35:48,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:48,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:35:48,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:48,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:35:48,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2024-06-27 16:35:48,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:48,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 369 transitions, 5767 flow. Second operand has 24 states, 24 states have (on average 5.375) internal successors, (129), 24 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 16:35:48,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:48,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:48,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:49,371 INFO L124 PetriNetUnfolderBase]: 2622/4937 cut-off events. [2024-06-27 16:35:49,372 INFO L125 PetriNetUnfolderBase]: For 114515/114515 co-relation queries the response was YES. [2024-06-27 16:35:49,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34892 conditions, 4937 events. 2622/4937 cut-off events. For 114515/114515 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 33865 event pairs, 1286 based on Foata normal form. 3/4940 useless extension candidates. Maximal degree in co-relation 34801. Up to 2704 conditions per place. [2024-06-27 16:35:49,406 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 326 selfloop transitions, 87 changer transitions 15/429 dead transitions. [2024-06-27 16:35:49,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 429 transitions, 7253 flow [2024-06-27 16:35:49,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 16:35:49,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 16:35:49,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 109 transitions. [2024-06-27 16:35:49,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34935897435897434 [2024-06-27 16:35:49,410 INFO L175 Difference]: Start difference. First operand has 291 places, 369 transitions, 5767 flow. Second operand 12 states and 109 transitions. [2024-06-27 16:35:49,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 429 transitions, 7253 flow [2024-06-27 16:35:49,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 429 transitions, 6813 flow, removed 44 selfloop flow, removed 22 redundant places. [2024-06-27 16:35:49,769 INFO L231 Difference]: Finished difference. Result has 282 places, 366 transitions, 5491 flow [2024-06-27 16:35:49,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5313, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5491, PETRI_PLACES=282, PETRI_TRANSITIONS=366} [2024-06-27 16:35:49,770 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 257 predicate places. [2024-06-27 16:35:49,770 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 366 transitions, 5491 flow [2024-06-27 16:35:49,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.375) internal successors, (129), 24 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 16:35:49,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:49,770 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:49,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-06-27 16:35:49,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:49,981 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 16:35:49,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:49,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1332979028, now seen corresponding path program 12 times [2024-06-27 16:35:49,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:49,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459107228] [2024-06-27 16:35:49,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:49,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:50,352 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:50,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:50,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459107228] [2024-06-27 16:35:50,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459107228] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:50,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122667766] [2024-06-27 16:35:50,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:35:50,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:50,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:50,354 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 16:35:50,355 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 16:35:50,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:35:50,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:50,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 16:35:50,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:50,632 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:50,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:50,775 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 16:35:50,775 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 40 treesize of output 19 [2024-06-27 16:35:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:50,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122667766] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:50,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:50,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 18 [2024-06-27 16:35:50,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052046742] [2024-06-27 16:35:50,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:50,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:35:50,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:50,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:35:50,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:35:50,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:50,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 366 transitions, 5491 flow. Second operand has 18 states, 18 states have (on average 5.944444444444445) internal successors, (107), 18 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:50,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:50,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:50,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:52,130 INFO L124 PetriNetUnfolderBase]: 2538/4747 cut-off events. [2024-06-27 16:35:52,130 INFO L125 PetriNetUnfolderBase]: For 112307/112307 co-relation queries the response was YES. [2024-06-27 16:35:52,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34385 conditions, 4747 events. 2538/4747 cut-off events. For 112307/112307 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 31898 event pairs, 360 based on Foata normal form. 21/4768 useless extension candidates. Maximal degree in co-relation 34294. Up to 1002 conditions per place. [2024-06-27 16:35:52,170 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 247 selfloop transitions, 214 changer transitions 4/466 dead transitions. [2024-06-27 16:35:52,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 466 transitions, 7544 flow [2024-06-27 16:35:52,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 16:35:52,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 16:35:52,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 204 transitions. [2024-06-27 16:35:52,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3411371237458194 [2024-06-27 16:35:52,171 INFO L175 Difference]: Start difference. First operand has 282 places, 366 transitions, 5491 flow. Second operand 23 states and 204 transitions. [2024-06-27 16:35:52,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 466 transitions, 7544 flow [2024-06-27 16:35:52,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 466 transitions, 7287 flow, removed 24 selfloop flow, removed 13 redundant places. [2024-06-27 16:35:52,547 INFO L231 Difference]: Finished difference. Result has 288 places, 379 transitions, 6023 flow [2024-06-27 16:35:52,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5133, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=6023, PETRI_PLACES=288, PETRI_TRANSITIONS=379} [2024-06-27 16:35:52,547 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 263 predicate places. [2024-06-27 16:35:52,548 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 379 transitions, 6023 flow [2024-06-27 16:35:52,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.944444444444445) internal successors, (107), 18 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:52,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:52,548 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:52,560 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 16:35:52,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-06-27 16:35:52,759 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 16:35:52,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:52,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1446200206, now seen corresponding path program 13 times [2024-06-27 16:35:52,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:52,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965914523] [2024-06-27 16:35:52,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:52,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:53,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:53,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965914523] [2024-06-27 16:35:53,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965914523] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:53,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645365064] [2024-06-27 16:35:53,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:35:53,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:53,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:53,043 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 16:35:53,044 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 16:35:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:53,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjunts are in the unsatisfiable core [2024-06-27 16:35:53,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:53,248 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 61 treesize of output 37 [2024-06-27 16:35:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:53,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:53,382 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 16:35:53,382 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 109 treesize of output 56 [2024-06-27 16:35:53,401 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:53,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645365064] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:53,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:53,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 20 [2024-06-27 16:35:53,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920940874] [2024-06-27 16:35:53,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:53,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 16:35:53,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:53,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 16:35:53,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-06-27 16:35:53,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:53,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 379 transitions, 6023 flow. Second operand has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:53,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:53,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:53,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:54,522 INFO L124 PetriNetUnfolderBase]: 2517/4692 cut-off events. [2024-06-27 16:35:54,522 INFO L125 PetriNetUnfolderBase]: For 113434/113434 co-relation queries the response was YES. [2024-06-27 16:35:54,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33963 conditions, 4692 events. 2517/4692 cut-off events. For 113434/113434 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 31409 event pairs, 1031 based on Foata normal form. 3/4695 useless extension candidates. Maximal degree in co-relation 33876. Up to 2175 conditions per place. [2024-06-27 16:35:54,559 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 267 selfloop transitions, 138 changer transitions 11/417 dead transitions. [2024-06-27 16:35:54,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 417 transitions, 7213 flow [2024-06-27 16:35:54,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:35:54,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:35:54,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 118 transitions. [2024-06-27 16:35:54,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34911242603550297 [2024-06-27 16:35:54,561 INFO L175 Difference]: Start difference. First operand has 288 places, 379 transitions, 6023 flow. Second operand 13 states and 118 transitions. [2024-06-27 16:35:54,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 417 transitions, 7213 flow [2024-06-27 16:35:54,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 417 transitions, 7092 flow, removed 28 selfloop flow, removed 11 redundant places. [2024-06-27 16:35:54,942 INFO L231 Difference]: Finished difference. Result has 287 places, 373 transitions, 6100 flow [2024-06-27 16:35:54,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5870, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6100, PETRI_PLACES=287, PETRI_TRANSITIONS=373} [2024-06-27 16:35:54,943 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 262 predicate places. [2024-06-27 16:35:54,943 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 373 transitions, 6100 flow [2024-06-27 16:35:54,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:54,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:54,943 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:54,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-06-27 16:35:55,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-06-27 16:35:55,150 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 16:35:55,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:55,150 INFO L85 PathProgramCache]: Analyzing trace with hash 108091056, now seen corresponding path program 14 times [2024-06-27 16:35:55,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:55,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255747535] [2024-06-27 16:35:55,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:55,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:55,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:55,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255747535] [2024-06-27 16:35:55,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255747535] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:55,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406618064] [2024-06-27 16:35:55,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:35:55,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:55,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:55,450 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 16:35:55,451 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 16:35:55,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:35:55,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:55,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:35:55,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:55,746 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:55,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:55,859 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:35:55,860 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 54 treesize of output 30 [2024-06-27 16:35:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:55,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406618064] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:55,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:55,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 18 [2024-06-27 16:35:55,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056511990] [2024-06-27 16:35:55,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:55,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:35:55,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:55,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:35:55,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:35:55,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:55,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 373 transitions, 6100 flow. Second operand has 18 states, 18 states have (on average 6.055555555555555) internal successors, (109), 18 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:55,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:55,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:55,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:57,085 INFO L124 PetriNetUnfolderBase]: 2597/4829 cut-off events. [2024-06-27 16:35:57,085 INFO L125 PetriNetUnfolderBase]: For 122479/122479 co-relation queries the response was YES. [2024-06-27 16:35:57,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35464 conditions, 4829 events. 2597/4829 cut-off events. For 122479/122479 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 32460 event pairs, 1135 based on Foata normal form. 24/4853 useless extension candidates. Maximal degree in co-relation 35379. Up to 2603 conditions per place. [2024-06-27 16:35:57,124 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 269 selfloop transitions, 156 changer transitions 8/434 dead transitions. [2024-06-27 16:35:57,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 434 transitions, 7846 flow [2024-06-27 16:35:57,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 16:35:57,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 16:35:57,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 144 transitions. [2024-06-27 16:35:57,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36923076923076925 [2024-06-27 16:35:57,126 INFO L175 Difference]: Start difference. First operand has 287 places, 373 transitions, 6100 flow. Second operand 15 states and 144 transitions. [2024-06-27 16:35:57,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 434 transitions, 7846 flow [2024-06-27 16:35:57,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 434 transitions, 7540 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-06-27 16:35:57,526 INFO L231 Difference]: Finished difference. Result has 288 places, 381 transitions, 6300 flow [2024-06-27 16:35:57,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5834, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6300, PETRI_PLACES=288, PETRI_TRANSITIONS=381} [2024-06-27 16:35:57,527 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 263 predicate places. [2024-06-27 16:35:57,527 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 381 transitions, 6300 flow [2024-06-27 16:35:57,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.055555555555555) internal successors, (109), 18 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:57,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:57,527 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:57,544 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 16:35:57,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-06-27 16:35:57,738 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:57,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:57,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1334525462, now seen corresponding path program 15 times [2024-06-27 16:35:57,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:57,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585190760] [2024-06-27 16:35:57,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:57,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:58,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:58,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585190760] [2024-06-27 16:35:58,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585190760] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:58,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865004425] [2024-06-27 16:35:58,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:35:58,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:58,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:58,032 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 16:35:58,036 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 16:35:58,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:35:58,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:58,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 42 conjunts are in the unsatisfiable core [2024-06-27 16:35:58,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:58,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:35:58,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-06-27 16:35:58,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-06-27 16:35:58,329 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 91 treesize of output 59 [2024-06-27 16:35:58,397 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:35:58,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:35:58,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865004425] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:58,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:58,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 8] total 23 [2024-06-27 16:35:58,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327779645] [2024-06-27 16:35:58,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:58,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 16:35:58,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:58,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 16:35:58,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2024-06-27 16:35:58,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:35:58,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 381 transitions, 6300 flow. Second operand has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:58,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:58,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:35:58,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:00,381 INFO L124 PetriNetUnfolderBase]: 2884/5302 cut-off events. [2024-06-27 16:36:00,381 INFO L125 PetriNetUnfolderBase]: For 127516/127516 co-relation queries the response was YES. [2024-06-27 16:36:00,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38691 conditions, 5302 events. 2884/5302 cut-off events. For 127516/127516 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 35995 event pairs, 364 based on Foata normal form. 18/5320 useless extension candidates. Maximal degree in co-relation 38605. Up to 2689 conditions per place. [2024-06-27 16:36:00,426 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 332 selfloop transitions, 214 changer transitions 15/562 dead transitions. [2024-06-27 16:36:00,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 562 transitions, 9661 flow [2024-06-27 16:36:00,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-06-27 16:36:00,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-06-27 16:36:00,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 294 transitions. [2024-06-27 16:36:00,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3769230769230769 [2024-06-27 16:36:00,431 INFO L175 Difference]: Start difference. First operand has 288 places, 381 transitions, 6300 flow. Second operand 30 states and 294 transitions. [2024-06-27 16:36:00,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 562 transitions, 9661 flow [2024-06-27 16:36:00,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 562 transitions, 9586 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 16:36:00,939 INFO L231 Difference]: Finished difference. Result has 321 places, 423 transitions, 7726 flow [2024-06-27 16:36:00,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6233, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=7726, PETRI_PLACES=321, PETRI_TRANSITIONS=423} [2024-06-27 16:36:00,947 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 296 predicate places. [2024-06-27 16:36:00,947 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 423 transitions, 7726 flow [2024-06-27 16:36:00,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:00,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:00,947 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:00,958 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 16:36:01,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:01,159 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:01,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:01,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1454004526, now seen corresponding path program 16 times [2024-06-27 16:36:01,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:01,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045101032] [2024-06-27 16:36:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:01,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:01,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:01,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:01,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045101032] [2024-06-27 16:36:01,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045101032] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:01,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488047421] [2024-06-27 16:36:01,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:36:01,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:01,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:01,446 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 16:36:01,472 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 16:36:01,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:36:01,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:36:01,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:36:01,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:01,778 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 91 treesize of output 59 [2024-06-27 16:36:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:01,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:01,992 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:36:01,992 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 95 treesize of output 55 [2024-06-27 16:36:02,055 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:02,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488047421] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:02,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:02,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2024-06-27 16:36:02,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326548934] [2024-06-27 16:36:02,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:02,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 16:36:02,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:02,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 16:36:02,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2024-06-27 16:36:02,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:36:02,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 423 transitions, 7726 flow. Second operand has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:02,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:02,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:36:02,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:03,453 INFO L124 PetriNetUnfolderBase]: 2856/5283 cut-off events. [2024-06-27 16:36:03,453 INFO L125 PetriNetUnfolderBase]: For 173496/173496 co-relation queries the response was YES. [2024-06-27 16:36:03,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42565 conditions, 5283 events. 2856/5283 cut-off events. For 173496/173496 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 35978 event pairs, 1148 based on Foata normal form. 30/5313 useless extension candidates. Maximal degree in co-relation 42468. Up to 2735 conditions per place. [2024-06-27 16:36:03,500 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 279 selfloop transitions, 208 changer transitions 7/495 dead transitions. [2024-06-27 16:36:03,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 495 transitions, 9785 flow [2024-06-27 16:36:03,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 16:36:03,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 16:36:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 184 transitions. [2024-06-27 16:36:03,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39316239316239315 [2024-06-27 16:36:03,501 INFO L175 Difference]: Start difference. First operand has 321 places, 423 transitions, 7726 flow. Second operand 18 states and 184 transitions. [2024-06-27 16:36:03,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 495 transitions, 9785 flow [2024-06-27 16:36:04,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 495 transitions, 9524 flow, removed 88 selfloop flow, removed 13 redundant places. [2024-06-27 16:36:04,170 INFO L231 Difference]: Finished difference. Result has 327 places, 421 transitions, 7941 flow [2024-06-27 16:36:04,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=7374, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7941, PETRI_PLACES=327, PETRI_TRANSITIONS=421} [2024-06-27 16:36:04,171 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 302 predicate places. [2024-06-27 16:36:04,171 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 421 transitions, 7941 flow [2024-06-27 16:36:04,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:04,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:04,171 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:04,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-06-27 16:36:04,382 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,SelfDestructingSolverStorable28 [2024-06-27 16:36:04,383 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:04,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:04,383 INFO L85 PathProgramCache]: Analyzing trace with hash -793693554, now seen corresponding path program 17 times [2024-06-27 16:36:04,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:04,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103828654] [2024-06-27 16:36:04,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:04,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:04,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:04,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103828654] [2024-06-27 16:36:04,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103828654] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:04,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073972772] [2024-06-27 16:36:04,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:36:04,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:04,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:04,616 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 16:36:04,618 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 16:36:04,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 16:36:04,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:36:04,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 16:36:04,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:04,786 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 91 treesize of output 59 [2024-06-27 16:36:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:04,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:04,943 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:36:04,943 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 117 treesize of output 61 [2024-06-27 16:36:04,987 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:04,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073972772] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:04,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:04,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2024-06-27 16:36:04,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697409984] [2024-06-27 16:36:04,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:04,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:36:04,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:04,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:36:04,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:36:04,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:36:04,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 421 transitions, 7941 flow. Second operand has 18 states, 18 states have (on average 6.055555555555555) internal successors, (109), 18 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:04,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:04,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:36:04,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:06,185 INFO L124 PetriNetUnfolderBase]: 2952/5472 cut-off events. [2024-06-27 16:36:06,185 INFO L125 PetriNetUnfolderBase]: For 179213/179213 co-relation queries the response was YES. [2024-06-27 16:36:06,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44279 conditions, 5472 events. 2952/5472 cut-off events. For 179213/179213 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 37814 event pairs, 1799 based on Foata normal form. 16/5488 useless extension candidates. Maximal degree in co-relation 44180. Up to 4674 conditions per place. [2024-06-27 16:36:06,234 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 402 selfloop transitions, 56 changer transitions 3/462 dead transitions. [2024-06-27 16:36:06,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 462 transitions, 9412 flow [2024-06-27 16:36:06,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:36:06,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:36:06,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-27 16:36:06,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 16:36:06,236 INFO L175 Difference]: Start difference. First operand has 327 places, 421 transitions, 7941 flow. Second operand 10 states and 104 transitions. [2024-06-27 16:36:06,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 462 transitions, 9412 flow [2024-06-27 16:36:07,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 462 transitions, 9259 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 16:36:07,015 INFO L231 Difference]: Finished difference. Result has 327 places, 423 transitions, 7960 flow [2024-06-27 16:36:07,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7960, PETRI_PLACES=327, PETRI_TRANSITIONS=423} [2024-06-27 16:36:07,016 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 302 predicate places. [2024-06-27 16:36:07,016 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 423 transitions, 7960 flow [2024-06-27 16:36:07,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.055555555555555) internal successors, (109), 18 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:07,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:07,016 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:07,032 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 16:36:07,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:07,228 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:07,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:07,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1299294902, now seen corresponding path program 18 times [2024-06-27 16:36:07,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:07,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091339035] [2024-06-27 16:36:07,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:07,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:07,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:07,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091339035] [2024-06-27 16:36:07,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091339035] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:07,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106048120] [2024-06-27 16:36:07,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:36:07,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:07,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:07,516 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 16:36:07,518 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 16:36:07,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:36:07,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:36:07,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-27 16:36:07,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:07,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:07,908 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:36:07,912 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 54 treesize of output 30 [2024-06-27 16:36:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:07,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106048120] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:07,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:07,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2024-06-27 16:36:07,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754458317] [2024-06-27 16:36:07,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:07,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 16:36:07,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:07,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 16:36:07,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2024-06-27 16:36:07,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:36:07,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 423 transitions, 7960 flow. Second operand has 20 states, 20 states have (on average 5.65) internal successors, (113), 20 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:07,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:07,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:36:07,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:09,253 INFO L124 PetriNetUnfolderBase]: 2961/5481 cut-off events. [2024-06-27 16:36:09,253 INFO L125 PetriNetUnfolderBase]: For 179694/179694 co-relation queries the response was YES. [2024-06-27 16:36:09,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44267 conditions, 5481 events. 2961/5481 cut-off events. For 179694/179694 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 37884 event pairs, 1669 based on Foata normal form. 24/5505 useless extension candidates. Maximal degree in co-relation 44167. Up to 4365 conditions per place. [2024-06-27 16:36:09,303 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 344 selfloop transitions, 119 changer transitions 4/468 dead transitions. [2024-06-27 16:36:09,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 468 transitions, 9302 flow [2024-06-27 16:36:09,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 16:36:09,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 16:36:09,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 144 transitions. [2024-06-27 16:36:09,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3257918552036199 [2024-06-27 16:36:09,304 INFO L175 Difference]: Start difference. First operand has 327 places, 423 transitions, 7960 flow. Second operand 17 states and 144 transitions. [2024-06-27 16:36:09,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 468 transitions, 9302 flow [2024-06-27 16:36:10,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 468 transitions, 9181 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 16:36:10,124 INFO L231 Difference]: Finished difference. Result has 336 places, 429 transitions, 8223 flow [2024-06-27 16:36:10,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=7672, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8223, PETRI_PLACES=336, PETRI_TRANSITIONS=429} [2024-06-27 16:36:10,124 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 311 predicate places. [2024-06-27 16:36:10,124 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 429 transitions, 8223 flow [2024-06-27 16:36:10,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.65) internal successors, (113), 20 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:10,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:10,125 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:10,136 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 16:36:10,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:10,336 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:10,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:10,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1760615770, now seen corresponding path program 19 times [2024-06-27 16:36:10,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:10,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039541799] [2024-06-27 16:36:10,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:10,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:10,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:10,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039541799] [2024-06-27 16:36:10,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039541799] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:10,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225271080] [2024-06-27 16:36:10,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:36:10,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:10,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:10,562 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 16:36:10,564 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 16:36:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:10,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjunts are in the unsatisfiable core [2024-06-27 16:36:10,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:10,776 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 112 treesize of output 72 [2024-06-27 16:36:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:10,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:10,951 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:36:10,952 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 51 treesize of output 27 [2024-06-27 16:36:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:10,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225271080] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:10,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:10,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 20 [2024-06-27 16:36:10,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915021779] [2024-06-27 16:36:10,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:10,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 16:36:10,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:10,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 16:36:10,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2024-06-27 16:36:10,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:36:10,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 429 transitions, 8223 flow. Second operand has 20 states, 20 states have (on average 5.85) internal successors, (117), 20 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:10,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:10,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:36:10,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:12,360 INFO L124 PetriNetUnfolderBase]: 2921/5372 cut-off events. [2024-06-27 16:36:12,360 INFO L125 PetriNetUnfolderBase]: For 191801/191801 co-relation queries the response was YES. [2024-06-27 16:36:12,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44757 conditions, 5372 events. 2921/5372 cut-off events. For 191801/191801 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 36558 event pairs, 1223 based on Foata normal form. 8/5380 useless extension candidates. Maximal degree in co-relation 44654. Up to 2736 conditions per place. [2024-06-27 16:36:12,411 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 318 selfloop transitions, 137 changer transitions 27/483 dead transitions. [2024-06-27 16:36:12,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 483 transitions, 9931 flow [2024-06-27 16:36:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 16:36:12,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 16:36:12,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 165 transitions. [2024-06-27 16:36:12,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3733031674208145 [2024-06-27 16:36:12,413 INFO L175 Difference]: Start difference. First operand has 336 places, 429 transitions, 8223 flow. Second operand 17 states and 165 transitions. [2024-06-27 16:36:12,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 483 transitions, 9931 flow [2024-06-27 16:36:13,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 483 transitions, 9528 flow, removed 67 selfloop flow, removed 12 redundant places. [2024-06-27 16:36:13,227 INFO L231 Difference]: Finished difference. Result has 340 places, 413 transitions, 7834 flow [2024-06-27 16:36:13,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=7712, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7834, PETRI_PLACES=340, PETRI_TRANSITIONS=413} [2024-06-27 16:36:13,228 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 315 predicate places. [2024-06-27 16:36:13,228 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 413 transitions, 7834 flow [2024-06-27 16:36:13,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.85) internal successors, (117), 20 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:13,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:13,228 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:13,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-06-27 16:36:13,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:13,440 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:13,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:13,440 INFO L85 PathProgramCache]: Analyzing trace with hash 650067310, now seen corresponding path program 20 times [2024-06-27 16:36:13,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:13,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902749867] [2024-06-27 16:36:13,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:13,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:13,697 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:13,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:13,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902749867] [2024-06-27 16:36:13,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902749867] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:13,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551929896] [2024-06-27 16:36:13,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:36:13,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:13,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:13,699 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:13,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-06-27 16:36:13,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:36:13,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:36:13,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjunts are in the unsatisfiable core [2024-06-27 16:36:13,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:13,933 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 61 treesize of output 37 [2024-06-27 16:36:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:13,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:14,016 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:36:14,016 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 87 treesize of output 47 [2024-06-27 16:36:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:14,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551929896] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:14,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:14,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 18 [2024-06-27 16:36:14,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748736830] [2024-06-27 16:36:14,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:14,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:36:14,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:14,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:36:14,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:36:14,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:36:14,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 413 transitions, 7834 flow. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:14,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:14,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:36:14,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:15,110 INFO L124 PetriNetUnfolderBase]: 2868/5244 cut-off events. [2024-06-27 16:36:15,111 INFO L125 PetriNetUnfolderBase]: For 186036/186036 co-relation queries the response was YES. [2024-06-27 16:36:15,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43357 conditions, 5244 events. 2868/5244 cut-off events. For 186036/186036 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 35463 event pairs, 1856 based on Foata normal form. 2/5246 useless extension candidates. Maximal degree in co-relation 43256. Up to 4783 conditions per place. [2024-06-27 16:36:15,159 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 373 selfloop transitions, 42 changer transitions 9/425 dead transitions. [2024-06-27 16:36:15,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 425 transitions, 8787 flow [2024-06-27 16:36:15,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:36:15,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:36:15,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 77 transitions. [2024-06-27 16:36:15,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32905982905982906 [2024-06-27 16:36:15,161 INFO L175 Difference]: Start difference. First operand has 340 places, 413 transitions, 7834 flow. Second operand 9 states and 77 transitions. [2024-06-27 16:36:15,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 425 transitions, 8787 flow [2024-06-27 16:36:15,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 425 transitions, 8471 flow, removed 51 selfloop flow, removed 19 redundant places. [2024-06-27 16:36:15,800 INFO L231 Difference]: Finished difference. Result has 320 places, 406 transitions, 7489 flow [2024-06-27 16:36:15,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=7446, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7489, PETRI_PLACES=320, PETRI_TRANSITIONS=406} [2024-06-27 16:36:15,801 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 295 predicate places. [2024-06-27 16:36:15,801 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 406 transitions, 7489 flow [2024-06-27 16:36:15,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:15,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:15,802 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:15,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-06-27 16:36:16,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:16,011 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:16,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:16,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1901499140, now seen corresponding path program 21 times [2024-06-27 16:36:16,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:16,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409209356] [2024-06-27 16:36:16,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:16,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:16,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:16,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409209356] [2024-06-27 16:36:16,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409209356] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:16,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553247661] [2024-06-27 16:36:16,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:36:16,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:16,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:16,301 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:16,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-06-27 16:36:16,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-27 16:36:16,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:36:16,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:36:16,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:16,614 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 91 treesize of output 59 [2024-06-27 16:36:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:16,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:16,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:36:16,850 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 54 treesize of output 30 [2024-06-27 16:36:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:16,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553247661] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:16,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:16,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-06-27 16:36:16,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999184650] [2024-06-27 16:36:16,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:16,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 16:36:16,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:16,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 16:36:16,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-06-27 16:36:16,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:36:16,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 406 transitions, 7489 flow. Second operand has 20 states, 20 states have (on average 5.85) internal successors, (117), 20 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:16,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:16,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:36:16,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:18,680 INFO L124 PetriNetUnfolderBase]: 3152/5784 cut-off events. [2024-06-27 16:36:18,681 INFO L125 PetriNetUnfolderBase]: For 171827/171827 co-relation queries the response was YES. [2024-06-27 16:36:18,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45031 conditions, 5784 events. 3152/5784 cut-off events. For 171827/171827 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 39966 event pairs, 1328 based on Foata normal form. 42/5826 useless extension candidates. Maximal degree in co-relation 44937. Up to 3409 conditions per place. [2024-06-27 16:36:18,733 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 391 selfloop transitions, 168 changer transitions 13/573 dead transitions. [2024-06-27 16:36:18,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 573 transitions, 10824 flow [2024-06-27 16:36:18,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-06-27 16:36:18,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-06-27 16:36:18,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 288 transitions. [2024-06-27 16:36:18,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3819628647214854 [2024-06-27 16:36:18,734 INFO L175 Difference]: Start difference. First operand has 320 places, 406 transitions, 7489 flow. Second operand 29 states and 288 transitions. [2024-06-27 16:36:18,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 573 transitions, 10824 flow [2024-06-27 16:36:19,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 573 transitions, 10720 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 16:36:19,530 INFO L231 Difference]: Finished difference. Result has 350 places, 441 transitions, 8629 flow [2024-06-27 16:36:19,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=7387, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8629, PETRI_PLACES=350, PETRI_TRANSITIONS=441} [2024-06-27 16:36:19,531 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 325 predicate places. [2024-06-27 16:36:19,531 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 441 transitions, 8629 flow [2024-06-27 16:36:19,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.85) internal successors, (117), 20 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:19,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:19,531 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:19,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-06-27 16:36:19,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-06-27 16:36:19,742 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:19,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:19,743 INFO L85 PathProgramCache]: Analyzing trace with hash 69910266, now seen corresponding path program 22 times [2024-06-27 16:36:19,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:19,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127631036] [2024-06-27 16:36:19,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:19,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:20,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:20,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127631036] [2024-06-27 16:36:20,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127631036] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:20,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677055480] [2024-06-27 16:36:20,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:36:20,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:20,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:20,017 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:20,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-06-27 16:36:20,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:36:20,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:36:20,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:36:20,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:20,310 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 91 treesize of output 59 [2024-06-27 16:36:20,392 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:20,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:20,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:36:20,587 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 44 treesize of output 28 [2024-06-27 16:36:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:20,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677055480] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:20,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:20,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2024-06-27 16:36:20,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770267253] [2024-06-27 16:36:20,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:20,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 16:36:20,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:20,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 16:36:20,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2024-06-27 16:36:20,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:36:20,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 441 transitions, 8629 flow. Second operand has 20 states, 20 states have (on average 5.8) internal successors, (116), 20 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:20,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:20,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:36:20,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:23,004 INFO L124 PetriNetUnfolderBase]: 3346/6136 cut-off events. [2024-06-27 16:36:23,004 INFO L125 PetriNetUnfolderBase]: For 191304/191304 co-relation queries the response was YES. [2024-06-27 16:36:23,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49423 conditions, 6136 events. 3346/6136 cut-off events. For 191304/191304 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 42661 event pairs, 518 based on Foata normal form. 19/6155 useless extension candidates. Maximal degree in co-relation 49316. Up to 1775 conditions per place. [2024-06-27 16:36:23,057 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 374 selfloop transitions, 273 changer transitions 12/660 dead transitions. [2024-06-27 16:36:23,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 660 transitions, 12901 flow [2024-06-27 16:36:23,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-06-27 16:36:23,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-06-27 16:36:23,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 374 transitions. [2024-06-27 16:36:23,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.368836291913215 [2024-06-27 16:36:23,059 INFO L175 Difference]: Start difference. First operand has 350 places, 441 transitions, 8629 flow. Second operand 39 states and 374 transitions. [2024-06-27 16:36:23,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 660 transitions, 12901 flow [2024-06-27 16:36:23,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 660 transitions, 12679 flow, removed 70 selfloop flow, removed 11 redundant places. [2024-06-27 16:36:23,903 INFO L231 Difference]: Finished difference. Result has 386 places, 473 transitions, 9824 flow [2024-06-27 16:36:23,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=8416, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=9824, PETRI_PLACES=386, PETRI_TRANSITIONS=473} [2024-06-27 16:36:23,904 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 361 predicate places. [2024-06-27 16:36:23,904 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 473 transitions, 9824 flow [2024-06-27 16:36:23,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.8) internal successors, (116), 20 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:23,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:23,904 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:23,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-06-27 16:36:24,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-06-27 16:36:24,106 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:24,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:24,108 INFO L85 PathProgramCache]: Analyzing trace with hash -56912050, now seen corresponding path program 23 times [2024-06-27 16:36:24,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:24,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801168653] [2024-06-27 16:36:24,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:24,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:24,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:24,408 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:24,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:24,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801168653] [2024-06-27 16:36:24,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801168653] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:24,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881007637] [2024-06-27 16:36:24,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:36:24,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:24,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:24,412 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:24,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-06-27 16:36:24,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 16:36:24,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:36:24,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 16:36:24,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:24,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:24,835 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:36:24,835 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 51 treesize of output 27 [2024-06-27 16:36:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:24,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881007637] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:24,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:24,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2024-06-27 16:36:24,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023661439] [2024-06-27 16:36:24,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:24,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 16:36:24,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:24,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 16:36:24,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2024-06-27 16:36:24,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:36:24,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 473 transitions, 9824 flow. Second operand has 21 states, 21 states have (on average 5.666666666666667) internal successors, (119), 21 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:24,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:24,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:36:24,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:26,427 INFO L124 PetriNetUnfolderBase]: 3420/6252 cut-off events. [2024-06-27 16:36:26,427 INFO L125 PetriNetUnfolderBase]: For 209617/209617 co-relation queries the response was YES. [2024-06-27 16:36:26,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51623 conditions, 6252 events. 3420/6252 cut-off events. For 209617/209617 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 43854 event pairs, 2087 based on Foata normal form. 24/6276 useless extension candidates. Maximal degree in co-relation 51508. Up to 5315 conditions per place. [2024-06-27 16:36:26,491 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 450 selfloop transitions, 58 changer transitions 6/515 dead transitions. [2024-06-27 16:36:26,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 515 transitions, 11514 flow [2024-06-27 16:36:26,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:36:26,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:36:26,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 98 transitions. [2024-06-27 16:36:26,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3769230769230769 [2024-06-27 16:36:26,492 INFO L175 Difference]: Start difference. First operand has 386 places, 473 transitions, 9824 flow. Second operand 10 states and 98 transitions. [2024-06-27 16:36:26,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 515 transitions, 11514 flow [2024-06-27 16:36:27,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 515 transitions, 11205 flow, removed 56 selfloop flow, removed 17 redundant places. [2024-06-27 16:36:27,439 INFO L231 Difference]: Finished difference. Result has 379 places, 476 transitions, 9729 flow [2024-06-27 16:36:27,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=9491, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9729, PETRI_PLACES=379, PETRI_TRANSITIONS=476} [2024-06-27 16:36:27,440 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 354 predicate places. [2024-06-27 16:36:27,440 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 476 transitions, 9729 flow [2024-06-27 16:36:27,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.666666666666667) internal successors, (119), 21 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:27,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:27,440 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:27,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-06-27 16:36:27,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-06-27 16:36:27,651 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:27,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:27,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1049678760, now seen corresponding path program 24 times [2024-06-27 16:36:27,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:27,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465321163] [2024-06-27 16:36:27,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:27,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:27,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:27,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465321163] [2024-06-27 16:36:27,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465321163] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:27,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462140206] [2024-06-27 16:36:27,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:36:27,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:27,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:27,875 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:27,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-06-27 16:36:27,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:36:27,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:36:27,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-27 16:36:27,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:28,338 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 82 treesize of output 50 [2024-06-27 16:36:28,348 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:28,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:28,475 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:36:28,475 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 125 treesize of output 69 [2024-06-27 16:36:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:28,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462140206] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:28,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:28,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2024-06-27 16:36:28,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971342076] [2024-06-27 16:36:28,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:28,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 16:36:28,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:28,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 16:36:28,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2024-06-27 16:36:28,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:36:28,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 476 transitions, 9729 flow. Second operand has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 21 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:28,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:28,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:36:28,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:30,254 INFO L124 PetriNetUnfolderBase]: 3408/6216 cut-off events. [2024-06-27 16:36:30,254 INFO L125 PetriNetUnfolderBase]: For 203841/203841 co-relation queries the response was YES. [2024-06-27 16:36:30,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51117 conditions, 6216 events. 3408/6216 cut-off events. For 203841/203841 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 43317 event pairs, 1483 based on Foata normal form. 4/6220 useless extension candidates. Maximal degree in co-relation 51002. Up to 3601 conditions per place. [2024-06-27 16:36:30,317 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 348 selfloop transitions, 166 changer transitions 17/532 dead transitions. [2024-06-27 16:36:30,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 532 transitions, 11495 flow [2024-06-27 16:36:30,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 16:36:30,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 16:36:30,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 145 transitions. [2024-06-27 16:36:30,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3485576923076923 [2024-06-27 16:36:30,318 INFO L175 Difference]: Start difference. First operand has 379 places, 476 transitions, 9729 flow. Second operand 16 states and 145 transitions. [2024-06-27 16:36:30,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 532 transitions, 11495 flow [2024-06-27 16:36:31,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 532 transitions, 11352 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-27 16:36:31,496 INFO L231 Difference]: Finished difference. Result has 384 places, 471 transitions, 9858 flow [2024-06-27 16:36:31,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=9559, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9858, PETRI_PLACES=384, PETRI_TRANSITIONS=471} [2024-06-27 16:36:31,497 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 359 predicate places. [2024-06-27 16:36:31,497 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 471 transitions, 9858 flow [2024-06-27 16:36:31,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 21 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:31,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:31,498 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:31,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-06-27 16:36:31,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:31,699 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:31,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:31,699 INFO L85 PathProgramCache]: Analyzing trace with hash 910123012, now seen corresponding path program 25 times [2024-06-27 16:36:31,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:31,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670835604] [2024-06-27 16:36:31,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:31,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:31,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:31,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670835604] [2024-06-27 16:36:31,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670835604] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:31,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857951972] [2024-06-27 16:36:31,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:36:31,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:31,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:31,976 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:31,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-06-27 16:36:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:32,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 16:36:32,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:32,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:32,300 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:36:32,300 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 51 treesize of output 27 [2024-06-27 16:36:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:32,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857951972] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:32,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:32,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-06-27 16:36:32,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888698681] [2024-06-27 16:36:32,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:32,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:36:32,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:32,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:36:32,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:36:32,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:36:32,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 471 transitions, 9858 flow. Second operand has 19 states, 19 states have (on average 5.842105263157895) internal successors, (111), 19 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:32,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:32,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:36:32,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:33,885 INFO L124 PetriNetUnfolderBase]: 3381/6136 cut-off events. [2024-06-27 16:36:33,885 INFO L125 PetriNetUnfolderBase]: For 208149/208149 co-relation queries the response was YES. [2024-06-27 16:36:33,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50881 conditions, 6136 events. 3381/6136 cut-off events. For 208149/208149 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 42549 event pairs, 2056 based on Foata normal form. 20/6156 useless extension candidates. Maximal degree in co-relation 50767. Up to 5091 conditions per place. [2024-06-27 16:36:33,940 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 427 selfloop transitions, 62 changer transitions 3/493 dead transitions. [2024-06-27 16:36:33,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 493 transitions, 11113 flow [2024-06-27 16:36:33,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:36:33,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:36:33,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 84 transitions. [2024-06-27 16:36:33,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358974358974359 [2024-06-27 16:36:33,942 INFO L175 Difference]: Start difference. First operand has 384 places, 471 transitions, 9858 flow. Second operand 9 states and 84 transitions. [2024-06-27 16:36:33,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 493 transitions, 11113 flow [2024-06-27 16:36:34,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 493 transitions, 10734 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-06-27 16:36:34,827 INFO L231 Difference]: Finished difference. Result has 374 places, 466 transitions, 9485 flow [2024-06-27 16:36:34,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=9307, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9485, PETRI_PLACES=374, PETRI_TRANSITIONS=466} [2024-06-27 16:36:34,827 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 349 predicate places. [2024-06-27 16:36:34,827 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 466 transitions, 9485 flow [2024-06-27 16:36:34,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.842105263157895) internal successors, (111), 19 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:34,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:34,828 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:34,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-06-27 16:36:35,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-06-27 16:36:35,040 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:35,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:35,040 INFO L85 PathProgramCache]: Analyzing trace with hash 325569394, now seen corresponding path program 26 times [2024-06-27 16:36:35,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:35,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604610590] [2024-06-27 16:36:35,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:35,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:35,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:35,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:35,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604610590] [2024-06-27 16:36:35,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604610590] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:35,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975228553] [2024-06-27 16:36:35,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:36:35,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:35,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:35,334 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:35,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-06-27 16:36:35,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:36:35,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:36:35,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-27 16:36:35,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:35,802 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 82 treesize of output 50 [2024-06-27 16:36:35,812 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:35,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:35,942 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:36:35,942 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 117 treesize of output 69 [2024-06-27 16:36:35,976 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:35,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975228553] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:35,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:35,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2024-06-27 16:36:35,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907759054] [2024-06-27 16:36:35,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:35,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 16:36:35,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:35,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 16:36:35,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-06-27 16:36:35,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:36:35,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 466 transitions, 9485 flow. Second operand has 20 states, 20 states have (on average 5.5) internal successors, (110), 20 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:35,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:35,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:36:35,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:38,001 INFO L124 PetriNetUnfolderBase]: 3436/6237 cut-off events. [2024-06-27 16:36:38,002 INFO L125 PetriNetUnfolderBase]: For 203269/203269 co-relation queries the response was YES. [2024-06-27 16:36:38,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51257 conditions, 6237 events. 3436/6237 cut-off events. For 203269/203269 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 43103 event pairs, 1125 based on Foata normal form. 6/6243 useless extension candidates. Maximal degree in co-relation 51145. Up to 2275 conditions per place. [2024-06-27 16:36:38,063 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 317 selfloop transitions, 217 changer transitions 10/545 dead transitions. [2024-06-27 16:36:38,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 545 transitions, 11855 flow [2024-06-27 16:36:38,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 16:36:38,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 16:36:38,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 149 transitions. [2024-06-27 16:36:38,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.382051282051282 [2024-06-27 16:36:38,064 INFO L175 Difference]: Start difference. First operand has 374 places, 466 transitions, 9485 flow. Second operand 15 states and 149 transitions. [2024-06-27 16:36:38,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 545 transitions, 11855 flow [2024-06-27 16:36:39,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 545 transitions, 11737 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 16:36:39,082 INFO L231 Difference]: Finished difference. Result has 387 places, 479 transitions, 10445 flow [2024-06-27 16:36:39,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=9355, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10445, PETRI_PLACES=387, PETRI_TRANSITIONS=479} [2024-06-27 16:36:39,083 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 362 predicate places. [2024-06-27 16:36:39,083 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 479 transitions, 10445 flow [2024-06-27 16:36:39,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.5) internal successors, (110), 20 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:39,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:39,084 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:39,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-06-27 16:36:39,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-06-27 16:36:39,295 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:39,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:39,295 INFO L85 PathProgramCache]: Analyzing trace with hash -728994396, now seen corresponding path program 27 times [2024-06-27 16:36:39,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:39,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927812635] [2024-06-27 16:36:39,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:39,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:39,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:39,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927812635] [2024-06-27 16:36:39,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927812635] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:39,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896845459] [2024-06-27 16:36:39,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:36:39,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:39,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:39,577 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:39,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-06-27 16:36:39,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:36:39,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:36:39,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:36:39,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:39,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:40,009 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 16:36:40,010 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 40 treesize of output 19 [2024-06-27 16:36:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:40,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896845459] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:40,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:40,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2024-06-27 16:36:40,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404883747] [2024-06-27 16:36:40,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:40,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 16:36:40,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:40,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 16:36:40,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-06-27 16:36:40,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:36:40,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 479 transitions, 10445 flow. Second operand has 21 states, 21 states have (on average 5.619047619047619) internal successors, (118), 21 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:40,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:40,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:36:40,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:41,976 INFO L124 PetriNetUnfolderBase]: 3717/6706 cut-off events. [2024-06-27 16:36:41,976 INFO L125 PetriNetUnfolderBase]: For 250467/250467 co-relation queries the response was YES. [2024-06-27 16:36:42,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57882 conditions, 6706 events. 3717/6706 cut-off events. For 250467/250467 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 46742 event pairs, 743 based on Foata normal form. 30/6736 useless extension candidates. Maximal degree in co-relation 57764. Up to 2906 conditions per place. [2024-06-27 16:36:42,044 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 399 selfloop transitions, 194 changer transitions 4/598 dead transitions. [2024-06-27 16:36:42,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 598 transitions, 13756 flow [2024-06-27 16:36:42,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 16:36:42,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 16:36:42,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 173 transitions. [2024-06-27 16:36:42,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3696581196581197 [2024-06-27 16:36:42,045 INFO L175 Difference]: Start difference. First operand has 387 places, 479 transitions, 10445 flow. Second operand 18 states and 173 transitions. [2024-06-27 16:36:42,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 598 transitions, 13756 flow [2024-06-27 16:36:43,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 598 transitions, 13557 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-27 16:36:43,378 INFO L231 Difference]: Finished difference. Result has 403 places, 519 transitions, 11766 flow [2024-06-27 16:36:43,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=10248, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=11766, PETRI_PLACES=403, PETRI_TRANSITIONS=519} [2024-06-27 16:36:43,379 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 378 predicate places. [2024-06-27 16:36:43,379 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 519 transitions, 11766 flow [2024-06-27 16:36:43,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.619047619047619) internal successors, (118), 21 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:43,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:43,380 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:43,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-06-27 16:36:43,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-06-27 16:36:43,582 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:43,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:43,583 INFO L85 PathProgramCache]: Analyzing trace with hash -614732702, now seen corresponding path program 28 times [2024-06-27 16:36:43,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:43,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335442042] [2024-06-27 16:36:43,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:43,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:43,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:43,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335442042] [2024-06-27 16:36:43,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335442042] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:43,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001444229] [2024-06-27 16:36:43,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:36:43,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:43,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:43,817 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:43,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-06-27 16:36:43,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:36:43,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:36:43,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-27 16:36:43,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:44,082 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 112 treesize of output 72 [2024-06-27 16:36:44,153 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:44,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:44,317 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:36:44,317 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 51 treesize of output 27 [2024-06-27 16:36:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:44,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001444229] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:44,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:44,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-06-27 16:36:44,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589668459] [2024-06-27 16:36:44,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:44,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:36:44,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:44,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:36:44,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:36:44,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:36:44,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 519 transitions, 11766 flow. Second operand has 19 states, 19 states have (on average 6.0) internal successors, (114), 19 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:44,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:44,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:36:44,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:46,687 INFO L124 PetriNetUnfolderBase]: 3771/6805 cut-off events. [2024-06-27 16:36:46,687 INFO L125 PetriNetUnfolderBase]: For 320135/320135 co-relation queries the response was YES. [2024-06-27 16:36:46,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63354 conditions, 6805 events. 3771/6805 cut-off events. For 320135/320135 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 47743 event pairs, 1304 based on Foata normal form. 39/6844 useless extension candidates. Maximal degree in co-relation 63230. Up to 3367 conditions per place. [2024-06-27 16:36:46,761 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 356 selfloop transitions, 295 changer transitions 17/669 dead transitions. [2024-06-27 16:36:46,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 669 transitions, 15236 flow [2024-06-27 16:36:46,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-06-27 16:36:46,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-06-27 16:36:46,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 296 transitions. [2024-06-27 16:36:46,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37948717948717947 [2024-06-27 16:36:46,762 INFO L175 Difference]: Start difference. First operand has 403 places, 519 transitions, 11766 flow. Second operand 30 states and 296 transitions. [2024-06-27 16:36:46,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 669 transitions, 15236 flow [2024-06-27 16:36:48,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 669 transitions, 14667 flow, removed 126 selfloop flow, removed 10 redundant places. [2024-06-27 16:36:48,225 INFO L231 Difference]: Finished difference. Result has 427 places, 525 transitions, 12003 flow [2024-06-27 16:36:48,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=10928, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=12003, PETRI_PLACES=427, PETRI_TRANSITIONS=525} [2024-06-27 16:36:48,226 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 402 predicate places. [2024-06-27 16:36:48,226 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 525 transitions, 12003 flow [2024-06-27 16:36:48,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.0) internal successors, (114), 19 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:48,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:48,226 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:48,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-06-27 16:36:48,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:48,437 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:48,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:48,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1314451474, now seen corresponding path program 29 times [2024-06-27 16:36:48,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:48,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137500908] [2024-06-27 16:36:48,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:48,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:48,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:48,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:48,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137500908] [2024-06-27 16:36:48,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137500908] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:48,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189158492] [2024-06-27 16:36:48,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:36:48,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:48,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:48,725 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:48,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-06-27 16:36:48,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 16:36:48,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:36:48,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:36:48,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:48,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:49,066 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 16:36:49,067 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 40 treesize of output 19 [2024-06-27 16:36:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:49,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189158492] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:49,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:49,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-06-27 16:36:49,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287996016] [2024-06-27 16:36:49,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:49,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:36:49,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:49,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:36:49,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:36:49,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:36:49,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 525 transitions, 12003 flow. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:49,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:49,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:36:49,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:50,855 INFO L124 PetriNetUnfolderBase]: 3853/6900 cut-off events. [2024-06-27 16:36:50,855 INFO L125 PetriNetUnfolderBase]: For 315812/315812 co-relation queries the response was YES. [2024-06-27 16:36:50,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64535 conditions, 6900 events. 3853/6900 cut-off events. For 315812/315812 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 48145 event pairs, 757 based on Foata normal form. 20/6920 useless extension candidates. Maximal degree in co-relation 64411. Up to 2935 conditions per place. [2024-06-27 16:36:50,932 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 399 selfloop transitions, 191 changer transitions 3/594 dead transitions. [2024-06-27 16:36:50,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 594 transitions, 14261 flow [2024-06-27 16:36:50,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 16:36:50,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 16:36:50,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 110 transitions. [2024-06-27 16:36:50,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-06-27 16:36:50,933 INFO L175 Difference]: Start difference. First operand has 427 places, 525 transitions, 12003 flow. Second operand 11 states and 110 transitions. [2024-06-27 16:36:50,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 594 transitions, 14261 flow [2024-06-27 16:36:52,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 594 transitions, 13650 flow, removed 72 selfloop flow, removed 14 redundant places. [2024-06-27 16:36:52,474 INFO L231 Difference]: Finished difference. Result has 420 places, 524 transitions, 11806 flow [2024-06-27 16:36:52,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=11075, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11806, PETRI_PLACES=420, PETRI_TRANSITIONS=524} [2024-06-27 16:36:52,475 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 395 predicate places. [2024-06-27 16:36:52,475 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 524 transitions, 11806 flow [2024-06-27 16:36:52,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:52,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:52,475 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:52,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-06-27 16:36:52,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-06-27 16:36:52,687 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:52,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:52,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1230599204, now seen corresponding path program 30 times [2024-06-27 16:36:52,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:52,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372791786] [2024-06-27 16:36:52,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:52,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:52,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:52,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:52,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372791786] [2024-06-27 16:36:52,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372791786] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:52,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914657145] [2024-06-27 16:36:52,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:36:52,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:52,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:52,963 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:52,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-06-27 16:36:53,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:36:53,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:36:53,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:36:53,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:53,262 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 82 treesize of output 50 [2024-06-27 16:36:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:53,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:53,378 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:36:53,379 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 87 treesize of output 47 [2024-06-27 16:36:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:53,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914657145] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:53,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:53,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-06-27 16:36:53,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430791827] [2024-06-27 16:36:53,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:53,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 16:36:53,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:53,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 16:36:53,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2024-06-27 16:36:53,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:36:53,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 524 transitions, 11806 flow. Second operand has 20 states, 20 states have (on average 5.75) internal successors, (115), 20 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:53,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:53,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:36:53,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:55,089 INFO L124 PetriNetUnfolderBase]: 3842/6874 cut-off events. [2024-06-27 16:36:55,089 INFO L125 PetriNetUnfolderBase]: For 309462/309462 co-relation queries the response was YES. [2024-06-27 16:36:55,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63820 conditions, 6874 events. 3842/6874 cut-off events. For 309462/309462 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 48122 event pairs, 2439 based on Foata normal form. 3/6877 useless extension candidates. Maximal degree in co-relation 63701. Up to 6076 conditions per place. [2024-06-27 16:36:55,164 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 482 selfloop transitions, 53 changer transitions 13/549 dead transitions. [2024-06-27 16:36:55,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 549 transitions, 13343 flow [2024-06-27 16:36:55,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:36:55,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:36:55,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 89 transitions. [2024-06-27 16:36:55,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3423076923076923 [2024-06-27 16:36:55,165 INFO L175 Difference]: Start difference. First operand has 420 places, 524 transitions, 11806 flow. Second operand 10 states and 89 transitions. [2024-06-27 16:36:55,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 549 transitions, 13343 flow [2024-06-27 16:36:56,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 549 transitions, 13010 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 16:36:56,353 INFO L231 Difference]: Finished difference. Result has 420 places, 519 transitions, 11474 flow [2024-06-27 16:36:56,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=11415, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11474, PETRI_PLACES=420, PETRI_TRANSITIONS=519} [2024-06-27 16:36:56,354 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 395 predicate places. [2024-06-27 16:36:56,354 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 519 transitions, 11474 flow [2024-06-27 16:36:56,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.75) internal successors, (115), 20 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:56,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:56,354 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:56,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-06-27 16:36:56,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:56,565 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:56,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:56,566 INFO L85 PathProgramCache]: Analyzing trace with hash -2138892298, now seen corresponding path program 31 times [2024-06-27 16:36:56,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:56,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764710669] [2024-06-27 16:36:56,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:56,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:56,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:56,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764710669] [2024-06-27 16:36:56,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764710669] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:56,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343338878] [2024-06-27 16:36:56,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:36:56,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:56,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:56,809 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:56,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-06-27 16:36:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:56,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 16:36:56,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:57,037 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 61 treesize of output 37 [2024-06-27 16:36:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:57,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:57,117 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 16:36:57,118 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 109 treesize of output 56 [2024-06-27 16:36:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:36:57,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343338878] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:57,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:57,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2024-06-27 16:36:57,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081124565] [2024-06-27 16:36:57,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:57,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 16:36:57,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:57,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 16:36:57,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:36:57,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:36:57,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 519 transitions, 11474 flow. Second operand has 17 states, 17 states have (on average 6.0) internal successors, (102), 17 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:57,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:57,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:36:57,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:58,759 INFO L124 PetriNetUnfolderBase]: 3817/6807 cut-off events. [2024-06-27 16:36:58,759 INFO L125 PetriNetUnfolderBase]: For 300736/300736 co-relation queries the response was YES. [2024-06-27 16:36:58,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62591 conditions, 6807 events. 3817/6807 cut-off events. For 300736/300736 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 47089 event pairs, 1831 based on Foata normal form. 2/6809 useless extension candidates. Maximal degree in co-relation 62474. Up to 3796 conditions per place. [2024-06-27 16:36:58,832 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 400 selfloop transitions, 137 changer transitions 9/547 dead transitions. [2024-06-27 16:36:58,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 547 transitions, 12863 flow [2024-06-27 16:36:58,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:36:58,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:36:58,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 84 transitions. [2024-06-27 16:36:58,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358974358974359 [2024-06-27 16:36:58,833 INFO L175 Difference]: Start difference. First operand has 420 places, 519 transitions, 11474 flow. Second operand 9 states and 84 transitions. [2024-06-27 16:36:58,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 547 transitions, 12863 flow [2024-06-27 16:36:59,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 547 transitions, 12743 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 16:36:59,984 INFO L231 Difference]: Finished difference. Result has 417 places, 513 transitions, 11459 flow [2024-06-27 16:36:59,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=11277, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11459, PETRI_PLACES=417, PETRI_TRANSITIONS=513} [2024-06-27 16:36:59,985 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 392 predicate places. [2024-06-27 16:36:59,985 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 513 transitions, 11459 flow [2024-06-27 16:36:59,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0) internal successors, (102), 17 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:59,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:59,986 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] [2024-06-27 16:36:59,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-06-27 16:37:00,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-06-27 16:37:00,199 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:37:00,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:37:00,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1214510465, now seen corresponding path program 32 times [2024-06-27 16:37:00,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:37:00,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967948895] [2024-06-27 16:37:00,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:37:00,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:37:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:37:00,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:37:00,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:37:00,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967948895] [2024-06-27 16:37:00,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967948895] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:37:00,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205093299] [2024-06-27 16:37:00,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:37:00,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:37:00,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:37:00,955 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:37:00,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-06-27 16:37:01,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:37:01,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:37:01,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 53 conjunts are in the unsatisfiable core [2024-06-27 16:37:01,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:37:01,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:37:01,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-06-27 16:37:01,468 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 158 treesize of output 102 [2024-06-27 16:37:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:37:01,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:37:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:37:03,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205093299] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:37:03,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:37:03,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 12] total 39 [2024-06-27 16:37:03,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273344459] [2024-06-27 16:37:03,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:37:03,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-06-27 16:37:03,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:37:03,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-06-27 16:37:03,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2024-06-27 16:37:03,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:37:03,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 513 transitions, 11459 flow. Second operand has 39 states, 39 states have (on average 5.0) internal successors, (195), 39 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:37:03,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:37:03,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:37:03,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:37:08,683 INFO L124 PetriNetUnfolderBase]: 5127/9226 cut-off events. [2024-06-27 16:37:08,684 INFO L125 PetriNetUnfolderBase]: For 426245/426245 co-relation queries the response was YES. [2024-06-27 16:37:08,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86200 conditions, 9226 events. 5127/9226 cut-off events. For 426245/426245 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 67174 event pairs, 971 based on Foata normal form. 9/9235 useless extension candidates. Maximal degree in co-relation 86083. Up to 2071 conditions per place. [2024-06-27 16:37:08,770 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 546 selfloop transitions, 279 changer transitions 23/849 dead transitions. [2024-06-27 16:37:08,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 849 transitions, 19279 flow [2024-06-27 16:37:08,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-06-27 16:37:08,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-06-27 16:37:08,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 310 transitions. [2024-06-27 16:37:08,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114058355437666 [2024-06-27 16:37:08,771 INFO L175 Difference]: Start difference. First operand has 417 places, 513 transitions, 11459 flow. Second operand 29 states and 310 transitions. [2024-06-27 16:37:08,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 849 transitions, 19279 flow [2024-06-27 16:37:10,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 849 transitions, 18875 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 16:37:10,527 INFO L231 Difference]: Finished difference. Result has 447 places, 602 transitions, 14155 flow [2024-06-27 16:37:10,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=11183, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=14155, PETRI_PLACES=447, PETRI_TRANSITIONS=602} [2024-06-27 16:37:10,527 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 422 predicate places. [2024-06-27 16:37:10,528 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 602 transitions, 14155 flow [2024-06-27 16:37:10,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.0) internal successors, (195), 39 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:37:10,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:37:10,528 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] [2024-06-27 16:37:10,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-06-27 16:37:10,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:37:10,739 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:37:10,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:37:10,740 INFO L85 PathProgramCache]: Analyzing trace with hash -253422639, now seen corresponding path program 33 times [2024-06-27 16:37:10,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:37:10,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804195216] [2024-06-27 16:37:10,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:37:10,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:37:10,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:37:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:37:11,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:37:11,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804195216] [2024-06-27 16:37:11,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804195216] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:37:11,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748940140] [2024-06-27 16:37:11,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:37:11,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:37:11,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:37:11,252 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:37:11,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-06-27 16:37:11,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-27 16:37:11,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:37:11,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 42 conjunts are in the unsatisfiable core [2024-06-27 16:37:11,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:37:11,733 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 158 treesize of output 102 [2024-06-27 16:37:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:37:11,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:37:12,959 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:37:12,959 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 234 treesize of output 154 [2024-06-27 16:37:13,276 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:37:13,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748940140] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:37:13,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:37:13,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 32 [2024-06-27 16:37:13,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641890095] [2024-06-27 16:37:13,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:37:13,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:37:13,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:37:13,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:37:13,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2024-06-27 16:37:13,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:37:13,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 602 transitions, 14155 flow. Second operand has 32 states, 32 states have (on average 5.28125) internal successors, (169), 32 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:37:13,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:37:13,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:37:13,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:37:18,519 INFO L124 PetriNetUnfolderBase]: 5983/10853 cut-off events. [2024-06-27 16:37:18,519 INFO L125 PetriNetUnfolderBase]: For 565649/565649 co-relation queries the response was YES. [2024-06-27 16:37:18,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105516 conditions, 10853 events. 5983/10853 cut-off events. For 565649/565649 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 81225 event pairs, 1176 based on Foata normal form. 10/10863 useless extension candidates. Maximal degree in co-relation 105387. Up to 3938 conditions per place. [2024-06-27 16:37:18,640 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 620 selfloop transitions, 343 changer transitions 27/991 dead transitions. [2024-06-27 16:37:18,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 991 transitions, 23580 flow [2024-06-27 16:37:18,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-06-27 16:37:18,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-06-27 16:37:18,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 386 transitions. [2024-06-27 16:37:18,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41239316239316237 [2024-06-27 16:37:18,642 INFO L175 Difference]: Start difference. First operand has 447 places, 602 transitions, 14155 flow. Second operand 36 states and 386 transitions. [2024-06-27 16:37:18,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 991 transitions, 23580 flow [2024-06-27 16:37:21,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 991 transitions, 23076 flow, removed 142 selfloop flow, removed 12 redundant places. [2024-06-27 16:37:21,754 INFO L231 Difference]: Finished difference. Result has 485 places, 698 transitions, 16767 flow [2024-06-27 16:37:21,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=13694, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=16767, PETRI_PLACES=485, PETRI_TRANSITIONS=698} [2024-06-27 16:37:21,755 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 460 predicate places. [2024-06-27 16:37:21,755 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 698 transitions, 16767 flow [2024-06-27 16:37:21,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.28125) internal successors, (169), 32 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:37:21,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:37:21,755 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] [2024-06-27 16:37:21,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-06-27 16:37:21,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-06-27 16:37:21,961 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:37:21,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:37:21,962 INFO L85 PathProgramCache]: Analyzing trace with hash -414506743, now seen corresponding path program 34 times [2024-06-27 16:37:21,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:37:21,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615570279] [2024-06-27 16:37:21,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:37:21,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:37:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:37:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:37:22,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:37:22,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615570279] [2024-06-27 16:37:22,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615570279] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:37:22,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446721933] [2024-06-27 16:37:22,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:37:22,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:37:22,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:37:22,582 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:37:22,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-06-27 16:37:22,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:37:22,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:37:22,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2024-06-27 16:37:22,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:37:22,958 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 158 treesize of output 102 [2024-06-27 16:37:23,088 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:37:23,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:37:24,074 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:37:24,074 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 193 treesize of output 137 [2024-06-27 16:37:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:37:24,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446721933] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:37:24,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:37:24,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 31 [2024-06-27 16:37:24,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730389128] [2024-06-27 16:37:24,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:37:24,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:37:24,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:37:24,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:37:24,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:37:24,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:37:24,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 698 transitions, 16767 flow. Second operand has 31 states, 31 states have (on average 5.387096774193548) internal successors, (167), 31 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:37:24,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:37:24,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:37:24,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:37:29,826 INFO L124 PetriNetUnfolderBase]: 6418/11656 cut-off events. [2024-06-27 16:37:29,826 INFO L125 PetriNetUnfolderBase]: For 703869/703869 co-relation queries the response was YES. [2024-06-27 16:37:29,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119061 conditions, 11656 events. 6418/11656 cut-off events. For 703869/703869 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 88289 event pairs, 1371 based on Foata normal form. 8/11664 useless extension candidates. Maximal degree in co-relation 118919. Up to 4806 conditions per place. [2024-06-27 16:37:30,024 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 613 selfloop transitions, 334 changer transitions 22/970 dead transitions. [2024-06-27 16:37:30,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 970 transitions, 24578 flow [2024-06-27 16:37:30,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-06-27 16:37:30,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-06-27 16:37:30,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 299 transitions. [2024-06-27 16:37:30,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39655172413793105 [2024-06-27 16:37:30,026 INFO L175 Difference]: Start difference. First operand has 485 places, 698 transitions, 16767 flow. Second operand 29 states and 299 transitions. [2024-06-27 16:37:30,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 970 transitions, 24578 flow [2024-06-27 16:37:33,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 970 transitions, 23530 flow, removed 286 selfloop flow, removed 16 redundant places. [2024-06-27 16:37:33,765 INFO L231 Difference]: Finished difference. Result has 505 places, 738 transitions, 17535 flow [2024-06-27 16:37:33,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=15855, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=17535, PETRI_PLACES=505, PETRI_TRANSITIONS=738} [2024-06-27 16:37:33,766 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 480 predicate places. [2024-06-27 16:37:33,766 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 738 transitions, 17535 flow [2024-06-27 16:37:33,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.387096774193548) internal successors, (167), 31 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:37:33,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:37:33,766 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] [2024-06-27 16:37:33,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-06-27 16:37:33,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-06-27 16:37:33,978 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:37:33,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:37:33,978 INFO L85 PathProgramCache]: Analyzing trace with hash 337550071, now seen corresponding path program 35 times [2024-06-27 16:37:33,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:37:33,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664493619] [2024-06-27 16:37:33,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:37:33,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:37:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:37:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:37:34,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:37:34,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664493619] [2024-06-27 16:37:34,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664493619] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:37:34,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373221159] [2024-06-27 16:37:34,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:37:34,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:37:34,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:37:34,563 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:37:34,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-06-27 16:37:34,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 16:37:34,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:37:34,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2024-06-27 16:37:34,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:37:35,170 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 224 treesize of output 122 [2024-06-27 16:37:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:37:35,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:37:36,847 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:37:36,848 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 381 treesize of output 232 [2024-06-27 16:37:37,155 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:37:37,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373221159] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:37:37,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:37:37,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 30 [2024-06-27 16:37:37,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988567562] [2024-06-27 16:37:37,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:37:37,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:37:37,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:37:37,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:37:37,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:37:37,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:37:37,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 738 transitions, 17535 flow. Second operand has 30 states, 30 states have (on average 5.2) internal successors, (156), 30 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:37:37,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:37:37,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:37:37,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:37:47,487 INFO L124 PetriNetUnfolderBase]: 7217/13179 cut-off events. [2024-06-27 16:37:47,487 INFO L125 PetriNetUnfolderBase]: For 798450/798450 co-relation queries the response was YES. [2024-06-27 16:37:47,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135099 conditions, 13179 events. 7217/13179 cut-off events. For 798450/798450 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 102628 event pairs, 1317 based on Foata normal form. 13/13192 useless extension candidates. Maximal degree in co-relation 134954. Up to 4346 conditions per place. [2024-06-27 16:37:47,650 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 747 selfloop transitions, 420 changer transitions 36/1204 dead transitions. [2024-06-27 16:37:47,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 1204 transitions, 28353 flow [2024-06-27 16:37:47,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-06-27 16:37:47,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-06-27 16:37:47,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 474 transitions. [2024-06-27 16:37:47,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3963210702341137 [2024-06-27 16:37:47,651 INFO L175 Difference]: Start difference. First operand has 505 places, 738 transitions, 17535 flow. Second operand 46 states and 474 transitions. [2024-06-27 16:37:47,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 1204 transitions, 28353 flow [2024-06-27 16:37:52,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 1204 transitions, 27719 flow, removed 56 selfloop flow, removed 16 redundant places. [2024-06-27 16:37:52,043 INFO L231 Difference]: Finished difference. Result has 548 places, 862 transitions, 21194 flow [2024-06-27 16:37:52,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=16945, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=21194, PETRI_PLACES=548, PETRI_TRANSITIONS=862} [2024-06-27 16:37:52,044 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 523 predicate places. [2024-06-27 16:37:52,044 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 862 transitions, 21194 flow [2024-06-27 16:37:52,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.2) internal successors, (156), 30 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:37:52,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:37:52,045 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:37:52,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-06-27 16:37:52,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-06-27 16:37:52,256 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:37:52,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:37:52,257 INFO L85 PathProgramCache]: Analyzing trace with hash 376820889, now seen corresponding path program 36 times [2024-06-27 16:37:52,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:37:52,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301594027] [2024-06-27 16:37:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:37:52,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:37:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:37:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:37:52,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:37:52,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301594027] [2024-06-27 16:37:52,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301594027] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:37:52,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239876536] [2024-06-27 16:37:52,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:37:52,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:37:52,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:37:52,616 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:37:52,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-06-27 16:37:52,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-06-27 16:37:52,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:37:52,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 22 conjunts are in the unsatisfiable core [2024-06-27 16:37:52,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:37:52,894 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 91 treesize of output 59 [2024-06-27 16:37:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:37:52,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:37:53,047 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:37:53,047 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 51 treesize of output 27 [2024-06-27 16:37:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:37:53,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239876536] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:37:53,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:37:53,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2024-06-27 16:37:53,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470590694] [2024-06-27 16:37:53,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:37:53,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:37:53,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:37:53,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:37:53,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:37:53,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:37:53,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 862 transitions, 21194 flow. Second operand has 19 states, 19 states have (on average 5.947368421052632) internal successors, (113), 19 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:37:53,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:37:53,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:37:53,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:37:58,064 INFO L124 PetriNetUnfolderBase]: 7169/13054 cut-off events. [2024-06-27 16:37:58,064 INFO L125 PetriNetUnfolderBase]: For 798685/798685 co-relation queries the response was YES. [2024-06-27 16:37:58,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135945 conditions, 13054 events. 7169/13054 cut-off events. For 798685/798685 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 101646 event pairs, 4844 based on Foata normal form. 14/13068 useless extension candidates. Maximal degree in co-relation 135788. Up to 11955 conditions per place. [2024-06-27 16:37:58,219 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 799 selfloop transitions, 82 changer transitions 5/887 dead transitions. [2024-06-27 16:37:58,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 887 transitions, 23439 flow [2024-06-27 16:37:58,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:37:58,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:37:58,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 87 transitions. [2024-06-27 16:37:58,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3717948717948718 [2024-06-27 16:37:58,220 INFO L175 Difference]: Start difference. First operand has 548 places, 862 transitions, 21194 flow. Second operand 9 states and 87 transitions. [2024-06-27 16:37:58,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 887 transitions, 23439 flow [2024-06-27 16:38:03,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 887 transitions, 22492 flow, removed 325 selfloop flow, removed 19 redundant places. [2024-06-27 16:38:03,209 INFO L231 Difference]: Finished difference. Result has 535 places, 858 transitions, 20336 flow [2024-06-27 16:38:03,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=20063, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=854, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=775, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20336, PETRI_PLACES=535, PETRI_TRANSITIONS=858} [2024-06-27 16:38:03,211 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 510 predicate places. [2024-06-27 16:38:03,211 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 858 transitions, 20336 flow [2024-06-27 16:38:03,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.947368421052632) internal successors, (113), 19 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:38:03,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:38:03,212 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] [2024-06-27 16:38:03,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-06-27 16:38:03,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-06-27 16:38:03,423 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:38:03,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:38:03,424 INFO L85 PathProgramCache]: Analyzing trace with hash 940763243, now seen corresponding path program 37 times [2024-06-27 16:38:03,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:38:03,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335856538] [2024-06-27 16:38:03,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:38:03,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:38:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:03,969 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:38:03,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:38:03,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335856538] [2024-06-27 16:38:03,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335856538] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:38:03,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093143399] [2024-06-27 16:38:03,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:38:03,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:03,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:38:03,971 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:38:03,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-06-27 16:38:04,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:04,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2024-06-27 16:38:04,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:38:04,421 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 189 treesize of output 105 [2024-06-27 16:38:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:38:04,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:38:06,024 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:38:06,025 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 310 treesize of output 202 [2024-06-27 16:38:06,249 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:38:06,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093143399] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:38:06,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:38:06,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2024-06-27 16:38:06,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414146328] [2024-06-27 16:38:06,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:38:06,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:38:06,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:38:06,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:38:06,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:38:06,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:38:06,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 858 transitions, 20336 flow. Second operand has 26 states, 26 states have (on average 5.5) internal successors, (143), 26 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:38:06,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:38:06,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:38:06,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:38:17,594 INFO L124 PetriNetUnfolderBase]: 9267/17051 cut-off events. [2024-06-27 16:38:17,595 INFO L125 PetriNetUnfolderBase]: For 1044372/1044372 co-relation queries the response was YES. [2024-06-27 16:38:17,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174885 conditions, 17051 events. 9267/17051 cut-off events. For 1044372/1044372 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 139012 event pairs, 3608 based on Foata normal form. 16/17067 useless extension candidates. Maximal degree in co-relation 174733. Up to 8169 conditions per place. [2024-06-27 16:38:17,835 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 795 selfloop transitions, 511 changer transitions 47/1354 dead transitions. [2024-06-27 16:38:17,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 1354 transitions, 34202 flow [2024-06-27 16:38:17,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-06-27 16:38:17,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-06-27 16:38:17,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 448 transitions. [2024-06-27 16:38:17,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4202626641651032 [2024-06-27 16:38:17,837 INFO L175 Difference]: Start difference. First operand has 535 places, 858 transitions, 20336 flow. Second operand 41 states and 448 transitions. [2024-06-27 16:38:17,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 1354 transitions, 34202 flow [2024-06-27 16:38:25,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 1354 transitions, 34056 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 16:38:25,109 INFO L231 Difference]: Finished difference. Result has 583 places, 1068 transitions, 27203 flow [2024-06-27 16:38:25,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=20190, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=858, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=329, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=27203, PETRI_PLACES=583, PETRI_TRANSITIONS=1068} [2024-06-27 16:38:25,110 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 558 predicate places. [2024-06-27 16:38:25,110 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 1068 transitions, 27203 flow [2024-06-27 16:38:25,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.5) internal successors, (143), 26 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:38:25,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:38:25,111 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] [2024-06-27 16:38:25,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-06-27 16:38:25,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-06-27 16:38:25,322 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:38:25,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:38:25,323 INFO L85 PathProgramCache]: Analyzing trace with hash -525884889, now seen corresponding path program 38 times [2024-06-27 16:38:25,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:38:25,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767082016] [2024-06-27 16:38:25,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:38:25,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:38:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:38:26,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:38:26,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767082016] [2024-06-27 16:38:26,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767082016] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:38:26,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787323837] [2024-06-27 16:38:26,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:38:26,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:26,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:38:26,028 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:38:26,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-06-27 16:38:26,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:38:26,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:38:26,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 16:38:26,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:38:26,433 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 117 treesize of output 77 [2024-06-27 16:38:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:38:26,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:38:27,646 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:38:27,646 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 258 treesize of output 170 [2024-06-27 16:38:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:38:28,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787323837] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:38:28,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:38:28,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 31 [2024-06-27 16:38:28,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108670919] [2024-06-27 16:38:28,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:38:28,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:38:28,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:38:28,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:38:28,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:38:28,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 16:38:28,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 1068 transitions, 27203 flow. Second operand has 31 states, 31 states have (on average 5.419354838709677) internal successors, (168), 31 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:38:28,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:38:28,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 16:38:28,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:38:38,592 INFO L124 PetriNetUnfolderBase]: 10318/19000 cut-off events. [2024-06-27 16:38:38,593 INFO L125 PetriNetUnfolderBase]: For 1226291/1226291 co-relation queries the response was YES. [2024-06-27 16:38:38,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200319 conditions, 19000 events. 10318/19000 cut-off events. For 1226291/1226291 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 158363 event pairs, 5568 based on Foata normal form. 14/19014 useless extension candidates. Maximal degree in co-relation 200153. Up to 13884 conditions per place. [2024-06-27 16:38:38,897 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 982 selfloop transitions, 353 changer transitions 39/1375 dead transitions. [2024-06-27 16:38:38,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 1375 transitions, 36831 flow [2024-06-27 16:38:38,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-06-27 16:38:38,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-06-27 16:38:38,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 342 transitions. [2024-06-27 16:38:38,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38687782805429866 [2024-06-27 16:38:38,899 INFO L175 Difference]: Start difference. First operand has 583 places, 1068 transitions, 27203 flow. Second operand 34 states and 342 transitions. [2024-06-27 16:38:38,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 1375 transitions, 36831 flow